FR48971E - Photomètre à cellule photoélectrique - Google Patents

Photomètre à cellule photoélectrique

Info

Publication number
FR48971E
FR48971E FR48971DA FR48971E FR 48971 E FR48971 E FR 48971E FR 48971D A FR48971D A FR 48971DA FR 48971 E FR48971 E FR 48971E
Authority
FR
France
Prior art keywords
photoelectric cell
cell photometer
photometer
photoelectric
cell
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.)
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 FR48971E publication Critical patent/FR48971E/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)
FR48971D 1937-11-09 1937-11-09 Photomètre à cellule photoélectrique Expired FR48971E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR48971T 1937-11-09

Publications (1)

Publication Number Publication Date
FR48971E true FR48971E (fr) 1938-10-05

Family

ID=8684211

Family Applications (1)

Application Number Title Priority Date Filing Date
FR48971D Expired FR48971E (fr) 1937-11-09 1937-11-09 Photomètre à cellule photoélectrique

Country Status (1)

Country Link
FR (1) FR48971E (fr)

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