FR802512A - Luminous electric device for measuring exposure times with several measurement fields - Google Patents

Luminous electric device for measuring exposure times with several measurement fields

Info

Publication number
FR802512A
FR802512A FR802512DA FR802512A FR 802512 A FR802512 A FR 802512A FR 802512D A FR802512D A FR 802512DA FR 802512 A FR802512 A FR 802512A
Authority
FR
France
Prior art keywords
electric device
exposure times
several measurement
measurement fields
luminous electric
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
French (fr)
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.)
Metrawatt AG
Original Assignee
Metrawatt 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 Metrawatt AG filed Critical Metrawatt AG
Application granted granted Critical
Publication of FR802512A publication Critical patent/FR802512A/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
    • G01J1/4209—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)
FR802512D 1935-03-02 1936-03-02 Luminous electric device for measuring exposure times with several measurement fields Expired FR802512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE802512X 1935-03-02

Publications (1)

Publication Number Publication Date
FR802512A true FR802512A (en) 1936-09-07

Family

ID=6719036

Family Applications (1)

Application Number Title Priority Date Filing Date
FR802512D Expired FR802512A (en) 1935-03-02 1936-03-02 Luminous electric device for measuring exposure times with several measurement fields

Country Status (1)

Country Link
FR (1) FR802512A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE894197C (en) * 1942-12-17 1953-10-22 Michael Maul Photo camera with automatic exposure control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE894197C (en) * 1942-12-17 1953-10-22 Michael Maul Photo camera with automatic exposure control

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