BE781336A - Ecran de projection ameliore - Google Patents

Ecran de projection ameliore

Info

Publication number
BE781336A
BE781336A BE781336A BE781336A BE781336A BE 781336 A BE781336 A BE 781336A BE 781336 A BE781336 A BE 781336A BE 781336 A BE781336 A BE 781336A BE 781336 A BE781336 A BE 781336A
Authority
BE
Belgium
Prior art keywords
projection screen
improved projection
improved
screen
projection
Prior art date
Application number
BE781336A
Other languages
English (en)
Original Assignee
Hubbard Noel K
Trelford Edward L
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 Hubbard Noel K, Trelford Edward L filed Critical Hubbard Noel K
Publication of BE781336A publication Critical patent/BE781336A/fr

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)
  • Overhead Projectors And Projection Screens (AREA)
BE781336A 1971-03-29 1972-03-28 Ecran de projection ameliore BE781336A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB808771 1971-03-29

Publications (1)

Publication Number Publication Date
BE781336A true BE781336A (fr) 1972-07-17

Family

ID=9845511

Family Applications (1)

Application Number Title Priority Date Filing Date
BE781336A BE781336A (fr) 1971-03-29 1972-03-28 Ecran de projection ameliore

Country Status (5)

Country Link
BE (1) BE781336A (fr)
DE (1) DE2214638A1 (fr)
FR (1) FR2131698A5 (fr)
IT (1) IT953572B (fr)
NL (1) NL7204111A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996021883A2 (fr) * 1995-01-14 1996-07-18 Optica Nova Onab Ab Ecran de projection
CN110554558A (zh) * 2018-05-31 2019-12-10 深圳光峰科技股份有限公司 一种高对比度反射屏幕

Also Published As

Publication number Publication date
DE2214638A1 (de) 1972-10-12
NL7204111A (fr) 1972-10-03
FR2131698A5 (en) 1972-11-10
IT953572B (it) 1973-08-10

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