JPS57154206A - Focusing device - Google Patents

Focusing device

Info

Publication number
JPS57154206A
JPS57154206A JP56038447A JP3844781A JPS57154206A JP S57154206 A JPS57154206 A JP S57154206A JP 56038447 A JP56038447 A JP 56038447A JP 3844781 A JP3844781 A JP 3844781A JP S57154206 A JPS57154206 A JP S57154206A
Authority
JP
Japan
Prior art keywords
lens
signal
focusing
irradiating direction
satisfactorily
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
JP56038447A
Other languages
Japanese (ja)
Other versions
JPH0526176B2 (en
Inventor
Tatsuo Inoue
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP56038447A priority Critical patent/JPS57154206A/en
Priority to CA000397160A priority patent/CA1173284A/en
Priority to KR8201605A priority patent/KR890001454B1/en
Priority to FR8204034A priority patent/FR2502354B1/en
Priority to AT0102382A priority patent/AT376813B/en
Priority to NL8201070A priority patent/NL8201070A/en
Priority to GB8207558A priority patent/GB2095505A/en
Priority to DE19823209517 priority patent/DE3209517A1/en
Publication of JPS57154206A publication Critical patent/JPS57154206A/en
Publication of JPH0526176B2 publication Critical patent/JPH0526176B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • 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
    • G02B7/282—Autofocusing of zoom lenses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Character Input (AREA)
  • Accessories Of Cameras (AREA)

Abstract

PURPOSE: To always execute focusing exactly and satisfactorily, by constituting so that a reflected ray from an object to be photographed, irradiated by a light source whose irradiating direction is varied on the surface containing an optical axis of a lens system is detected by a photodetecting part through a focusing lens and a zoom system.
CONSTITUTION: For instance, in a TV camera having a zoom lens, a light source part 4 is made to emit light by a signal from a signal processing circuit 7, and also the irradiating direction of the light beam is gradually varied toward the inside from the direction being in parallel with an optical axis of a lens 1. A reflected ray from an object to be photographed 6 is made incident to the lens 1, passes through a zoom system 8, is reflected by a half mirror 9 and is made incident to a photodetecting part 5. A signal corresponding to an angle of the irradiating direction is applied to the processing circuit 7, the distance is measured, and by its signal, the focus of the lens 1 is controlled through a driving part 3. In this way, the focusing is executed exactly and satisfactorily at all times.
COPYRIGHT: (C)1982,JPO&Japio
JP56038447A 1981-03-17 1981-03-17 Focusing device Granted JPS57154206A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP56038447A JPS57154206A (en) 1981-03-17 1981-03-17 Focusing device
CA000397160A CA1173284A (en) 1981-03-17 1982-02-26 Auto focus system
KR8201605A KR890001454B1 (en) 1981-03-17 1982-03-09 Auto focus system
FR8204034A FR2502354B1 (en) 1981-03-17 1982-03-10 AUTOMATIC FOCUSING INSTALLATION FOR A CAMERA SUCH AS A VARIABLE FOCAL TELEVISION CAMERA
AT0102382A AT376813B (en) 1981-03-17 1982-03-15 AUTOMATIC FOCUSING SYSTEM
NL8201070A NL8201070A (en) 1981-03-17 1982-03-15 SYSTEM FOR AUTOMATIC FOCUSING OF AN IMAGE RECORDING LENS.
GB8207558A GB2095505A (en) 1981-03-17 1982-03-16 Automatic focusing
DE19823209517 DE3209517A1 (en) 1981-03-17 1982-03-16 AUTOMATIC FOCUSING SYSTEM FOR A PHOTOGRAPHIC CAMERA USING THIS SYSTEM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56038447A JPS57154206A (en) 1981-03-17 1981-03-17 Focusing device

Publications (2)

Publication Number Publication Date
JPS57154206A true JPS57154206A (en) 1982-09-24
JPH0526176B2 JPH0526176B2 (en) 1993-04-15

Family

ID=12525538

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56038447A Granted JPS57154206A (en) 1981-03-17 1981-03-17 Focusing device

Country Status (8)

Country Link
JP (1) JPS57154206A (en)
KR (1) KR890001454B1 (en)
AT (1) AT376813B (en)
CA (1) CA1173284A (en)
DE (1) DE3209517A1 (en)
FR (1) FR2502354B1 (en)
GB (1) GB2095505A (en)
NL (1) NL8201070A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5995336U (en) * 1982-12-17 1984-06-28 ソニー株式会社 Video camera
US4801963A (en) * 1985-12-18 1989-01-31 Canon Kabushiki Kaisha Focus detecting system
US5305047A (en) * 1988-10-11 1994-04-19 Canon Kabushiki Kaisha Pattern projector having a multi-portion projection lens and camera comprising the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3310601C2 (en) * 1982-03-24 1994-02-10 Canon Kk Distance measuring device
JPS606114U (en) * 1983-06-24 1985-01-17 キヤノン株式会社 focus detection device
KR102093637B1 (en) * 2017-10-20 2020-03-27 전자부품연구원 Lidar device and system comprising the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51120725A (en) * 1975-04-16 1976-10-22 Sankyo Kogaku Kogyo Kk Automatic forcusing camera
JPS5262022A (en) * 1975-11-17 1977-05-23 Bell & Howell Co Closed loop automatic focusing system
JPS54155832A (en) * 1978-05-30 1979-12-08 Canon Inc Focusing detector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759614A (en) * 1971-02-10 1973-09-18 Eastman Kodak Co Dual photocell range finder apparatus
US4083056A (en) * 1975-09-09 1978-04-04 Asahi Kogaku Kogyo Kabushiki Kaisha Focus detecting device for single-lens reflex cameras
FR2396325A1 (en) * 1977-07-01 1979-01-26 Olympus Optical Co Automatic focussing system for an optical instrument - assesses smoothness of brightness change between scanned adjacent image elements to produce control signal for optical system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51120725A (en) * 1975-04-16 1976-10-22 Sankyo Kogaku Kogyo Kk Automatic forcusing camera
JPS5262022A (en) * 1975-11-17 1977-05-23 Bell & Howell Co Closed loop automatic focusing system
JPS54155832A (en) * 1978-05-30 1979-12-08 Canon Inc Focusing detector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5995336U (en) * 1982-12-17 1984-06-28 ソニー株式会社 Video camera
JPH0334726Y2 (en) * 1982-12-17 1991-07-23
US4801963A (en) * 1985-12-18 1989-01-31 Canon Kabushiki Kaisha Focus detecting system
US5305047A (en) * 1988-10-11 1994-04-19 Canon Kabushiki Kaisha Pattern projector having a multi-portion projection lens and camera comprising the same

Also Published As

Publication number Publication date
KR890001454B1 (en) 1989-05-03
ATA102382A (en) 1984-05-15
GB2095505A (en) 1982-09-29
JPH0526176B2 (en) 1993-04-15
FR2502354B1 (en) 1985-06-21
CA1173284A (en) 1984-08-28
KR830009501A (en) 1983-12-21
DE3209517A1 (en) 1982-10-14
AT376813B (en) 1985-01-10
FR2502354A1 (en) 1982-09-24
NL8201070A (en) 1982-10-18

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