GB1397482A - Photoelectric exposure meter - Google Patents

Photoelectric exposure meter

Info

Publication number
GB1397482A
GB1397482A GB4471473A GB4471473A GB1397482A GB 1397482 A GB1397482 A GB 1397482A GB 4471473 A GB4471473 A GB 4471473A GB 4471473 A GB4471473 A GB 4471473A GB 1397482 A GB1397482 A GB 1397482A
Authority
GB
United Kingdom
Prior art keywords
voltage
exposure
resistors
diode
source
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
GB4471473A
Other languages
English (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
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB1397482A publication Critical patent/GB1397482A/en
Expired 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
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
    • G01J1/1626—Arrangements with two photodetectors, the signals of which are compared
    • 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
    • G01J1/44—Electric circuits
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
GB4471473A 1972-10-12 1973-09-24 Photoelectric exposure meter Expired GB1397482A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972118142U JPS5426067Y2 (nl) 1972-10-12 1972-10-12

Publications (1)

Publication Number Publication Date
GB1397482A true GB1397482A (en) 1975-06-11

Family

ID=14729096

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4471473A Expired GB1397482A (en) 1972-10-12 1973-09-24 Photoelectric exposure meter

Country Status (4)

Country Link
JP (1) JPS5426067Y2 (nl)
FR (1) FR2203072B1 (nl)
GB (1) GB1397482A (nl)
NL (1) NL164963C (nl)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5025336B1 (nl) * 1967-11-28 1975-08-22

Also Published As

Publication number Publication date
JPS4974276U (nl) 1974-06-27
NL164963B (nl) 1980-09-15
NL7313166A (nl) 1974-04-16
DE2351420B2 (de) 1976-01-29
DE2351420A1 (de) 1974-04-25
JPS5426067Y2 (nl) 1979-08-29
FR2203072A1 (nl) 1974-05-10
NL164963C (nl) 1981-02-16
FR2203072B1 (nl) 1976-06-18

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Legal Events

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