NL7611229A - Variable curved surface projection screen - has flexible membrane curved by gas pressure to maintain symmetry at different radii of curvature - Google Patents

Variable curved surface projection screen - has flexible membrane curved by gas pressure to maintain symmetry at different radii of curvature

Info

Publication number
NL7611229A
NL7611229A NL7611229A NL7611229A NL7611229A NL 7611229 A NL7611229 A NL 7611229A NL 7611229 A NL7611229 A NL 7611229A NL 7611229 A NL7611229 A NL 7611229A NL 7611229 A NL7611229 A NL 7611229A
Authority
NL
Netherlands
Prior art keywords
curvature
curved
projection screen
gas pressure
flexible membrane
Prior art date
Application number
NL7611229A
Other languages
Dutch (nl)
Original Assignee
Intercontinental Satellite Net
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 Intercontinental Satellite Net filed Critical Intercontinental Satellite Net
Priority to NL7611229A priority Critical patent/NL7611229A/en
Publication of NL7611229A publication Critical patent/NL7611229A/en

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Tents Or Canopies (AREA)

Abstract

A projection screen includes a frame supporting the screen which is curved in both horizontal and vertical directions. The front side is covered by a membrane with an edging and the gear side with a cover attached to the edging of the front membrane to form a chamber within which the screen is contained. The chamber can be partially evacuated by a fan as a result of which the membrane assumes a concave shape with a relatively constant radius of curvature about a single point; the projection surface becoming spherical in section. The radius of curvature can be varied by a slide which controls the exhausting of the chamber.
NL7611229A 1976-10-11 1976-10-11 Variable curved surface projection screen - has flexible membrane curved by gas pressure to maintain symmetry at different radii of curvature NL7611229A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7611229A NL7611229A (en) 1976-10-11 1976-10-11 Variable curved surface projection screen - has flexible membrane curved by gas pressure to maintain symmetry at different radii of curvature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7611229A NL7611229A (en) 1976-10-11 1976-10-11 Variable curved surface projection screen - has flexible membrane curved by gas pressure to maintain symmetry at different radii of curvature

Publications (1)

Publication Number Publication Date
NL7611229A true NL7611229A (en) 1978-04-13

Family

ID=19827031

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7611229A NL7611229A (en) 1976-10-11 1976-10-11 Variable curved surface projection screen - has flexible membrane curved by gas pressure to maintain symmetry at different radii of curvature

Country Status (1)

Country Link
NL (1) NL7611229A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113507969A (en) * 2019-03-07 2021-10-15 环球城市电影有限责任公司 Surface technology capable of actuation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113507969A (en) * 2019-03-07 2021-10-15 环球城市电影有限责任公司 Surface technology capable of actuation

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Legal Events

Date Code Title Description
BV The patent application has lapsed