FR42855E - Pocket photometer for photography - Google Patents

Pocket photometer for photography

Info

Publication number
FR42855E
FR42855E FR42855DA FR42855E FR 42855 E FR42855 E FR 42855E FR 42855D A FR42855D A FR 42855DA FR 42855 E FR42855 E FR 42855E
Authority
FR
France
Prior art keywords
photometer
photography
pocket
pocket 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
French (fr)
Inventor
Antoine Luzy
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 filed Critical
Application granted granted Critical
Publication of FR42855E publication Critical patent/FR42855E/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
    • G01J1/38—Photometry, e.g. photographic exposure meter using wholly visual means
    • G01J1/40—Photometry, e.g. photographic exposure meter using wholly visual means using limit or visibility or extinction effect

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR42855D 1932-07-08 1932-07-08 Pocket photometer for photography Expired FR42855E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR42855T 1932-07-08

Publications (1)

Publication Number Publication Date
FR42855E true FR42855E (en) 1933-11-15

Family

ID=8678878

Family Applications (1)

Application Number Title Priority Date Filing Date
FR42855D Expired FR42855E (en) 1932-07-08 1932-07-08 Pocket photometer for photography

Country Status (1)

Country Link
FR (1) FR42855E (en)

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