JPH0224621A - Selecting device for unmachined spectacle lens diameter - Google Patents

Abstract

PURPOSE:To enable even an inexperienced person to easily select a lens diameter by composing the lens diameter selecting device of a central processor, a display device, a storage device, an input device, and a frame shape measuring instrument and operating them according to the prescription that a patient has. CONSTITUTION:The numeric data of the prescription that the patient has are inputted to the input device 23 and sent to the central processor 20, whose output is supplied partially to the frame shape measuring instrument 5. The device 3 matches frame and groove depth data to generate a determined polar coordinate data sequence, which is sent back to the processor 20. Here, three kinds of data for a case wherein there are neither astigmatism nor a prism, a case wherein there is only sphericality, a case wherein there is no prism and there are the sphericality and astigmatism, and a case wherein there are all of the prism, sphericality, and astigmatism on the prescription of the patient, and those data are supplied to a lens machining device 1. The data are displayed on the display device 21 and also stored in the storage device 22 at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is a method for adjusting the diameter of a raw eyeglass lens so that the eyeglass lens can be attached to a eyeglass frame and can be individually adapted to the prescription of a patient who wears eyeglasses. Concerning a device for selecting.

[Prior Art] Conventionally, eyeglass lenses have been processed using the following procedure. That is, (1) select a lens according to the patient's prescription, and (2) use a lens meter to mark the center of the lens, the prescription position, and the prescription angle. (
3) On the other hand, set the eyeglass frame on a so-called molding machine by determining the frame center, and (4) copy the shape of the frame onto a resin plate called a distortion plate and cut it out. (5) Center this distortion plate and the marked lens, place it on the device, and set the processing center of the eyeglass lens by taking into account the patient's interpupillary distance l1l (PI)) specified in the prescription, the bridge length of the frame, and the lens diameter. Deciding (this work is called arranging) (6) Attach a fixing member for lens processing to it, and (7) Process the eyeglass lens using a lens processing machine (tamazuri machine) following the above-mentioned processed clay plate as a standard. do. This is a common eyeglass lens processing method.

[Problems to be Solved by the Invention] This series of operations requires skill and is almost impossible for an unskilled person. Mistakes are often made in the calculations that show the relationship between the prescription and the lenses, which are used to reflect the prescription on the glasses. There is also a lot of room for errors in processing the distorted plates. The operations that require technical skills in eyeglass stores are concentrated here, and efforts to rationalize this field are nothing but the simplification of a series of these operations.

To date, efforts have been made to make these materials convenient.

However, this is an operation to eliminate strain plates - N in machine tools.
It is not outside the scope of application of C control. In the case of numerically controlled devices to date, there is no organic combination of prescription and frame shape, so many tasks (except (4) (1)
- (7)) are left to the operator, and not only does it not reduce the risk of calculation errors and the possibility of machining errors, but it also interrupts the - part of the operation flow, making it difficult to foresee. The current situation is that the number of errors is increasing. In addition, since the data is a one-time item, it cannot be saved like a distorted plate, and if the currently processed frame is to be reprocessed, it may take more time and effort than when processing a single plate. . Of these series of operations, a particular problem is the cumbersome task of selecting a raw eyeglass lens diameter that corresponds to the selected frame.

An object of the present invention is to provide an eyeglass lens adjustment system that eliminates the troublesome task of selecting the diameter of a raw eyeglass lens and allows even an unskilled person to easily select an appropriate raw eyeglass lens diameter.

[Means for Solving the Problems] The present invention provides a frame shape measuring device (3) that measures the frame shape and creates frame shape data, and a storage device (22) that stores the frame shape as numerical data. and at least data related to the interpupillary distance and prism prescription, and an instruction signal instructing to obtain frame shape data using the frame shape measuring device (3), or the storage device an input device (23) into which a selection signal of numerical data of a desired frame shape selected from (22) is input; and frame shape data obtained by instructions from the input device (23);
Calculating means (23) that calculates the position of the lens center from the interpupillary distance and prism data and obtains position data.
20), displaying the center position of the unprocessed eyeglass lens and its actual size outer shape by superimposing it on the actual size frame image from the frame shape data obtained by the instruction from the input device (23) and the lens center position data. Display; ξ(2
1) A device for selecting a diameter of an unprocessed eyeglass lens is characterized by having the following.

[Function] In the present invention, by simply inputting the prescription value, the prism value is calculated from the diopter and converted into a shift (deviation of the lens center position relative to the pupil center position), and the interpupillary distance (
PD) and the shift (deviation of the pupil center position relative to the frame center position) obtained from the frame characteristics, and the position of this combined shift (deviation amount of the lens center position relative to the frame center position) is the center of the lens to be processed. Convert the frame data so that it comes to . This allows the prescription to be added to the frame numerical data. From the data synthesized in this way, the unprocessed eyeglass lens and the frame are displayed as superimposed figures on the display screen, and the appropriate raw eyeglass lens diameter corresponding to the selected frame can be determined.

[Embodiment] FIG. 1 is a block diagram of an embodiment of the present invention. This figure shows the system configuration of this device. 1 is a member that physically processes the lens, usually called a beading machine. 2 is a central processing unit 20, a display device 21,
It consists of a storage device 22 and an input device 23, the central processing unit 20 is a microcomputer, and the display device 21 is a member capable of displaying graphics at actual size, such as liquid crystal, plasma, EL, etc.
The storage device 22 is a non-volatile member such as a hard disk or floppy disk, and stores the shapes of various frames as numerical data together with frame attributes such as frame names and materials, and the input device 23 inputs prescriptions. At the same time, it is a device for obtaining frame shape data using a frame shape measuring device 3, which will be described later, or selecting and instructing numerical data of a desired frame shape from a storage device 22.1 It may be a normal keyboard, or a display member. It may be a touch panel integrated with the terminal, or it may be a separate terminal. If the block 2 consisting of members 20 to 23 is carefully selected, a commercially available personal computer can be used instead. Reference numeral 3 denotes a device for measuring the shape of a frame, and when the frame is set at a predetermined position, data on the frame can be measured and this data can be transferred to a communication line. Numerical data on the frame shape obtained by this frame shape measuring device can also be stored in the storage device 22 through the central processing unit 20. Numerical data stored in this way is treated in exactly the same way as previously stored numerical data.

Next, the procedure for operating this system will be described below.

First, input an instruction to obtain the frame shape using the frame shape measuring device 3 using the input device 23, and set the frame in the frame shape measuring device 3. It is output as a polar coordinate data string centered at a certain determined position (xn, yn). Calculate the center of the frame (xo, yo) from this data string, and convert this data string to (
x. , yo) into a data string of polar coordinates. At this time, if necessary, the data can be smoothed by averaging a plurality of adjacent data. This is a "normalized frame name," and what is stored as data is this data plus FPD and frame name data and a certain format. Here, the patient's prescription value is input into the input device 23. The input device 23 may be a touch panel or a keyboard, or input may be made directly from the optometry machine via a communication line. At this time, the number of input data required varies depending on the prescription. In other words, (1) the patient's prescription does not include astigmatism or prism, only sphericity; (2) the patient's prescription does not include prism, but only sphericity and astigmatism; (3) the patient's prescription does not include prism, sphericity, or astigmatism. These are the three persimmons that contain. Of course, it is possible to input astigmatism and prism even if they are not available, and combine the input methods into one type, but considering the actual work of an eyeglass store, the smaller the number of input data, the less confusion there will be. It is better to separate the three types of cases as in the above case.

Therefore, in this example, the prescription data required in (1) above is only for PD, and the prescription data required in (2) above is PD, Ax
The prescription data required for (3) above is PD, Ax
, S, C, Px, and PY.

Now, when data is input to the input device 23 in this way,
Does the central processing unit 20 find the lens center position with respect to the frame? To explain the case (3) above, first find the deviation amount of the pupil center position with respect to the frame center position from the PD, and then calculate the amount of deviation of the pupil center position from the frame center position from the PD, and then calculate the amount of deviation of the pupil center position from the frame center position. (S, C), find the amount of deviation of the lens center position from the pupil center position (in (1) and (2) above, the operation of shifting the prism is not necessary), and synthesize these to determine the frame center position. Find the amount of deviation of the lens center position for
The frame data is converted so that the position determined by the synthesized shift amount - is located at the center of the unprocessed lens.

Thereafter, in the cases of (2) and (3) above, the frame data is rotated by an amount commensurate with the axial direction of the astigmatism with the center of the unprocessed lens as the rotation center in consideration of astigmatism. The direction of the reference line of the frame at this time becomes the direction of one principal meridian of astigmatism.

The central processing unit 20 displays these calculation results on the display device 21.
As a result, the display screen of the display device 21 displays the second
Displays as shown in FIGS. 3 and 3 are performed.

In Fig. 2, left and right frame frames 24, 25, frame center positions J 24a, 25a, eye positions 24b, 25b when the frame is hung, and cross marks 24c, 25c indicating the lens center and astigmatism axis direction are shown. are displayed in an overlapping manner, and the prescription values for the left and right eyes (R, L) are also displayed. Second
The right eye (R) in the figure has astigmatism and a prism, and the left eye (L) in FIG. 2 has astigmatism and no prism.

In particular, FIG. 3 shows a part related to the present invention, which is superimposed on the shapes 30, 31, and 32 of unprocessed eyeglass lenses with different external shapes, and the rim shapes of the left and right frames (this is substantially the same as the processed lens shape). ) 33.34 is displayed. At this time, the display is performed based on the position of the frame with respect to the unprocessed lens calculated by the central processing unit 20 (the optical center of the unprocessed eyeglass lens matches the position of the optical center of the eyeglass lens fitted to the frame). It will be done.

In the example shown in Figure 3, so that the confirmation work can be done visually,
The lens outline is shown in the real child, and the unprocessed lens 30.31.
At 32, its diameter is displayed numerically. Therefore, it is possible to confirm whether or not the processing has been reliably performed by placing the unprocessed lens with markings on it against the display surface. Further, in the example shown in FIG. 3, the central processing unit 20 calculates the maximum and minimum diameters of the lens size required for processing from the frame data, and displays the results numerically.

The fabricator uses the glasses wearer's prescription value and the display in Figures 2 and 3 obtained from the frame data to check the lens diameter required for fitting and the actual position of the eye, and input the prescription. It is also possible to prevent mistakes before processing.

After making these checks, an unprocessed lens with an appropriate diameter is set in the lens processing device 1, and a data transmission signal is input to the central processing unit 20 according to an instruction from the input device 23. As a result, a lens matching the prescription as shown in FIG. 2 will be processed.

[Effects of the Invention] As described below, according to the present invention, even an unskilled person can easily select the raw eyeglass lens diameter by simply inputting the prescription value from the patient's prescription into the device. can.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram showing an example of a display screen of a display device, FIG. 3 is a diagram showing an example of a display screen related to selection of a raw eyeglass lens diameter, It is. [Explanation of symbols of important parts] 20...Central processing unit, 21...Display device, 22.
. . . Storage device, 23 . . . Input device, 3 . . . Frame shape measuring device.

Claims (1)

[Claims] A frame shape measuring device that measures a frame shape and creates numerical data of the frame shape; a storage device that stores the frame shape as numerical data; In addition to inputting data, an instruction signal instructing to obtain frame shape data using the frame shape measuring device, or a selection signal of numerical data of a desired frame shape selected from the storage device is inputted. an input device; a calculation means for calculating a position of a lens center to obtain position data from data on a frame shape obtained by an instruction from the input device, and data on an interpupillary distance and a prism from the input device; a display device that displays the center position of the unprocessed eyeglass lens and its actual size outer shape by superimposing it on the actual size frame image from the frame shape data obtained by the instruction and the lens center position data. A device for selecting the diameter of unprocessed eyeglass lenses.