GB2047037B - Focus detecting system - Google Patents

Focus detecting system

Info

Publication number
GB2047037B
GB2047037B GB8004788A GB8004788A GB2047037B GB 2047037 B GB2047037 B GB 2047037B GB 8004788 A GB8004788 A GB 8004788A GB 8004788 A GB8004788 A GB 8004788A GB 2047037 B GB2047037 B GB 2047037B
Authority
GB
United Kingdom
Prior art keywords
detecting system
focus detecting
focus
detecting
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.)
Expired
Application number
GB8004788A
Other versions
GB2047037A (en
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co 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
Priority claimed from JP1525579A external-priority patent/JPS55108629A/en
Priority claimed from JP1525679A external-priority patent/JPS55108630A/en
Priority claimed from JP1525779A external-priority patent/JPS55108631A/en
Priority claimed from JP1694879A external-priority patent/JPS55110228A/en
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB2047037A publication Critical patent/GB2047037A/en
Application granted granted Critical
Publication of GB2047037B publication Critical patent/GB2047037B/en
Expired 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
    • G02B7/38—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals measured at different points on the optical axis, e.g. focussing on two or more planes and comparing image data
    • 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
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/005—Blur detection
GB8004788A 1979-02-13 1980-02-13 Focus detecting system Expired GB2047037B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1525579A JPS55108629A (en) 1979-02-13 1979-02-13 Focus detector of camera
JP1525679A JPS55108630A (en) 1979-02-13 1979-02-13 Focus detector of camera
JP1525779A JPS55108631A (en) 1979-02-13 1979-02-13 Focus detector of camera
JP1694879A JPS55110228A (en) 1979-02-16 1979-02-16 Focus detector of camera

Publications (2)

Publication Number Publication Date
GB2047037A GB2047037A (en) 1980-11-19
GB2047037B true GB2047037B (en) 1983-11-23

Family

ID=27456351

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8004788A Expired GB2047037B (en) 1979-02-13 1980-02-13 Focus detecting system

Country Status (3)

Country Link
DE (1) DE3005044C2 (en)
FR (1) FR2449293A1 (en)
GB (1) GB2047037B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3049233C2 (en) * 1979-12-27 1988-01-21 Asahi Kogaku Kogyo K.K., Tokyo Photographic camera with automatic focus
DE3142133A1 (en) * 1980-10-23 1982-05-27 Ricoh Co., Ltd., Tokyo Automatic focusing system
GB2195214B (en) * 1980-12-10 1988-10-26 Emi Ltd Automatic focussing system for an optical system
DE3103154A1 (en) * 1981-01-30 1982-08-26 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR BINARY CODING OF THE SENSOR SIGNALS OF A MULTIPLE NUMBER OF OPTOELECTRONIC SENSOR ELEMENTS AND METHOD FOR THEIR OPERATION
US4432620A (en) * 1981-03-13 1984-02-21 Ricoh Co., Ltd. Lens motor drive device in automatic focusing camera
US4432622A (en) * 1981-06-16 1984-02-21 Ricoh Company, Ltd. Focusing-position-detection circuit
JPS5843409A (en) * 1981-09-10 1983-03-14 Asahi Optical Co Ltd Detection of focusing position
AU554186B2 (en) * 1981-10-26 1986-08-14 Sony Corporation Apparatus for detecting distance to an object
US4498754A (en) 1982-01-25 1985-02-12 Ricoh Company, Ltd. Single lens reflex camera
JPS58153327A (en) * 1982-03-08 1983-09-12 Toshiba Corp Inspecting device for pattern
JPS58211721A (en) * 1982-06-04 1983-12-09 Olympus Optical Co Ltd Focusing detecting method
GB2129642B (en) * 1982-11-05 1986-09-10 British Library Board Focus detection
JP2002287017A (en) 2001-03-28 2002-10-03 Fuji Photo Optical Co Ltd Focusing state detecting device for photographic lens

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5379531A (en) * 1976-12-24 1978-07-14 Nippon Chemical Ind Matched focal point detection device
FR2386832A1 (en) * 1977-04-05 1978-11-03 Commissariat Energie Atomique AUTOMATIC CORRECTION PROCEDURE FOR FOCUSING A MICROSCOPE AND A DEVICE IMPLEMENTING THIS PROCEDURE
JPS53166637U (en) * 1977-06-02 1978-12-27
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
DE2836428A1 (en) * 1978-08-19 1980-03-06 Battelle Institut E V Automatic focussing system with light-sensitive CCD elements - compares illumination differences to form difference signal for controlling motor assigned to lens

Also Published As

Publication number Publication date
DE3005044A1 (en) 1980-08-14
FR2449293A1 (en) 1980-09-12
DE3005044C2 (en) 1984-09-20
FR2449293B1 (en) 1984-11-30
GB2047037A (en) 1980-11-19

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980213