JPS61100085A - Color image pickup device - Google Patents

Abstract

PURPOSE:To generate stable, good color picture by providing a pattern for signal generation that generates index signals corresponding to the mode of scanning by an electronic beam in the light path to photoelectric conversion in an image pickup tube. CONSTITUTION:Frequency information in electron beam scanning and initial phase information for each horizontal scanning time in electronic beam scanning are generated in output signals of an image pickup tube 2. For instance, a black and white pattern is provided around a color separation striped filter F or the pattern is provided around a photoelectric converting section 4. Further, a member that can generate a specified index pattern is placed in the light path to the image pickup tube to form the optical image of the pattern provided in the member on the converting section 4, and index signals are generated at the time of electron beam scanning of the converting section 4.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a color television (hereinafter abbreviated as TV) imaging device, in particular, to a color separation cotton-like filter up to a photoelectric conversion surface of an imaging tube. The present invention relates to a 4.1-component color imaging device provided in the optical path of a.

(Prior art) A color-separating striped filter is provided in the optical path up to the photoelectric conversion surface of the image pickup tube, and a striped color-separated image of the object to be imaged is applied to the photoelectric conversion surface of the image pickup tube. It is well known that various formats of color imaging devices that generate multiplexed signals have been known, but most of them are configured according to the so-called general phase separation method. Even if it is configured according to the so-called general frequency separation method, there are various problems, so the applicant company has decided to use the conventional general phase separation method. In order to provide a color imaging device that does not have the problems of those configured according to the separation method and those configured as those configured according to the general frequency separation method, Japanese Patent Publication No. 53-3
We proposed a color imaging method as disclosed in Japanese Patent Publication No. 4854, and as an improvement on it, we published Japanese Patent Application Laid-Open No. 59-153392.
A color imaging device as disclosed in the above publication, that is, consisting of a repetition of a specific arrangement pattern of a plurality of types of color stripes, each having a predetermined stripe, and corresponding to the repetition of said arrangement pattern. The color separation striped filter, in which the colors of each of the plurality of color strips are set, is used for photoelectric conversion of the image pickup tube so that the phase of the fundamental wave component of the image pickup tube output signal changes depending on the color of the light. a configuration arrangement in which an optical image of an object to be imaged is provided to a photoelectric conversion section of an image pickup tube via a color separation striped filter, and a reduction in the output signal from the image pickup tube; Both are provided with a storage device capable of arbitrarily storing information signals corresponding to one frame period, and prior to imaging, an arbitrary specific color is imaged, and at least I frame M of the image pickup tube output/output signal is stored.
storing an information signal corresponding to rJJ in the storage device;
Color imaging in which a reference signal for color signal demodulation is obtained based on the information signal stored in the storage device, and a predetermined color signal is demodulated from the output signal of the image pickup tube by JtJ1 detection or the like. In the device, one of the two signals, the information signal obtained by reading the information signal stored in the storage device and the output signal of the image pickup tube, is used as a reference, and the time axis of the other signal is determined. Change m Ctl
We have completed a color imaging device that is equipped with means for controlling one signal so that it matches the variation on the time axis of one of the signals as a reference, and we have achieved many results by implementing it.

(Problems to be Solved by the Invention) However, in the color imaging device disclosed in the above-mentioned Japanese Unexamined Patent Publication No. 59-453392, the information signal obtained by reading out the information signal stored in the storage device as described above is One of the two signals, the information signal and the output signal of the image pickup tube, is used as a reference, and the change mode of the other signal on the time axis is calculated based on the time axis of one signal using the above reference. In order to perform control to match the change mode of the image pickup tube, the output signal of the image pickup tube is controlled in accordance with the scanning state signal generation patterns provided near the starting end and near the ending end of the horizontal scanning period. Since the frequency information in electron beam scanning obtained based on the generated index signal and the initial phase information for each horizontal scanning period in electron beam scanning were used, the frequency information in electron beam scanning described above is It has been obtained through the period that includes.

However, depending on the incident light conditions, carrier waves in the color multiplexed signal may not be generated for signals generated during the video period. If the frequency information in the electron beam scanning is obtained through the image period, there is a means to prevent the influence of the carrier wave in the color multiplexed signal from occurring even when there is no incident light during the image period and the carrier wave in the color multiplexed signal is not generated. However, the problem was that the stability was not sufficient.

(Means for determining between two points) The present invention consists of repeating a specific arrangement pattern of a plurality of strips of one color each having a predetermined strip width, and corresponds to the repetition of the above arrangement pattern. ′,, % A color separation striped filter in which the colors of each of the plurality of hue strips are set so that the phase of the fundamental wave component of the blood vessel output signal changes depending on the color of light is imaged. 1. A single-layer arrangement provided in the optical path up to the photoelectric conversion section of the tube so that an optical image of the object to be imaged is given to the photoelectric conversion section of the image pickup tube via the color-separated striped filter; A storage device is provided which can arbitrarily store information signals corresponding to at least one frame period of the output signal from the image pickup tube. An information signal corresponding to at least one frame period is stored in the storage device, a reference signal for color signal demodulation is obtained based on the information signal stored in the storage device, and the output of the image pickup tube is thereby obtained. In a color imaging device that demodulates a predetermined color signal from a signal by synchronous detection or the like, at least one end of both horizontal ends of a photoelectric conversion section of an imaging tube and a W1 end in a vertical direction. A photoelectric conversion section in the image pickup tube is provided with a signal generation pattern capable of generating an index signal corresponding to the mode of scanning by the electron beam during scanning by the electron beam. means provided in the optical path up to, and both vertical ends of the photoelectric conversion section of the image pickup tube; means for obtaining frequency information in electron beam scanning based on the index signal generated in the signal; and a means provided at at least one of both horizontal ends of the photoelectric conversion section of the image pickup tube. means for generating an initial phase information (J) for each horizontal scanning period in electron beam scanning based on the index signal generated in the output signal of the image pickup tube in correspondence with a pattern for signal generation; an information signal obtained by reading an information signal stored in the tα device based on the frequency information in the electron beam scanning and the initial phase information for each horizontal scanning period in the electron beam scanning;
Using one of the two signals, which is the output signal of the image pickup tube, as a reference, the change mode of the other signal on the time axis is made to match the change mode of the one signal on the time axis, which is the reference signal. The object of the present invention is to provide a color imaging device provided with means for controlling the image.

(Example) Hereinafter, with reference to the attached drawings, color a (Qt
The specific contents of the device will be explained in detail.

1 to 4 are block diagrams of various embodiments of the color imaging device of the present invention, in which 0 is the object to be imaged, 1 is the imaging lens, 2 is the imaging tube, 3 is the deflection yoke, 4 is a photoelectric conversion unit (target having a photoelectric conversion surface) of the image pickup tube 2, F is an optical color separation striped filter (color separation striped filter), 5 is a front plate of the image pickup tube 2, PrA is a preamplifier, LPFy , l, PF 12 is a low-pass filter (low-pass filter), and BPF is a bandpass filter. In addition, the image pickup tube 2
It goes without saying that the deflection yoke 3 is unnecessary if an electrostatic deflection type imaging tube is used as the image pickup tube.

In the color imaging device shown in FIGS. 1 to 4.

When the optical image of the object to be imaged 0 is applied to the photoelectric conversion section 4 of the image pickup tube 2 through the color separation striped filter F, the image from the image pickup tube 2 corresponds to the optical image of the object to be imaged 0 described above. , an image pickup tube 2 containing a DC component and a modulated wave in which a color multiplex carrier wave having a specific repetition frequency is amplitude-two-phase modulated by a signal.
However, in the color imaging device of the present invention, at least one of the horizontal ends of the photoelectric conversion section 4 of the image pickup tube 2 and both vertical ends At least one end of the image pickup tube 2 is provided with a signal generation pattern capable of generating an index signal that corresponds to the mode of scanning by the electron beam during scanning by the electron beam. Since the output signal of the image pickup tube 2 is provided in the optical path up to the photoelectric conversion section 4, at least one of the vertical ends of the photoelectric conversion section 4 of the image pickup tube 2 is included in the output signal of the image pickup tube 2. Frequency information in electron beam scanning generated in correspondence with the provided index signal generation pattern and at least one of both horizontal ends of the optical conversion section 4 of the image pickup tube 2. It includes initial phase information for each horizontal scanning period in electron beam scanning generated in correspondence with the provided index signal generation pattern.

As described above, in order to generate frequency information in electron beam scanning and initial phase information for each horizontal scanning period in electron beam scanning in the output signal of image pickup tube 2, photoelectric conversion unit 4 of image pickup tube 2 For example, the pattern of the color separation striped filter F described above may be used as the pattern for generating the index signal that should be provided in the optical path up to In order to generate the index signal from the pattern of the striped filter F, light of any specific color may be applied as bias light to the periphery of the color separation striped filter F to generate the index signal.

Further, as another example of the above-described index signal generation pattern that should be provided in the optical path up to the photoelectric conversion section 4 of the above-mentioned image pickup tube 2, for example, a black and white A pattern may be provided around the photoelectric conversion section 4 of the image pickup tube 2, or a pattern may be processed and provided around the photoelectric conversion section 4 of the image pickup tube 2, or other members capable of generating a predetermined index pattern may be provided in the optical path to the image pickup tube 2. , so that an optical image of the pattern provided on the member is formed on the photoelectric conversion section 4 of the image pickup tube 2,
An index signal may be generated when scanning the photoelectric conversion unit 4 with the electron beam.

(,) to (i) in FIG. 5 are index signal generation patterns that should be placed in the optical path up to the photoelectric converter 4 in the image pickup tube 2 as described above in the color imaging device of the present invention, i.e. , at least one of the horizontal ends and at least one of the vertical ends of the photoelectric conversion unit 4 of the image pickup tube 2 are scanned by the electron beam. The setting area of the signal generation pattern is such that an index signal corresponding to the scanning mode by the electron beam can be generated.
This is an illustration and explanation of a setting example of the range of electron beam scanning performed on the photoelectric conversion unit 4 of operation Pg2 and what kind of configuration should be made. The square box │ indicates the range of electron beam scanning performed on the photoelectric conversion unit 4 of the image pickup tube 2,
Further, the shaded area in the figure indicates the setting area of the index signal generation pattern, and the horizontal direction in the figure is the horizontal scanning direction, and the vertical direction in the figure is the vertical scanning direction.

Now, the one-color separation striped filter F is, for example, shown in (a) in FIG.
As shown, red (R), green (G).

It is constructed by arranging strips of each color of blue (B) in a predetermined green-turning order.

Alternatively, as shown in FIG. 6(b).

Those composed of green (G), cyan (Cy), and golden light (W) color strips arranged in a predetermined repeating order, and other arbitrarily selected multiple types of colors. Those consisting of repeating specific array patterns of strips are used.

The color stripes of each color that should constitute the above-mentioned color separation striped filter F are selected in consideration of the flatness characteristics and color reproducibility.

For example, in the color separation cotton-like filter F illustrated in FIG. )〉(in the strip of red color strip)〉(in the strip of blue hue strip) In this example, the strip in each color strip is determined.

1 to 4, the output signal from the image pickup tube 2 (
The color multiplexed signal) is a DC component and one color separation wave striped filter F.
The repetition period T of the set of color strips in ((a) of Fig. 6)
, a single carrier wave having a frequency shown as the reciprocal of T) in (b), and a modulated wave whose amplitude and phase are modulated by a plurality of color information. Since there is It is possible to demodulate each predetermined color signal individually by performing synchronous detection using the base jJJ signal having a base jJJ signal. A reference signal is required.

Then, the phase of the fundamental wave component of a single carrier wave in the output signal of the image pickup tube of the color image pickup device described above is divided by color NMr
Since the colors of the plurality of color stripes constituting the shape filter F are determined for each color, prior to the start of imaging by the color imaging device, any specific color can be detected through the color stripes and the shape filter. If the light of The phase of the fundamental wave component of the carrier wave that appears in the output signal of the image pickup tube corresponding to a specific color of light corresponds to each color other than the color that corresponds to any specific color of light. This can be used as a reference for the phase of the fundamental wave component of the carrier wave appearing in the output signal of the image pickup tube.

Therefore, as mentioned above, prior to the start of imaging by the color imaging device, light of any particular color is imaged through the color separation striped filter, and the single color obtained at that time in the output signal of the imaging tube is The fundamental wave components of the carrier waves of are stored in a storage device, and during the imaging operation in the color imaging device, the fundamental wave components of the carrier waves stored in the storage device are read out, and based on the fundamental wave components of the carrier waves, each predetermined By generating a reference signal having a phase, a desired color video signal can be generated by the color imaging device having the above-described configuration.

By the way, the scanning of the electron beam in the image pickup tube 2! If the aspect is always constant, it is created based on the signal read out from the storage device as described above (No. 3 can always be the same signal as the fundamental wave in the output signal of the image pickup tube 2, so However, the stability of the deflection circuit and deflection yoke in color imaging devices is not sufficient, and the scanning mode by the electron beam also changes depending on the external magnetic field, so it is necessary to store the deflection circuit and deflection yoke in advance in the storage device as described above. It is also possible to read out the information signal from the image pickup tube 2 and create a signal identical to the eight waves in the output signal of the image pickup tube 2 based on it.

It is not always possible to obtain the correct signal.

Therefore, in the color imaging device of the present invention, the image pickup tube output is made up of a repetition of a specific arrangement pattern of a plurality of types of color stripes, each having a predetermined stripe, and is determined in correspondence with the green pattern of the arrangement pattern. The photoelectric conversion section of the image pickup tube 2 is provided with 5 loaves of m-color striped filters in which the colors of the plurality of hue strips are set so that the phase of the fundamental wave component of the signal changes depending on the color of the light. It is prepared in the optical path up to 4,
A configuration arrangement that allows an optical image of an object 0 to be imaged to be provided to a photoelectric conversion unit 4 of an image pickup tube 2 via a color separation striped filter F, and an output signal from the image pickup tube 2 for at least one frame period. A memory device that can arbitrarily store corresponding information signals [M
A is provided, and prior to imaging, an arbitrary specific color is imaged, and an information signal corresponding to at least one frame period of the image pickup tube output signal is stored in the storage device MA,
A reference signal for color signal demodulation is obtained based on the information signal stored in the storage device MA, and thereby the image pickup tube 2
In a color imaging device in which a predetermined color signal is demodulated from the output signal of the image pickup tube 2 by synchronous detection or the like, at least one end of both horizontal ends of the photoelectric conversion section 4 of the image pickup tube 2 and a vertical direction At least one end of the image pickup tube 2 is provided with a vine-like signal generation pattern that generates an index signal that corresponds to the mode of scanning by the electron beam during scanning by the electron beam. The means that can be seen in the optical path to the photoelectric conversion unit 4 in the image pickup tube 2 corresponds to the signal generation pattern provided at at least one of the vertically opposite ends of the photoelectric conversion unit 4 of the image pickup tube 2. means for obtaining frequency information in electron beam scanning based on the index signal generated in the output signal of the image pickup tube 2; Initial phase information for each horizontal scanning period in electron beam scanning is obtained based on the index signal generated in the output signal of the image pickup tube 2 in correspondence with the signal generation pattern provided at one end of each. Based on the frequency information in the electron beam scanning and the initial phase information for each horizontal scanning period in the electron beam scanning, the memory side ■A
and an information signal obtained by reading out an information signal stored in the.

With one of the two signals, the output signal of the image pickup tube 2, as a reference, the change in the other signal on the time axis matches the change in the time axis of one signal as the reference. The above-mentioned problem is solved by a simple configuration in which a means for controlling the image pickup tube 2 outputted from the preamplifier PrA is provided in FIGS. 1 to 4. The output signal (multiplexed color signal) of is passed through low-pass filters LPFy, LPF Q and bandpass filter BPF1
The output from the low-pass filter LPFy, whose cutoff frequency is exemplified as fy in FIG.
The direct wave three-color mixed signal) is outputted to the output terminal 6 as a broadband luminance signal Sy. The curve LPFy in FIG. 7 is an example of the 6-pass characteristic of the low-pass filter LPFy, and the curves LPFI2°BPFI, etc. in FIG. BPFI
This shows an example of the six-pass band characteristic.

The output signal from the low-pass filter LPF 12, whose cut-off frequency is illustrated as fQ in FIG. The filter BPF extracts a modulated color signal based on a fundamental wave existing around a spatial frequency f1 determined by the repeating pattern of filter strips in the color separation striped filter F, and supplies it to subsequent circuits.

That is, the modulated color signal based on the fundamental wave described above is the first
In the circuit arrangement of the embodiment shown in FIGS. 2 and 4, respectively, the synchronous detector 5DETI,
In addition, in the circuit arrangement of the embodiment shown in the third diagram, the modulated color signal by the fundamental wave described above is supplied to the synchronous detector 5DET2 via the variable delay circuit VDL.
I,5 is supplied to DET2.

Furthermore, the color signal modulated by the fundamental wave mentioned above is as follows.

In the circuit section 2 of the embodiment shown in FIGS. 1 and 2, the FM detection comparison circuit F
MDC is supplied to the gate circuit c.
The signal is also supplied to the carrier start position detection circuit CD via p, and is further supplied to the memory MA.

In the circuit arrangement of the embodiment shown in FIG.
In addition to DL, it is also supplied to storage MA. The output signal from the variable delay circuit VDL is supplied to the synchronous detectors 5DETI and 5DET2 as described above, and is also supplied to the carrier start position detection circuit CD via the gate circuit GP, and also to the gate circuit Gf. The signal is also supplied to the FM detection comparison circuit FMDC via the signal.

Furthermore, in the circuit arrangement device of the embodiment shown in FIG.
In addition to TI and 5DET2, frequency conversion circuit FCONv1
It is also supplied to the gate circuits Gp and Gf.

The gate circuit Gp described above is for extracting the index signal described above that appears in the output signal of the image pickup tube 2 in each horizontal scanning period according to the index pattern described above. , is for extracting the above-mentioned index signal appearing in the output signal of the image pickup tube 2 in each vertical scanning period using the above-mentioned index pattern.

The aforementioned gate circuits Gp and Gf are provided with gate signal generating circuits GSp and GSf at predetermined timings, respectively, based on the HD pulse and VD pulse generated by the synchronizing signal generator SG provided in the color imaging device. By being supplied with the generated gate signals Sp and Sf, the gate circuit Gp converts the output signal of the image pickup tube 2 into the output signal of the image pickup tube 2 for each horizontal scanning period according to the index pattern described above. The aforementioned gate circuit Gf extracts the aforementioned index signal appearing in the output signal of the image pickup tube 2 for each vertical scanning period according to the aforementioned index pattern. .

The carrier start position detection circuit CD shown in FIGS. 1 to 3 has a function of generating a signal corresponding to the rising point of the fundamental wave in the output signal of the image pickup tube 2. This can be configured using, for example, a programmable multivibrator and a differentiating circuit.

Further, the FM detection comparison circuit FMDC shown in FIGS. 1 to 3 has a function of outputting a signal indicating the polarity and magnitude according to the frequency difference between the two signals. For example, it can be constructed by two frequency discriminators and a comparator for comparing the output signals from the two frequency discriminators. Further, PCOMP shown in FIG. 4 is a phase comparator circuit.

FCONP is a frequency comparison circuit 6. The storage device MA shown in each of FIGS. 1 to 4 above captures an image of any specific color before the color imaging device starts color imaging. storing an information signal corresponding to at least one frame period of the image pickup tube obtained;
In a state after the imaging operation by the color imaging device is started, the color imaging device is configured to be able to perform an operation such that the stored information signal can be sent out as a continuous signal on the time axis. things are used. The storage element used in the storage device n may be a digital memory or an analog memory.

In the storage devices MA shown in FIGS. 1 to 3, it is assumed that a digital memory is used as a storage element, and in the figures, ADC is an analog-to-digital converter, DM is a digital memory, and DAC is
is a digital-to-analog converter, 05Ca is an address signal generator, and 05Cc is a clock signal generator. The memory device shown in FIG. 4 [MA does not show its specific configuration, but in any case, the memory device MA to be used in the circuit arrangement shown in FIGS. The information corresponds to at least one frame period of the fundamental wave component (the signal component that has passed through the bandpass filter nPF) in the output signal of the image pickup tube obtained by imaging an arbitrary specific color prior to imaging the object to be imaged. We need something that can store the signal.

An information signal of at least one field period or more of the fundamental wave component (the signal component that has passed through the bandpass filter BPF) in the output signal of the image pickup tube that is to be sent to the storage device MA prior to imaging the object. The storage operation is started by operating a predetermined operation button on an operation section (not shown) provided on the color handling device a.

That is, when a predetermined operation button on the operation unit provided in the color imaging device is operated, for example, light of an arbitrary specific color is automatically applied to the image pickup tube, and the storage device MA is set as a storage mode, so that at least one frame of signal components in the output signals of the image tubes 1 and 2 that have passed through the bandpass filter BPF are stored in the memory of the storage device.

The information signal to be stored in the storage device MA is as follows.

(b) Fundamental wave component in the image pickup tube output signal as described above; (b) A signal obtained by dividing the fundamental wave component in the image tube output signal; (c) Frequency conversion of the fundamental wave component in the image tube output signal. (This can be implemented by using a frequency conversion circuit, as in the circuit arrangement of the embodiment shown in Figure 4)
Any of these can be used.

In the circuit arrangement shown in FIGS. 1 to 3, the analog-to-digital converter ADC performs an AD conversion operation using a sampling pulse given from a pulse source (not shown), provides a digital signal to the digital memory, and supplies the digital signal to the digital memory DM. stores the digital signal applied to it. It goes without saying that the storage of sequential digital signals in the digital memory DM is performed by the address signal generated by the address signal generator 05Ca, and the address signal generator 05Ca is generated by the clock signal generator 05Cc. It is operated by the clock signal given by

When the aforementioned storage device MA is put into the storage mode and an information signal corresponding to one frame period has been stored for its digital memory opening, the storage device HA is put into the reading mode and one frame period is stored from the digital memory opening. The information signal stored corresponding to the frame period is read out 11 times, converted into an analog signal by the digital-to-analog converter DAC, and then output from the storage device MA. However, the output signal from the storage device MA is It is supplied to a reference signal generator SSG.

The reference signal generator SSG described above generates the synchronous detector 5DETI based on the signal supplied from the storage device MA.

It generates continuous reference signals each having a predetermined phase required when demodulating the color signal in 5DET2 and supplies them to the synchronous detectors 5DETI and 5DET2, which includes, for example, a phase-locked loop. The synchronous oscillator may be composed of a synchronous oscillator and a phase shifter.

Further, in the circuit arrangement of the embodiment shown in FIG.

When the above-mentioned storage device MA is put into the storage mode prior to the imaging operation, the information signal corresponding to a period longer than one frame period to be stored in the memory of the storage bag This is a signal whose frequency has been converted by the conversion circuit FCONV1, and after the signal has been stored in the storage device MA, the storage device MA is put into the read mode and the information signal stored therein is repeatedly read out from the memory. When read, the information signal output from the storage device MA is frequency-converted by the frequency conversion circuit FCONV2, restored to a signal in the same frequency band as the output signal of the image pickup tube, and then supplied to the reference signal generator SSG. As shown in FIG. 1, the signals stored in the storage device MA and the signals read out from the storage device MA have been subjected to frequency conversion. This is different from the embodiments shown in FIGS.

Now, in the color imaging device shown in FIG.
The manner in which the information signal read from MA (the information signal previously stored in the storage device MA) changes on the time axis is
The carrier start position detection circuit C is configured so that the signal changes in accordance with the change on the time axis in the output signal actually output from the image pickup tube during the imaging operation.
D. FM detection comparison circuit FMDC1 memory device! i! Each component of the MA operates in a related manner, and
In the circuit arrangement shown in FIGS. 2 and 3,
The information signal read from the storage device MA (previously stored in the storage device
Based on the changes in the information signal stored in A) on the time axis, the color signal modulated by the fundamental wave actually output from the image pickup tube during the imaging operation follows on the time axis. In the second diagram, the carrier start position detection circuit CD, the FM detection comparison circuit FMDC
- Each component such as the storage device MA and the deflection circuit DEFC is made to operate in a related manner, and in the case shown in FIG. 3, the carrier start position detection circuit CD, the FM detection comparison circuit FMDC1, the storage device MA, and the variable delay circuit VD
Each component such as L operates in a related manner.

Furthermore, in the circuit arrangement shown in FIG.
The information signal read from the frequency conversion circuit FCONV2
The mode of change on the time axis of the information signal whose frequency has been converted by the method changes in accordance with the mode of change on the time axis of the output signal actually output from the image pickup tube during imaging operation. As shown, the phase comparator circuit PCO
MP, frequency comparison circuit FCOMP, voltage controlled oscillator VC
The components such as O, the frequency conversion circuit FCONV2, and the memory bag [MA] operate in a related manner.

First, when the color imaging device of the embodiment shown in the first figure is put into the imaging mode and an information signal is read out from the storage device MA, the output signal from the bandpass filter BPF, that is, the output of the imaging tube. The modulated color signal by the fundamental wave in the signal is given to the carrier start position detection circuit CD via the gate circuit Gp, and is also given to the FM detection comparison circuit FMDC via the gate circuit Gf.

On the other hand, at that time, the signal read from the digital memory DA of the storage device [MA and converted into an analog signal by the digital-to-analog converter DAC, that is, as described above, is stored in the storage device [MA in advance]. After the signal in which the fundamental wave in the output signal of the image pickup tube that has been placed is converted into a reference signal by the reference signal generator fissG, the carrier start position detection circuit CD and the FM detection comparison circuit FM
DC.

The FM detection/comparison circuit FMDC uses the two signals given to it, namely, the toning signal modulated by the fundamental wave in the image pickup tube output signal output from the bandpass filter BPF, and the reference signal from the reference signal generator SSG. A signal corresponding to the frequency difference between the two signals is outputted, and the signal is given to the clock signal generator 05Cc in the storage device MA, and the period of the clock signal generated by the clock signal generator 05Cc is changed between the two signals. In the carrier start position detection circuit CD, which is supplied with a color signal modulated by the fundamental wave in the image pickup tube output signal output from the bandpass filter BPF, the beam blanking period It outputs a pulse at the point in time when the carrier appears and outputs a pulse to the memory device [address signal generator 05 in MA
Ca and reset it.

In the embodiment shown in FIG. 1, correct centering is performed by resetting the address signal generator 05Ca in the storage device MA by the output pulse of the carrier start position detection circuit CD as described above, and FM detection comparison. The period of the clock signal output from the clock signal generator 05Cc is changed by the output signal of the circuit FMDC, so that the signal supplied from the storage device MA is the basic of the image pickup tube output signal output from the bandpass filter BPF. This shows a time-axis variation similar to the time-axis variation of the modulated color signal due to waves.

Next, the color imaging device of the embodiment shown in the second figure takes an image.

When put into image mode, memory device fiMA (memory device MA
has an address signal generator 05Ca that is reset by a reference synchronization signal supplied to the terminal 7.
While the number is being read out, the output signal from the bandpass filter BPF, that is, the color signal modulated by the fundamental wave in the output signal of the image pickup tube is given to the carrier start position detection circuit CD via the gate circuit GP. At the same time, it is also applied to the FM detection comparison circuit FMDC via the gate circuit Gf, so that the above-mentioned gate circuit Gp,
In Gf, it depends on the fundamental wave in the output signal of the image pickup tube supplied to it! The above-mentioned index signal is extracted from the two-modulation color signal and supplied to the carrier start position detection circuit CD and the FM detection comparison circuit FMDC.

At that time, the signal read from the digital memory OA of the storage device and converted into an analog signal by the digital-to-analog converter DAC, that is, the signal that was previously stored in the storage device MA prior to imaging, as described above. The restored signal of the fundamental wave in the output signal of the image pickup tube is supplied to a reference signal generator S.
It is supplied to SG.

Thereby, the reference signal generated from the reference signal generator SSG is supplied to the detector comparison circuit FMDC and the carrier start position detection circuit CD.

The FM detection and comparison circuit FMDC extracts the index signal extracted by the gate circuit Gf from the above-mentioned two signals applied thereto, that is, the color signal modulated by the fundamental wave in the image pickup tube output signal output from the bandpass filter BPF; It outputs a signal according to the frequency difference with the signal output from the storage device MA, and supplies it to the deflection mount DEFC.

Further, since the above-described deflection circuit DEFC is also supplied with the output signal from the carrier start position detection circuit CD, the deflection circuit DEFC uses the output signal from the FM detection comparison circuit FMDC to connect the above-mentioned FM detection comparison circuit FMD.
By changing the deflection mode of the electron beam in the direction in which the output signal from C becomes zero, and by the output signal from the carrier start position detection circuit CD.

The electron beam is deflected in such a way that good centering can be obtained. In the example shown in the second figure, it is assumed that an electromagnetic deflection type is used as the image pickup tube 2, but in practice, an electrostatic deflection type may be used as the image pickup tube 2. In that case, it goes without saying that the eccentric circuit used will be changed accordingly.

In the color imaging device shown in the second diagram, the deflection circuit DHFC can perform a deflection operation at predetermined horizontal and vertical deflection frequencies during imaging of an arbitrary specific color that is performed prior to imaging the object to be imaged. It is natural that this is the case.

D2 In the illustrated embodiment, the deflection operation is controlled by the output pulse of the carrier start position detection circuit CD to ensure good centering, and the electron beam is controlled by the output signal of the FM detection comparison circuit FMDC as described above. By changing the deflection frequency of , the color signal modulated by the fundamental wave in the image pickup tube output signal output from the bandpass filter BPF is changed to the color signal modulated by the fundamental wave in the image pickup tube output signal outputted from the bandpass filter BPF. The output signal of the reference signal generator SSG exhibits a time axis variation similar to that of the output signal of the MA, that is, a signal exhibiting a time axis variation similar to that of the reference signal.

Next, when the color imaging device of the embodiment shown in the third figure is put into the imaging mode and the information signal is read out from A into the storage device, the output signal from the bandpass filter BPF, that is, the output signal from the imaging tube. The modulated color signal by the fundamental wave in the output signal is given to the variable delay circuit VDL, and at the same time, it is read out from the digital memory DA of the storage device ffMA and converted into an analog signal by the digital-to-analog converter DAC. The signal, that is, the restored fundamental wave of the image pickup tube output signal, which has been previously stored in the storage device HA prior to imaging as described above, is supplied to the reference signal generator SSG to generate a reference signal. The reference signal generated by the detector SSG is supplied to an FM detection comparison circuit FMDC, a carrier start position detection circuit CD, and the like.

The output signal of the variable delay circuit VDL is also supplied to the FM detection comparison circuit FMDC via the gate circuit Gf. The above-mentioned index signal extracted from the modulated color signal by the fundamental wave is supplied. As a result, this FM
The detection comparison circuit FMDC outputs a signal according to the frequency difference between the modulated color signal by the fundamental wave in the image pickup tube output signal output from the bandpass filter 1mBPF and the reference signal (same as the output signal from the storage device i1A). Then, it is supplied to the variable delay circuit VDL as a control signal.

Further, the variable delay circuit VDL is supplied with an output signal from the carrier start position detection circuit CD, which is supplied with an index signal extracted by the gate circuit GP from the color signal modulated by the fundamental wave in the output signal of the image pickup tube. Since variable delay circuit VDL is also supplied, then FM
The output signal from the detection comparison circuit FMDC changes the delay amount of the variable delay circuit VDL in the direction in which the output signal from the FM detection comparison circuit FMDC becomes negative, and the output from the carrier start position Fg detection circuit CD changes. The signal causes a delay to be applied to the output signal of the variable delay circuit VDL such that good centering is achieved.

Thereby, the delay amount of the modulated color signal by the fundamental wave in the image pickup tube output signal output from the bandpass filter BPF is controlled by the variable delay circuit VDL.
This shows a time axis variation similar to the time axis variation of the signal supplied from the storage device MA to the reference signal generator SSG.

Next, in the embodiment shown in FIG. 4, the modulated color signal output from the bandpass filter BPF is subjected to synchronous detection.
5DETI, 5DET2, and frequency conversion circuit FCO
NVI, the frequency comparison circuit FCOMP, and the one-phase comparison circuit PCOMP.

The frequency conversion circuit FCONVI described above is provided with a carrier wave for frequency conversion from the oscillator OSC.

The carrier wave for frequency conversion is supplied from the same oscillator O3C as the oscillator OSC that supplies the carrier wave for frequency conversion to the frequency conversion circuit FCONV2, which will be described later.

The signal output from the frequency conversion circuit FCONVI described above is stored in the memory device MA when the memory device HA is put into the write mode, and is stored in the memory device i! When the MA is placed in read mode, its stored contents are repeatedly read out. If the signal stored in the storage device MA as described above is a signal obtained by beating down the original signal by the frequency conversion operation in the frequency conversion circuit FCONVI, the storage capacity will be reduced. The advantage is that it becomes possible to use a smaller storage device MA.

Once the perpetrated storage device MA has been put into storage mode and an information signal corresponding to a suitable period of one or more frame periods has been stored therein, the storage device MA is then put into read mode and the information stored thereon has been stored. The signal is the storage device iiM
A is repeatedly read out and supplied to the frequency conversion circuit FCONV2.

The frequency conversion circuit FCONV 2 has 5 oscillators OS
A carrier wave for frequency conversion is supplied from C, and the output signal from the frequency conversion circuit FCONV2 whose frequency has been converted by the frequency conversion circuit FCONV2 is supplied to the reference signal generation 9SSG and at the same time to the 1 phase comparison circuit PCOM.
P and 1 frequency comparator circuit FCOMP are also supplied.

The above-mentioned phase comparison circuit PCOMP also includes the above-mentioned index signal extracted via the gate circuit GP from the color signal modulated by the fundamental wave in the image pickup tube output signal output from the above-mentioned bandpass filter BPF. is supplied to the frequency comparison circuit FCOMP, and the gate circuit G is selected from the modulated color signal by the fundamental wave in the output signal of the image pickup tube outputted from the bandpass filter BPF.
Since the above-mentioned index signal extracted through f is supplied, the phase comparator circuit PCOMP compares the phase of the index signal extracted from the output signal from the above-mentioned bandpass filter BPF and the frequency conversion circuit FCONV2. The phase comparison circuit PCO compares the phase of the output signal.
The output signal from P is used to control the phase of the oscillation wave of the oscillator described above, and the frequency comparison circuit FCOMP controls the index signal extracted from the output signal from the bandpass filter BPF. The output signal from the frequency comparison circuit FCOMP is determined to be φ of the frequency of the oscillation wave of the oscillator O5C.
Used for control.

Therefore, by subjecting the oscillator O3C to the frequency control and phase control described above, the frequency and phase of the oscillation wave are automatically controlled. The reference signal generator HH4S 5 to which the output signal (reference signal) is supplied generates the reference signal necessary for synchronously detecting the output signal of the bandpass filter BPF with the correct phase, thereby controlling the image pickup tube. The control system described above is operated so that the changes in the output signal and the output signal (reference signal) from the frequency conversion circuit FCONV2 on the time axis match.

As described above, the oscillator O5C is such that the angular frequency of the oscillating wave is controlled by the output signal from the frequency comparison circuit FCOMP, and the phase of the oscillation wave is controlled by the output signal from the phase comparison circuit PCOMP. On the parting side,
Mention may be made of the oscillator O5C shown in FIG.

The main part of the oscillator O5C shown in FIG.
The oscillation frequency of P is controlled by the voltage of the output signal of P, and the timing at which it starts oscillating is controlled by the output signal of one-shot multivibrator MM.

That is, in the one-shot multivibrator described above, the phase comparison circuit PC
It outputs a pulse with a time width up to the time position of the trailing edge of the output pulse of the OMP, and the above-mentioned resettable voltage control 94
Since the oscillator CO starts oscillating at a specific oscillation phase when the reset pulse output from the one-shot multivibrator II disappears, the oscillator O5C performs the frequency control operation as described above. Phase side □The frequency and phase of the oscillation wave are automatically controlled by the control operation, and 1 frequency conversion circuit FCON
The reference signal generator SSG to which the output signal (reference signal) of V2 is supplied generates a reference signal required for synchronously detecting the output signal of the bandpass filter BPF with the correct phase.

The output signals from the synchronous detectors 5DETI and 5DET2 and the output signal from the low-pass filter LPF Q are as follows.
Matrixed in the matrix circuit MTX,
Predetermined primary color signals are output to terminals 8-10, respectively.

(Effects of the Invention) As is clear from the detailed explanation above, the color imaging device of the present invention consists of repeating a specific arrangement pattern of a plurality of types of color stripes, each having a predetermined strip width. , so that the phase of the fundamental wave component of the image pickup tube output signal, which is determined in accordance with the repetition of the arrangement pattern described above, changes depending on the color of the light.

A color-separated MIa-like filter in which the colors of each of the plurality of color stripes are set is provided in the optical path to the photoelectric conversion section of the image pickup tube, and the optical image of the imaged object is transmitted through the color-separated stripe-like filter. at least one of the output signals from the image pickup tube.
A storage device capable of arbitrarily storing an information signal corresponding to a frame period is provided, and prior to imaging, an arbitrary specific color is imaged, and an information signal corresponding to at least one frame period of the image pickup tube output signal is stored. is stored in the storage device,
A color imaging device that obtains a reference signal for color signal demodulation based on the information signal stored in the storage device, and demodulates a predetermined color signal from the output signal of the image pickup tube by synchronous detection or the like. In the photoelectric conversion section of the image pickup tube, at least one of both ends in the horizontal direction and at least one of both ends in the vertical direction are exposed to electrons during scanning by the electron beam. means for creating a signal generation pattern in the optical path up to the photoelectric conversion section in the image pickup tube, which can generate an index signal corresponding to the S pattern of scanning by the beam; The frequency in electron beam scanning is determined based on the index signal generated in the output signal of the image pickup tube in correspondence with the signal generation pattern provided at at least one of the vertical ends of the shoulder. a means for obtaining information, and a signal generated in the output signal of the image pickup tube corresponding to a signal generation pattern provided at at least one of both ends in the horizontal direction of the photoelectric conversion section of the image pickup tube. means for obtaining initial phase information for each horizontal scanning period in electron beam scanning based on the index signal, and frequency information in electron beam scanning and initial phase for each horizontal scanning period in electron beam scanning; Based on the information, the time axis of the other signal is determined based on one of the two signals, the information signal obtained by reading out the information signal stored in the storage device, and the output signal of the Nl picture tube. Since this is a color imaging f2 device having means for controlling the above change mode to match the change mode of one of the signals on the time axis based on L:1, the color image capture device of the present invention In the device, at least one of the horizontal ends and at least one of the vertical ends of the optical conversion section of the image pickup tube are scanned by the electron beam. A signal generation pattern capable of generating an index signal corresponding to the scanning mode by an electron beam is provided in the optical path up to the photoelectric conversion unit in the image pickup tube, so that the electron beam is always generated regardless of the state of the incident light. Since the frequency information of beam scanning and the initial phase for each horizontal scanning period are correctly obtained, the color imaging device of the present invention does not have the drawbacks of the conventional devices described above. This makes it easy to always generate stable and good color images.

[Brief explanation of drawings]

1 to 4 are block diagrams of various embodiments of the color imaging device of the present invention, FIG. 5 is a diagram showing a pattern area for index signal generation, and FIG. 6 is a diagram of the color imaging device of the present invention. What section is the configuration of the color separation striped filter used? Fig. 7 shows what section the frequency distribution of the output signal of the image pickup tube is. 0...imaging object, 1...imaging lens, 2...・Image tube. 3... Deflection yoke, 4... Photoelectric conversion section of the image pickup tube (target having a photoelectric conversion surface), F... Color separation striped filter, 5... Front plate of the image pickup tube, 6~lO・...Terminal. PrA...Preamplifier, LPyF, LPFΩ...
Low-pass 3M filter (low-pass filter), BPF...bandpass filter (bandpass filter), VDL...variable delay circuit, A...storage device, CD...carrier start Position detection circuit, DC to F...FM detection comparison circuit, DE
FC...deflection circuit, MTX...matrix circuit, O3C...oscillator, CO...resettable voltage controlled oscillator, HA...storage device, PCOMP...phase comparison circuit, FCOMP...frequency Comparison circuit, MM
...One-shot multivibrator, 5DETI,
5DET2...Synchronous detection circuit, FCONVI, FC
ONV2...Frequency conversion circuit, 5SC-...Reference, signal generator, Procedure h1j Original (spontaneous) November 1975 IG Date 1982 Patent Application No. 222383 2, f @ Ming name Color imaging device 3. Relationship with the case of the person making the amendment Patent Applicant Embassy 3-12 Moriya-cho, Kanayō-ku, Yokohama-shi, Kanagawa Prefecture Name (43)
2) Victor Company of Japan Co., Ltd. 4, Agent: Month, Day, 1920 (Delivery date: Month, Day, 1927) 6. Drawing subject to amendment (Fig. 4) 7. Contents of the amendment The attached drawing, Fig. 4, is amended as shown in the attached sheet. . Yoshiko Tsukuda (mouth) June 6, 1985 Manabu Shiga, Commissioner of the Japan Patent Office Patent Application No. 222383, filed in 1988 2 Title of invention Color imaging device 3 Relationship to the amended person's case Patent Applicant envoy Address: 3-12 Moriya-cho, Kanayō-ku, Yokohama-shi, Kanagawa Prefecture Name (43)
2) Victor Japan Co., Ltd. 4, Agent address: 3-4-19-915, Higashina-yo, Tokyo Parts Industry Ward, Showa year, month, day (shipment date: Showa year, month, day) 6, Subject of amendment Drawing (Fig. 1) 7. Details of the amendment The attached drawing, Figure 1, will be amended as shown in the attached sheet.

Claims (1)

[Claims] The phase of the fundamental wave component of the image pickup tube output signal is determined by repeating a specific array pattern of multiple types of color strips, each having a predetermined strip width, and the phase of the fundamental wave component of the image pickup tube output signal is determined in accordance with the repetition of the array pattern. A color separation striped filter, in which the colors of the plurality of color strips are set so as to change depending on the color, is provided in the optical path to the photoelectric conversion section of the image pickup tube, and the light of the object to be imaged is A configuration arrangement that allows an image to be applied to a photoelectric conversion section of an image pickup tube via a color separation striped filter, and a memory capable of arbitrarily storing an information signal corresponding to at least one frame period of an output signal from the image pickup tube. A device is provided, which images an arbitrary specific color prior to imaging and stores an information signal corresponding to at least one frame period of the image pickup tube output signal in the storage device; In a color imaging device, a reference signal for color signal demodulation is obtained based on the information signal stored in the image pickup tube, and a predetermined color signal is demodulated from the output signal of the image pickup tube by synchronous detection or the like. When scanning with an electron beam, at least one of both ends in the horizontal direction and at least one of both ends in the vertical direction of the photoelectric conversion section of means for providing a signal generation pattern in the optical path up to the photoelectric conversion section of the image pickup tube, which can generate an index signal corresponding to the image pickup tube; means for obtaining frequency information in electron beam scanning based on the index signal generated in the output signal of the image pickup tube corresponding to the signal generation pattern provided at at least one end of the image pickup tube; Based on the index signal generated in the output signal of the image pickup tube in correspondence with a signal generation pattern provided at at least one of the horizontal ends of the photoelectric conversion section of the image pickup tube. means for obtaining initial phase information for each horizontal scanning period in electron beam scanning; and means for obtaining initial phase information for each horizontal scanning period in electron beam scanning; Using one of the two signals, the information signal obtained by reading out the stored information signal and the output signal of the image pickup tube, as a reference, the change mode of the other signal on the time axis is determined as a reference. A color imaging device comprising: means for controlling one of the signals so as to match the change mode on the time axis of one of the signals.