FR988505A - Zero-brightness projectors - Google Patents

Zero-brightness projectors

Info

Publication number
FR988505A
FR988505A FR988505DA FR988505A FR 988505 A FR988505 A FR 988505A FR 988505D A FR988505D A FR 988505DA FR 988505 A FR988505 A FR 988505A
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 FR988505A publication Critical patent/FR988505A/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)
FR988505D 1944-01-04 1944-01-04 Zero-brightness projectors Expired FR988505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR988505T 1944-01-04

Publications (1)

Publication Number Publication Date
FR988505A true FR988505A (en) 1951-08-28

Family

ID=9539515

Family Applications (1)

Application Number Title Priority Date Filing Date
FR988505D Expired FR988505A (en) 1944-01-04 1944-01-04 Zero-brightness projectors

Country Status (1)

Country Link
FR (1) FR988505A (en)

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