JPS56123505A - Method for detecting focus of optical lens - Google Patents

Method for detecting focus of optical lens

Info

Publication number
JPS56123505A
JPS56123505A JP2659580A JP2659580A JPS56123505A JP S56123505 A JPS56123505 A JP S56123505A JP 2659580 A JP2659580 A JP 2659580A JP 2659580 A JP2659580 A JP 2659580A JP S56123505 A JPS56123505 A JP S56123505A
Authority
JP
Japan
Prior art keywords
focus
circuit
plane
lens
constitution
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.)
Pending
Application number
JP2659580A
Other languages
Japanese (ja)
Inventor
Takeshi Koo
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP2659580A priority Critical patent/JPS56123505A/en
Publication of JPS56123505A publication Critical patent/JPS56123505A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To make the detection of focus easy and to simplify the constitution and assembly of the device, by moving the photoelectric plane near the focus with the lens to be inspected for the light transmitted through an objective plate along the optical axis and detecting the output and displacement of the photoelectric plane for operational processing. CONSTITUTION:The light from a light source 1 via the lens 2 passes through an objective plate 3 having pin holes and the image of it is formed near the photodetecting plane 91 consisting of e.g. CCD through the collimator lens 4 and lens 6 to be inspected. The focus plate 9 supporting the photodetecting plane 91 is finely moved back and forth on the optical axis via the feed mechanism consisting of the thimble 83 and spindle 82 linked with the motor 84. The extent of movement is stored in the memory circuit 12 via an ADD conversion circuit 85, and address circuit 13. Further, the detection signal of the photodetecting plane 91 is stored in the memory 12 via an amplifier 10 and sensitivity adjusting circuit 11, and the position of focus is displayed via the control circuit 16 and a retrieval circuit 14. Thus, the detection of focus is made easy, and the constitution and assembly of the device can be made easy.
JP2659580A 1980-03-05 1980-03-05 Method for detecting focus of optical lens Pending JPS56123505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2659580A JPS56123505A (en) 1980-03-05 1980-03-05 Method for detecting focus of optical lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2659580A JPS56123505A (en) 1980-03-05 1980-03-05 Method for detecting focus of optical lens

Publications (1)

Publication Number Publication Date
JPS56123505A true JPS56123505A (en) 1981-09-28

Family

ID=12197876

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2659580A Pending JPS56123505A (en) 1980-03-05 1980-03-05 Method for detecting focus of optical lens

Country Status (1)

Country Link
JP (1) JPS56123505A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5937510A (en) * 1982-08-27 1984-03-01 Sony Corp Autofocus device
EP0624783A2 (en) * 1993-05-14 1994-11-17 Fuji Photo Film Co., Ltd. Lens inspector
JP2002148694A (en) * 2000-11-07 2002-05-22 Asahi Optical Co Ltd Lens focal position adjusting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51105722A (en) * 1975-03-14 1976-09-18 Yokogawa Electric Works Ltd
JPS5461922A (en) * 1977-10-26 1979-05-18 Toshihiko Kotsukawa Automatic focusing controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51105722A (en) * 1975-03-14 1976-09-18 Yokogawa Electric Works Ltd
JPS5461922A (en) * 1977-10-26 1979-05-18 Toshihiko Kotsukawa Automatic focusing controller

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5937510A (en) * 1982-08-27 1984-03-01 Sony Corp Autofocus device
EP0624783A2 (en) * 1993-05-14 1994-11-17 Fuji Photo Film Co., Ltd. Lens inspector
EP0624783A3 (en) * 1993-05-14 1995-04-26 Fuji Photo Film Co Ltd Lens inspector.
US5574555A (en) * 1993-05-14 1996-11-12 Fuji Photo Film Co., Ltd. Lens inspection method and apparatus
JP2002148694A (en) * 2000-11-07 2002-05-22 Asahi Optical Co Ltd Lens focal position adjusting device

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