JPS6448012A - Focusing device for video camera or the like - Google Patents

Focusing device for video camera or the like

Info

Publication number
JPS6448012A
JPS6448012A JP62204033A JP20403387A JPS6448012A JP S6448012 A JPS6448012 A JP S6448012A JP 62204033 A JP62204033 A JP 62204033A JP 20403387 A JP20403387 A JP 20403387A JP S6448012 A JPS6448012 A JP S6448012A
Authority
JP
Japan
Prior art keywords
focusing
circuit
resistor
lens
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP62204033A
Other languages
Japanese (ja)
Other versions
JP2686746B2 (en
Inventor
Toshio Murakami
Takashi Azumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62204033A priority Critical patent/JP2686746B2/en
Priority to US07/233,011 priority patent/US5003400A/en
Priority to KR1019880010568A priority patent/KR920005681B1/en
Priority to DE3828284A priority patent/DE3828284C2/en
Publication of JPS6448012A publication Critical patent/JPS6448012A/en
Application granted granted Critical
Publication of JP2686746B2 publication Critical patent/JP2686746B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Lens Barrels (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To smoothly execute focusing with high accuracy by controlling delicately the position of a focusing lens by allowing it to correspond to the position of a valuable resistor for manual focus. CONSTITUTION:The focusing device is constituted of a lens 1, an image pickup element 2, a camera circuit 3, an auto focus signal generating circuit 4, a deciding circuit 5 for a motor moving direction, focusing, namely, a motor stop, etc., a comparator circuit 6 for detecting the error quantity, a manual/auto changeover switch circuit 7, a focusing motor control circuit 8, a motor driving circuit 9, a focusing motor 10, a potentiometer 11 for detecting a position of a focusing lens, and a variable resistor 12 being a manual focus adjusting means. According to such a constitution, at the time of adjusting a focus manually, the switch 7 is selected to the M side and an auto focus circuit consisting of the circuit 4 and 5 is detected, and the lens 1 is stopped exactly at a distance determined by the movable position of the resistor 12. In such a way, focusing can be executed by only operating the resistor 12.
JP62204033A 1987-08-19 1987-08-19 Focusing device such as video camera Expired - Lifetime JP2686746B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP62204033A JP2686746B2 (en) 1987-08-19 1987-08-19 Focusing device such as video camera
US07/233,011 US5003400A (en) 1987-08-19 1988-08-17 Focusing apparatus of video camera or the like
KR1019880010568A KR920005681B1 (en) 1987-08-19 1988-08-19 Focusing apparatus of video camera or like
DE3828284A DE3828284C2 (en) 1987-08-19 1988-08-19 Focusing device for a camera and a method for operating this device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62204033A JP2686746B2 (en) 1987-08-19 1987-08-19 Focusing device such as video camera

Publications (2)

Publication Number Publication Date
JPS6448012A true JPS6448012A (en) 1989-02-22
JP2686746B2 JP2686746B2 (en) 1997-12-08

Family

ID=16483642

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62204033A Expired - Lifetime JP2686746B2 (en) 1987-08-19 1987-08-19 Focusing device such as video camera

Country Status (1)

Country Link
JP (1) JP2686746B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100293414B1 (en) * 1993-07-15 2001-10-24 구자홍 Focus mode automatic switching apparatus for camera recorder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4819897U (en) * 1971-07-19 1973-03-06
JPS5964816A (en) * 1982-10-05 1984-04-12 Olympus Optical Co Ltd Lens barrel
JPS6091310A (en) * 1983-10-26 1985-05-22 Olympus Optical Co Ltd Lens position setting driver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4819897U (en) * 1971-07-19 1973-03-06
JPS5964816A (en) * 1982-10-05 1984-04-12 Olympus Optical Co Ltd Lens barrel
JPS6091310A (en) * 1983-10-26 1985-05-22 Olympus Optical Co Ltd Lens position setting driver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100293414B1 (en) * 1993-07-15 2001-10-24 구자홍 Focus mode automatic switching apparatus for camera recorder

Also Published As

Publication number Publication date
JP2686746B2 (en) 1997-12-08

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term