GB1555527A - Focus decting in a singlelens reflex camera - Google Patents

Focus decting in a singlelens reflex camera

Info

Publication number
GB1555527A
GB1555527A GB3679276A GB3679276A GB1555527A GB 1555527 A GB1555527 A GB 1555527A GB 3679276 A GB3679276 A GB 3679276A GB 3679276 A GB3679276 A GB 3679276A GB 1555527 A GB1555527 A GB 1555527A
Authority
GB
United Kingdom
Prior art keywords
decting
focus
reflex camera
singlelens
singlelens reflex
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
GB3679276A
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 JP10911475A external-priority patent/JPS5233527A/en
Priority claimed from JP11678675A external-priority patent/JPS593733B2/en
Priority claimed from JP13225875U external-priority patent/JPS5245446U/ja
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority claimed from GB40299/77A external-priority patent/GB1571708A/en
Publication of GB1555527A publication Critical patent/GB1555527A/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
    • G02B7/34—Systems for automatic generation of focusing signals using different areas in a pupil plane
    • G02B7/343—Systems for automatic generation of focusing signals using different areas in a pupil plane using light beam separating prisms
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
GB3679276A 1975-09-09 1976-09-06 Focus decting in a singlelens reflex camera Expired GB1555527A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP10911475A JPS5233527A (en) 1975-09-09 1975-09-09 Single lens reflex camera
JP11678675A JPS593733B2 (en) 1975-09-26 1975-09-26 Ichigun reflex camera no.
JP13225875U JPS5245446U (en) 1975-09-27 1975-09-27
GB40299/77A GB1571708A (en) 1975-09-09 1976-09-06 Single lens reflex camera including a focus detecting device

Publications (1)

Publication Number Publication Date
GB1555527A true GB1555527A (en) 1979-11-14

Family

ID=27448942

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3679276A Expired GB1555527A (en) 1975-09-09 1976-09-06 Focus decting in a singlelens reflex camera

Country Status (1)

Country Link
GB (1) GB1555527A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3401798A1 (en) * 1983-01-21 1984-07-26 Fuji Electric Co., Ltd., Kawasaki, Kanagawa Rangefinder
GB2183419A (en) * 1985-10-22 1987-06-03 Canon Kk Focus determination
GB2178621B (en) * 1985-06-28 1990-03-14 Canon Kk Focus detecting device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3401798A1 (en) * 1983-01-21 1984-07-26 Fuji Electric Co., Ltd., Kawasaki, Kanagawa Rangefinder
GB2137450A (en) * 1983-01-21 1984-10-03 Konishiroku Photo Ind Range finder
GB2178621B (en) * 1985-06-28 1990-03-14 Canon Kk Focus detecting device
GB2183419A (en) * 1985-10-22 1987-06-03 Canon Kk Focus determination
US4859842A (en) * 1985-10-22 1989-08-22 Canon Kabushiki Kaisha Multi-directional focus state detection apparatus
GB2183419B (en) * 1985-10-22 1990-08-29 Canon Kk Focusing state detection apparatus for objective lens

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Legal Events

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

Effective date: 19940906