FR854417A - écran bleu - Google Patents

écran bleu

Info

Publication number
FR854417A
FR854417A FR854417DA FR854417A FR 854417 A FR854417 A FR 854417A FR 854417D A FR854417D A FR 854417DA FR 854417 A FR854417 A FR 854417A
Authority
FR
France
Prior art keywords
blue screen
blue
screen
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)
Inventor
Weil
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 filed Critical
Application granted granted Critical
Publication of FR854417A publication Critical patent/FR854417A/fr
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/04—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages the fastening being onto or by the light source

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR854417D 1939-05-08 1939-05-08 écran bleu Expired FR854417A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR854417T 1939-05-08

Publications (1)

Publication Number Publication Date
FR854417A true FR854417A (fr) 1940-04-15

Family

ID=9327755

Family Applications (1)

Application Number Title Priority Date Filing Date
FR854417D Expired FR854417A (fr) 1939-05-08 1939-05-08 écran bleu

Country Status (1)

Country Link
FR (1) FR854417A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3639345A1 (de) * 1986-03-17 1987-09-24 Horst Schaettgen Farbfiltereinrichtung fuer mit einer lampe versehene beleuchtungskoerper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3639345A1 (de) * 1986-03-17 1987-09-24 Horst Schaettgen Farbfiltereinrichtung fuer mit einer lampe versehene beleuchtungskoerper

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