FR640033A - Improvements to screens for light projections - Google Patents

Improvements to screens for light projections

Info

Publication number
FR640033A
FR640033A FR640033DA FR640033A FR 640033 A FR640033 A FR 640033A FR 640033D A FR640033D A FR 640033DA FR 640033 A FR640033 A FR 640033A
Authority
FR
France
Prior art keywords
screens
light projections
projections
light
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)
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.)
BULMAN JUPITER SCREEN CO
Original Assignee
BULMAN JUPITER SCREEN CO
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 BULMAN JUPITER SCREEN CO filed Critical BULMAN JUPITER SCREEN CO
Application granted granted Critical
Publication of FR640033A publication Critical patent/FR640033A/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)
FR640033D 1926-08-27 1927-08-26 Improvements to screens for light projections Expired FR640033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE640033X 1926-08-27

Publications (1)

Publication Number Publication Date
FR640033A true FR640033A (en) 1928-07-04

Family

ID=3876345

Family Applications (1)

Application Number Title Priority Date Filing Date
FR640033D Expired FR640033A (en) 1926-08-27 1927-08-26 Improvements to screens for light projections

Country Status (1)

Country Link
FR (1) FR640033A (en)

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