FR858737A - Light meter for aerial photography - Google Patents

Light meter for aerial photography

Info

Publication number
FR858737A
FR858737A FR858737DA FR858737A FR 858737 A FR858737 A FR 858737A FR 858737D A FR858737D A FR 858737DA FR 858737 A FR858737 A FR 858737A
Authority
FR
France
Prior art keywords
aerial photography
light meter
meter
light
photography
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
Charriou Andre Xavier Louis
Valette Suzanne Marie Jeanne
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 FR858737A publication Critical patent/FR858737A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR858737D 1939-05-02 1939-05-02 Light meter for aerial photography Expired FR858737A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR858737T 1939-05-02

Publications (1)

Publication Number Publication Date
FR858737A true FR858737A (en) 1940-12-02

Family

ID=9330101

Family Applications (1)

Application Number Title Priority Date Filing Date
FR858737D Expired FR858737A (en) 1939-05-02 1939-05-02 Light meter for aerial photography

Country Status (1)

Country Link
FR (1) FR858737A (en)

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