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FR844988A - Perfectionnements aux pose-mètres - Google Patents

Perfectionnements aux pose-mètres

Info

Publication number
FR844988A
FR844988A FR844988DA FR844988A FR 844988 A FR844988 A FR 844988A FR 844988D A FR844988D A FR 844988DA FR 844988 A FR844988 A FR 844988A
Authority
FR
France
Prior art keywords
pose
meters
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR844988A publication Critical patent/FR844988A/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)
  • Indication In Cameras, And Counting Of Exposures (AREA)
FR844988D 1937-10-23 1938-10-21 Perfectionnements aux pose-mètres Expired FR844988A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US170665A US2175027A (en) 1937-10-23 1937-10-23 Exposure meter

Publications (1)

Publication Number Publication Date
FR844988A true FR844988A (fr) 1939-08-07

Family

ID=22620799

Family Applications (1)

Application Number Title Priority Date Filing Date
FR844988D Expired FR844988A (fr) 1937-10-23 1938-10-21 Perfectionnements aux pose-mètres

Country Status (2)

Country Link
US (1) US2175027A (fr)
FR (1) FR844988A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766654A (en) * 1947-09-30 1956-10-16 Gen Electric Exposure meter with incident light attachment
US2700916A (en) * 1951-06-06 1955-02-01 Samuel A Muirhead Device for restricting light acceptance angles for light meters
US3623819A (en) * 1969-07-22 1971-11-30 Gossen & Co Gmbh P Universally applicable photometer with adapters for reducing the measuring angle

Also Published As

Publication number Publication date
US2175027A (en) 1939-10-03

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