FR988507A - Improvements to zero-brightness projectors - Google Patents

Improvements to zero-brightness projectors

Info

Publication number
FR988507A
FR988507A FR988507DA FR988507A FR 988507 A FR988507 A FR 988507A FR 988507D A FR988507D A FR 988507DA FR 988507 A FR988507 A FR 988507A
Authority
FR
France
Prior art keywords
zero
brightness projectors
projectors
brightness
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
French (fr)
Inventor
Pierre Cibie
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 FR988507A publication Critical patent/FR988507A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR988507D 1944-01-04 1944-01-04 Improvements to zero-brightness projectors Expired FR988507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR988507T 1944-01-04

Publications (1)

Publication Number Publication Date
FR988507A true FR988507A (en) 1951-08-28

Family

ID=9539517

Family Applications (1)

Application Number Title Priority Date Filing Date
FR988507D Expired FR988507A (en) 1944-01-04 1944-01-04 Improvements to zero-brightness projectors

Country Status (1)

Country Link
FR (1) FR988507A (en)

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