FR887031A - Procédé et dispositif de mesure différentielle photo-électrique - Google Patents

Procédé et dispositif de mesure différentielle photo-électrique

Info

Publication number
FR887031A
FR887031A FR887031DA FR887031A FR 887031 A FR887031 A FR 887031A FR 887031D A FR887031D A FR 887031DA FR 887031 A FR887031 A FR 887031A
Authority
FR
France
Prior art keywords
measurement method
differential measurement
photoelectric
photoelectric differential
measurement
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Application granted granted Critical
Publication of FR887031A publication Critical patent/FR887031A/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
    • G01J1/34—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 separate light paths used alternately or sequentially, e.g. flicker
    • G01J1/36—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 separate light paths used alternately or sequentially, e.g. flicker using electric radiation detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR887031D 1940-01-30 1942-10-21 Procédé et dispositif de mesure différentielle photo-électrique Expired FR887031A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE887031X 1940-01-30

Publications (1)

Publication Number Publication Date
FR887031A true FR887031A (fr) 1943-11-02

Family

ID=1556451

Family Applications (1)

Application Number Title Priority Date Filing Date
FR887031D Expired FR887031A (fr) 1940-01-30 1942-10-21 Procédé et dispositif de mesure différentielle photo-électrique

Country Status (1)

Country Link
FR (1) FR887031A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4266876A (en) * 1977-03-31 1981-05-12 Nippon Kogaku K.K. Automatic alignment apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4266876A (en) * 1977-03-31 1981-05-12 Nippon Kogaku K.K. Automatic alignment apparatus

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