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FR47782E - Method and device for using and measuring variations in illumination - Google Patents

Method and device for using and measuring variations in illumination

Info

Publication number
FR47782E
FR47782E FR47782DA FR47782E FR 47782 E FR47782 E FR 47782E FR 47782D A FR47782D A FR 47782DA FR 47782 E FR47782 E FR 47782E
Authority
FR
France
Prior art keywords
illumination
measuring variations
variations
measuring
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
Constantin Chilowsky
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 FR47782E publication Critical patent/FR47782E/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
    • G01J1/48—Photometry, e.g. photographic exposure meter using chemical effects
    • G01J1/54—Photometry, e.g. photographic exposure meter using chemical effects by observing photo-reactions between gases

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR47782D 1936-03-14 1936-03-14 Method and device for using and measuring variations in illumination Expired FR47782E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR47782T 1936-03-14

Publications (1)

Publication Number Publication Date
FR47782E true FR47782E (en) 1937-07-17

Family

ID=8683214

Family Applications (1)

Application Number Title Priority Date Filing Date
FR47782D Expired FR47782E (en) 1936-03-14 1936-03-14 Method and device for using and measuring variations in illumination

Country Status (1)

Country Link
FR (1) FR47782E (en)

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