GB1258300A - - Google Patents

Info

Publication number
GB1258300A
GB1258300A GB1258300DA GB1258300A GB 1258300 A GB1258300 A GB 1258300A GB 1258300D A GB1258300D A GB 1258300DA GB 1258300 A GB1258300 A GB 1258300A
Authority
GB
United Kingdom
Prior art keywords
bridge circuit
lamps
bridge
balance
balanced condition
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
Other languages
English (en)
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 filed Critical
Publication of GB1258300A publication Critical patent/GB1258300A/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
    • G01J1/42—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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/18—Signals indicating condition of a camera member or suitability of light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
GB1258300D 1968-02-10 1969-01-29 Expired GB1258300A (https=)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP829668 1968-02-10

Publications (1)

Publication Number Publication Date
GB1258300A true GB1258300A (https=) 1971-12-30

Family

ID=11689182

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1258300D Expired GB1258300A (https=) 1968-02-10 1969-01-29

Country Status (3)

Country Link
US (1) US3594088A (https=)
DE (1) DE1906201C3 (https=)
GB (1) GB1258300A (https=)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724955A (en) * 1970-07-07 1973-04-03 Yashica Co Ltd Discrimination circuit of physical quantities
JPS5038332B1 (https=) * 1971-05-04 1975-12-09
US3836262A (en) * 1971-07-07 1974-09-17 Minolta Camera Kk Indicator circuit
US3765006A (en) * 1972-02-22 1973-10-09 Yashica Co Ltd Level detection circuit
JPS5834424Y2 (ja) * 1973-09-06 1983-08-02 京セラ株式会社 デンキシヤツタカイロ
JPS5175443A (en) * 1974-12-25 1976-06-30 Bell & Howell Japan Roshutsubusokuhyoji oyobi fueedojokyohyojisochi
DD129683B1 (de) * 1977-01-31 1980-10-01 Pentacon Dresden Veb Belichtungsmessschaltung
GB1580403A (en) * 1977-04-19 1980-12-03 Philips Electronic Associated Pyroelectric detector circuits and devices

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH383763A (de) * 1959-12-04 1964-10-31 Zeiss Ikon Ag Kamera, insbesondere Schmalfilmkamera
US3452656A (en) * 1964-10-31 1969-07-01 Zeiss Ikon Ag Photometer with photoelectric transformer
US3489499A (en) * 1965-12-27 1970-01-13 Polaroid Corp Photographic photometric apparatus
CH467445A (de) * 1967-02-25 1969-01-15 Gossen & Co Gmbh P Fotoelektrischer Belichtungsmesser
FR1544256A (fr) * 1967-06-06 1968-10-31 Gossen & Co Gmbh P Posemètre électronique

Also Published As

Publication number Publication date
DE1906201B2 (de) 1974-11-28
DE1906201A1 (de) 1969-08-21
US3594088A (en) 1971-07-20
DE1906201C3 (de) 1975-07-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee