FR859170A - Posemètre photoélectrique - Google Patents

Posemètre photoélectrique

Info

Publication number
FR859170A
FR859170A FR859170DA FR859170A FR 859170 A FR859170 A FR 859170A FR 859170D A FR859170D A FR 859170DA FR 859170 A FR859170 A FR 859170A
Authority
FR
France
Prior art keywords
light meter
photoelectric light
photoelectric
meter
light
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)
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
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 Zeiss Ikon AG filed Critical Zeiss Ikon AG
Application granted granted Critical
Publication of FR859170A publication Critical patent/FR859170A/fr
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
    • G01J1/4209—Photoelectric exposure meters for determining the exposure time in recording or reproducing
    • G01J1/4214—Photoelectric exposure meters for determining the exposure time in recording or reproducing specially adapted for view-taking apparatus

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR859170D 1938-09-08 1939-08-18 Posemètre photoélectrique Expired FR859170A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE859170X 1938-09-08

Publications (1)

Publication Number Publication Date
FR859170A true FR859170A (fr) 1940-12-12

Family

ID=6790046

Family Applications (1)

Application Number Title Priority Date Filing Date
FR859170D Expired FR859170A (fr) 1938-09-08 1939-08-18 Posemètre photoélectrique

Country Status (1)

Country Link
FR (1) FR859170A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648254A (en) * 1947-09-30 1953-08-11 Gen Electric Logarithmic exposure meter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648254A (en) * 1947-09-30 1953-08-11 Gen Electric Logarithmic exposure meter

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