GB550000A - Improvements in or relating to projection screens - Google Patents

Improvements in or relating to projection screens

Info

Publication number
GB550000A
GB550000A GB8342/41A GB834241A GB550000A GB 550000 A GB550000 A GB 550000A GB 8342/41 A GB8342/41 A GB 8342/41A GB 834241 A GB834241 A GB 834241A GB 550000 A GB550000 A GB 550000A
Authority
GB
United Kingdom
Prior art keywords
projection screens
july
layers
relating
background
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
GB8342/41A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB550000A publication Critical patent/GB550000A/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
    • G03B21/606—Projection screens characterised by the nature of the surface for relief projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

550,000. Projection screens. ROGERS, H. G: July 2, 1941, Nos. 8342 and 8343. Convention dates, July 2, 1940, and April 7, 1941. [Class 97 (i)] A projection screen comprises a thickness' 1 of transparent glass, plastic &c. having a background 2' of material which reflects very little light, and translucent material 3 at the front; its surfaces may be plane, or curved horizontally or both Horizontally and vertically, and its edges may be concealed by a mask 5. The background may be one or more layers of black material, paint &c. and the translucency may be produced by painting the front surface, by frosting or etching, or by one or more layers of translucent material such as silk; oiled paper, parchment, porcelain &c:
GB8342/41A 1940-07-02 1941-07-02 Improvements in or relating to projection screens Expired GB550000A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NZ550000X 1940-07-02

Publications (1)

Publication Number Publication Date
GB550000A true GB550000A (en) 1942-12-17

Family

ID=19915931

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8342/41A Expired GB550000A (en) 1940-07-02 1941-07-02 Improvements in or relating to projection screens

Country Status (1)

Country Link
GB (1) GB550000A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1108467B (en) * 1959-05-20 1961-06-08 Horst Kallenberger Projection screen for light images to achieve a three-dimensional, spatial image effect
DE1203979B (en) * 1957-01-15 1965-10-28 Albert Capetta Relief screen for displaying images
DE1772833B1 (en) * 1967-07-13 1972-05-25 Eastman Kodak Co screen
US4364635A (en) * 1980-06-13 1982-12-21 Horst Stief Slide-screen for back projection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1203979B (en) * 1957-01-15 1965-10-28 Albert Capetta Relief screen for displaying images
DE1108467B (en) * 1959-05-20 1961-06-08 Horst Kallenberger Projection screen for light images to achieve a three-dimensional, spatial image effect
DE1772833B1 (en) * 1967-07-13 1972-05-25 Eastman Kodak Co screen
US4364635A (en) * 1980-06-13 1982-12-21 Horst Stief Slide-screen for back projection

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