FR862770A - Photomètre - Google Patents

Photomètre

Info

Publication number
FR862770A
FR862770A FR862770DA FR862770A FR 862770 A FR862770 A FR 862770A FR 862770D A FR862770D A FR 862770DA FR 862770 A FR862770 A FR 862770A
Authority
FR
France
Prior art keywords
photometer
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.)
Weston Electric Instrument Corp
Original Assignee
Weston Electric Instrument Corp
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 Weston Electric Instrument Corp filed Critical Weston Electric Instrument Corp
Application granted granted Critical
Publication of FR862770A publication Critical patent/FR862770A/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
    • 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)
FR862770D 1939-01-14 1940-01-06 Photomètre Expired FR862770A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US862770XA 1939-01-14 1939-01-14

Publications (1)

Publication Number Publication Date
FR862770A true FR862770A (fr) 1941-03-14

Family

ID=22197481

Family Applications (1)

Application Number Title Priority Date Filing Date
FR862770D Expired FR862770A (fr) 1939-01-14 1940-01-06 Photomètre

Country Status (1)

Country Link
FR (1) FR862770A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1141093B (de) * 1956-05-11 1962-12-13 Rollei Werke Franke Heidecke Photoelektrischer Belichtungsmesser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1141093B (de) * 1956-05-11 1962-12-13 Rollei Werke Franke Heidecke Photoelektrischer Belichtungsmesser

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