FR850274A - écran de projection - Google Patents

écran de projection

Info

Publication number
FR850274A
FR850274A FR850274DA FR850274A FR 850274 A FR850274 A FR 850274A FR 850274D A FR850274D A FR 850274DA FR 850274 A FR850274 A FR 850274A
Authority
FR
France
Prior art keywords
projection screen
projection
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)
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.)
Opticolor AG
Original Assignee
Opticolor AG
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 Opticolor AG filed Critical Opticolor AG
Application granted granted Critical
Publication of FR850274A publication Critical patent/FR850274A/fr
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)
FR850274D 1938-02-18 1939-02-14 écran de projection Expired FR850274A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE850274X 1938-02-18

Publications (1)

Publication Number Publication Date
FR850274A true FR850274A (fr) 1939-12-12

Family

ID=6776950

Family Applications (1)

Application Number Title Priority Date Filing Date
FR850274D Expired FR850274A (fr) 1938-02-18 1939-02-14 écran de projection

Country Status (1)

Country Link
FR (1) FR850274A (fr)

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