GB2352823B - Photometering apparatus - Google Patents

Photometering apparatus

Info

Publication number
GB2352823B
GB2352823B GB0023452A GB0023452A GB2352823B GB 2352823 B GB2352823 B GB 2352823B GB 0023452 A GB0023452 A GB 0023452A GB 0023452 A GB0023452 A GB 0023452A GB 2352823 B GB2352823 B GB 2352823B
Authority
GB
United Kingdom
Prior art keywords
photometering apparatus
photometering
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 - Fee Related
Application number
GB0023452A
Other versions
GB2352823A (en
GB0023452D0 (en
Inventor
Isamu Hirai
Tadahisa Ohkura
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 JP29677697A external-priority patent/JP3586365B2/en
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB0023452D0 publication Critical patent/GB0023452D0/en
Publication of GB2352823A publication Critical patent/GB2352823A/en
Application granted granted Critical
Publication of GB2352823B publication Critical patent/GB2352823B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera
    • G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
    • G03B7/0997—Through the lens [TTL] measuring
    • G03B7/09971—Through the lens [TTL] measuring in mirror-reflex cameras
    • G03B7/09976—Through the lens [TTL] measuring in mirror-reflex cameras the sensor being mounted in, before, or behind the porro-prism
    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera
    • G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
    • G03B7/0997—Through the lens [TTL] measuring
    • G03B7/09979—Multi-zone light measuring

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
GB0023452A 1997-10-29 1998-10-29 Photometering apparatus Expired - Fee Related GB2352823B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP29677697A JP3586365B2 (en) 1997-10-29 1997-10-29 Photometric device
GB9823715A GB2331158B (en) 1997-10-29 1998-10-29 Photometering apparatus

Publications (3)

Publication Number Publication Date
GB0023452D0 GB0023452D0 (en) 2000-11-08
GB2352823A GB2352823A (en) 2001-02-07
GB2352823B true GB2352823B (en) 2001-08-15

Family

ID=26314586

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0023452A Expired - Fee Related GB2352823B (en) 1997-10-29 1998-10-29 Photometering apparatus

Country Status (1)

Country Link
GB (1) GB2352823B (en)

Also Published As

Publication number Publication date
GB2352823A (en) 2001-02-07
GB0023452D0 (en) 2000-11-08

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20071029