JPS5689028A - Photometry device - Google Patents

Photometry device

Info

Publication number
JPS5689028A
JPS5689028A JP16669179A JP16669179A JPS5689028A JP S5689028 A JPS5689028 A JP S5689028A JP 16669179 A JP16669179 A JP 16669179A JP 16669179 A JP16669179 A JP 16669179A JP S5689028 A JPS5689028 A JP S5689028A
Authority
JP
Japan
Prior art keywords
screen
resistances
photometry
weights
respective parts
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.)
Pending
Application number
JP16669179A
Other languages
Japanese (ja)
Inventor
Kenji Nakauchi
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP16669179A priority Critical patent/JPS5689028A/en
Priority to US06/218,561 priority patent/US4420252A/en
Publication of JPS5689028A publication Critical patent/JPS5689028A/en
Pending 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/28—Circuitry to measure or to take account of the object contrast
    • 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
    • G03B7/09979—Multi-zone light measuring

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE:To perform weighting freely and easily according to positions of a screen, by connecting resistances, having resistance values corresponding to weights of screen positions, in series to photodetectors which provide photometry at respective parts. CONSTITUTION:Many photodetectors, e.g. photodiodes 8a-8p are connected at their anodes to resistances 12a-12p. Their weights are determined on the basis of the appearance probability of an object, the lowering of the quantity of circumferential light of a lens, etc. Series circuits of diodes 8a-8p and resistances 12a-12p are connected in parallel to the one-side input terminal of operational amplifier 13, and resistance 14 is connected to the feedback circuit of amplifier 13. Consequently, respective parts of the screen is desirably weighted to perform the photometry.
JP16669179A 1979-12-21 1979-12-21 Photometry device Pending JPS5689028A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP16669179A JPS5689028A (en) 1979-12-21 1979-12-21 Photometry device
US06/218,561 US4420252A (en) 1979-12-21 1980-12-22 Light measuring device for controlling exposure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16669179A JPS5689028A (en) 1979-12-21 1979-12-21 Photometry device

Publications (1)

Publication Number Publication Date
JPS5689028A true JPS5689028A (en) 1981-07-20

Family

ID=15835945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16669179A Pending JPS5689028A (en) 1979-12-21 1979-12-21 Photometry device

Country Status (1)

Country Link
JP (1) JPS5689028A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61203937A (en) * 1985-03-05 1986-09-09 キヤノン株式会社 Eyeground camera

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61203937A (en) * 1985-03-05 1986-09-09 キヤノン株式会社 Eyeground camera
JPH024288B2 (en) * 1985-03-05 1990-01-26 Canon Kk

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