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FR782845A - Improvements to projection systems - Google Patents

Improvements to projection systems

Info

Publication number
FR782845A
FR782845A FR782845DA FR782845A FR 782845 A FR782845 A FR 782845A FR 782845D A FR782845D A FR 782845DA FR 782845 A FR782845 A FR 782845A
Authority
FR
France
Prior art keywords
projection systems
projection
systems
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
Claude Chabal
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 FR782845A publication Critical patent/FR782845A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR782845D 1934-03-03 1934-03-03 Improvements to projection systems Expired FR782845A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR782845T 1934-03-03

Publications (1)

Publication Number Publication Date
FR782845A true FR782845A (en) 1935-06-12

Family

ID=9213360

Family Applications (1)

Application Number Title Priority Date Filing Date
FR782845D Expired FR782845A (en) 1934-03-03 1934-03-03 Improvements to projection systems

Country Status (1)

Country Link
FR (1) FR782845A (en)

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