FR461891A - Photometer - Google Patents

Photometer

Info

Publication number
FR461891A
FR461891A FR461891DA FR461891A FR 461891 A FR461891 A FR 461891A FR 461891D A FR461891D A FR 461891DA FR 461891 A FR461891 A FR 461891A
Authority
FR
France
Prior art keywords
photometer
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
Andre-Eugene Blondel
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.)
ANDRE-EUGENE BLONDEL
Original Assignee
ANDRE-EUGENE BLONDEL
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 ANDRE-EUGENE BLONDEL filed Critical ANDRE-EUGENE BLONDEL
Application granted granted Critical
Publication of FR461891A publication Critical patent/FR461891A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR461891D 1912-11-08 1912-11-08 Photometer Expired FR461891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR461891T 1912-11-08

Publications (1)

Publication Number Publication Date
FR461891A true FR461891A (en) 1914-01-13

Family

ID=1501130

Family Applications (1)

Application Number Title Priority Date Filing Date
FR461891D Expired FR461891A (en) 1912-11-08 1912-11-08 Photometer

Country Status (1)

Country Link
FR (1) FR461891A (en)

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