[go: up one dir, main page]

FR614172A - Appareil de mesure des éclairements - Google Patents

Appareil de mesure des éclairements

Info

Publication number
FR614172A
FR614172A FR614172DA FR614172A FR 614172 A FR614172 A FR 614172A FR 614172D A FR614172D A FR 614172DA FR 614172 A FR614172 A FR 614172A
Authority
FR
France
Prior art keywords
measuring device
illuminance measuring
illuminance
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
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR614172A publication Critical patent/FR614172A/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
    • G01J1/12—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using wholly visual means
    • G01J1/14—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using wholly visual means using comparison with a surface of graded brightness

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR614172D 1926-02-25 1926-04-07 Appareil de mesure des éclairements Expired FR614172A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL614172X 1926-02-25

Publications (1)

Publication Number Publication Date
FR614172A true FR614172A (fr) 1926-12-08

Family

ID=19788195

Family Applications (1)

Application Number Title Priority Date Filing Date
FR614172D Expired FR614172A (fr) 1926-02-25 1926-04-07 Appareil de mesure des éclairements

Country Status (1)

Country Link
FR (1) FR614172A (fr)

Similar Documents

Publication Publication Date Title
FR635653A (fr) Appareil de freinage
FR621277A (fr) Appareil pour la mesure du freinage
FR618121A (fr) Appareil de massage
FR614172A (fr) Appareil de mesure des éclairements
FR582599A (fr) Appareil de mesure
FR31695E (fr) Appareil rétroviseur-signalisateur
FR614559A (fr) Appareil de publicité
FR627738A (fr) Appareil de pesage
FR585014A (fr) Appareil de mesure
FR612639A (fr) Appareil de sauvetage perfectionné
FR631601A (fr) Appareil indicateur
FR641082A (fr) Appareil de massage
FR610111A (fr) Appareil casse-noix
FR627129A (fr) Appareil indicateur
FR609011A (fr) Appareil rétroviseur-signalisateur
FR609402A (fr) Appareil de sablage
FR643085A (fr) Appareil enregistreur
FR686117A (fr) Appareil indicateur
FR633297A (fr) Appareil de transvasement
FR602987A (fr) Appareil de mesure du freinage
FR621971A (fr) Appareil de publicité
FR623659A (fr) Appareil de publicité
FR613842A (fr) Appareil de publicité
FR612643A (fr) Appareil de publicité
FR611705A (fr) Appareil de publicité