FR393605A - Apparatus for measuring and recording the intensity of light, and tables for its application to photography - Google Patents

Apparatus for measuring and recording the intensity of light, and tables for its application to photography

Info

Publication number
FR393605A
FR393605A FR393605DA FR393605A FR 393605 A FR393605 A FR 393605A FR 393605D A FR393605D A FR 393605DA FR 393605 A FR393605 A FR 393605A
Authority
FR
France
Prior art keywords
photography
tables
recording
intensity
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
Emile Victor Prevost
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Application granted granted Critical
Publication of FR393605A publication Critical patent/FR393605A/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
    • G01J1/50—Photometry, e.g. photographic exposure meter using chemical effects using change in colour of an indicator, e.g. actinometer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR393605D 1907-08-23 1908-08-22 Apparatus for measuring and recording the intensity of light, and tables for its application to photography Expired FR393605A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US393605XA 1907-08-23 1907-08-23

Publications (1)

Publication Number Publication Date
FR393605A true FR393605A (en) 1908-12-29

Family

ID=1438894

Family Applications (1)

Application Number Title Priority Date Filing Date
FR393605D Expired FR393605A (en) 1907-08-23 1908-08-22 Apparatus for measuring and recording the intensity of light, and tables for its application to photography

Country Status (1)

Country Link
FR (1) FR393605A (en)

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