FR640608A - Photomètre - Google Patents

Photomètre

Info

Publication number
FR640608A
FR640608A FR640608DA FR640608A FR 640608 A FR640608 A FR 640608A FR 640608D A FR640608D A FR 640608DA FR 640608 A FR640608 A FR 640608A
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
English (en)
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.)
Twerdy Lampen Dr GmbH
Original Assignee
Twerdy Lampen Dr GmbH
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 Twerdy Lampen Dr GmbH filed Critical Twerdy Lampen Dr GmbH
Application granted granted Critical
Publication of FR640608A publication Critical patent/FR640608A/fr
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
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/28—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR640608D 1927-07-16 1927-07-16 Photomètre Expired FR640608A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR640608T 1927-07-16

Publications (1)

Publication Number Publication Date
FR640608A true FR640608A (fr) 1928-07-18

Family

ID=8997584

Family Applications (1)

Application Number Title Priority Date Filing Date
FR640608D Expired FR640608A (fr) 1927-07-16 1927-07-16 Photomètre

Country Status (1)

Country Link
FR (1) FR640608A (fr)

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