FR650001A - Instrument for measuring the light intensity, and especially the exposure time for photographic shots - Google Patents

Instrument for measuring the light intensity, and especially the exposure time for photographic shots

Info

Publication number
FR650001A
FR650001A FR650001DA FR650001A FR 650001 A FR650001 A FR 650001A FR 650001D A FR650001D A FR 650001DA FR 650001 A FR650001 A FR 650001A
Authority
FR
France
Prior art keywords
instrument
measuring
light intensity
exposure time
photographic shots
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
Wilhelm Schlichter
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 FR650001A publication Critical patent/FR650001A/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)
FR650001D 1926-08-23 1927-08-23 Instrument for measuring the light intensity, and especially the exposure time for photographic shots Expired FR650001A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE650001X 1926-08-23

Publications (1)

Publication Number Publication Date
FR650001A true FR650001A (en) 1928-12-31

Family

ID=6581344

Family Applications (1)

Application Number Title Priority Date Filing Date
FR650001D Expired FR650001A (en) 1926-08-23 1927-08-23 Instrument for measuring the light intensity, and especially the exposure time for photographic shots

Country Status (1)

Country Link
FR (1) FR650001A (en)

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