FR816304A - Device for measuring the exposure time of photographic enlargements - Google Patents

Device for measuring the exposure time of photographic enlargements

Info

Publication number
FR816304A
FR816304A FR816304DA FR816304A FR 816304 A FR816304 A FR 816304A FR 816304D A FR816304D A FR 816304DA FR 816304 A FR816304 A FR 816304A
Authority
FR
France
Prior art keywords
measuring
exposure time
photographic enlargements
enlargements
photographic
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 FR816304A publication Critical patent/FR816304A/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
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/12—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using wholly visual means
    • G01J1/14—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using wholly visual means using comparison with a surface of graded brightness

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR816304D 1936-01-13 1937-01-13 Device for measuring the exposure time of photographic enlargements Expired FR816304A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE816304X 1936-01-13

Publications (1)

Publication Number Publication Date
FR816304A true FR816304A (en) 1937-08-05

Family

ID=6734959

Family Applications (1)

Application Number Title Priority Date Filing Date
FR816304D Expired FR816304A (en) 1936-01-13 1937-01-13 Device for measuring the exposure time of photographic enlargements

Country Status (1)

Country Link
FR (1) FR816304A (en)

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