FR647440A - Photomètre à cellule photoélectrique - Google Patents

Photomètre à cellule photoélectrique

Info

Publication number
FR647440A
FR647440A FR647440DA FR647440A FR 647440 A FR647440 A FR 647440A FR 647440D A FR647440D A FR 647440DA FR 647440 A FR647440 A FR 647440A
Authority
FR
France
Prior art keywords
photoelectric cell
cell photometer
photometer
photoelectric
cell
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.)
Compagnie des Lampes
Original Assignee
Compagnie des Lampes
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 Compagnie des Lampes filed Critical Compagnie des Lampes
Application granted granted Critical
Publication of FR647440A publication Critical patent/FR647440A/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)
FR647440D 1927-01-20 1928-01-18 Photomètre à cellule photoélectrique Expired FR647440A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US647440XA 1927-01-20 1927-01-20

Publications (1)

Publication Number Publication Date
FR647440A true FR647440A (fr) 1928-11-23

Family

ID=22058004

Family Applications (1)

Application Number Title Priority Date Filing Date
FR647440D Expired FR647440A (fr) 1927-01-20 1928-01-18 Photomètre à cellule photoélectrique

Country Status (1)

Country Link
FR (1) FR647440A (fr)

Similar Documents

Publication Publication Date Title
FR647440A (fr) Photomètre à cellule photoélectrique
FR723393A (fr) Cellule photoélectrique
FR632275A (fr) Charrue à deux socs
FR679682A (fr) ?leurs à rayonnement
FR705260A (fr) Cellule photo-électrique
FR700606A (fr) Cellule photoélectrique
FR724155A (fr) Cellule photoélectrique
FR653934A (fr) Cellule photoélectrique
FR682254A (fr) Cellule photoélectrique
FR726622A (fr) Cellule photoélectrique
FR657524A (fr) Cellule de sélénium
FR694652A (fr) Cellule photoélectrique
FR693043A (fr) Cellule photoélectrique
FR689577A (fr) Cellule photo-électrique
FR680103A (fr) Cellule photo-électrique
FR674964A (fr) Cellule photoélectrique
FR640608A (fr) Photomètre
FR48971E (fr) Photomètre à cellule photoélectrique
FR647854A (fr) Calendrier perfectionné
FR638737A (fr) Brise-vent
FR35722E (fr) Brise-vent
FR652470A (fr) Glissière de fenêtre
FR681961A (fr) Veilleur photoélectrique
FR689585A (fr) Cellule au sélénium
FR661398A (fr) Onguent