FR2413685A1 - Non-dazzling reflecting projection screen - has Fresnel lens structure formed on diffusion layer - Google Patents

Non-dazzling reflecting projection screen - has Fresnel lens structure formed on diffusion layer

Info

Publication number
FR2413685A1
FR2413685A1 FR7836554A FR7836554A FR2413685A1 FR 2413685 A1 FR2413685 A1 FR 2413685A1 FR 7836554 A FR7836554 A FR 7836554A FR 7836554 A FR7836554 A FR 7836554A FR 2413685 A1 FR2413685 A1 FR 2413685A1
Authority
FR
France
Prior art keywords
diffusion layer
fresnel lens
lens structure
structure formed
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.)
Granted
Application number
FR7836554A
Other languages
French (fr)
Other versions
FR2413685B1 (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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Publication of FR2413685A1 publication Critical patent/FR2413685A1/en
Application granted granted Critical
Publication of FR2413685B1 publication Critical patent/FR2413685B1/fr
Granted 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
    • G03B21/602—Lenticular screens

Abstract

The screen is of the reflecting type designed for observation of an image projected on it. The screen has a diffusion layer formed from a material having a refraction power distribution. This distribution is not the same in two orthogonal directions. The layer can reflect incident light with a reflected light distribution which is not the same in the two orthogonal directions. A Fresnel lens structure includes a certain number of concentric annular band surfaces (11). These surfaces are inclined towards a common (O) centre and have a roughened surface.
FR7836554A 1977-12-28 1978-12-27 Non-dazzling reflecting projection screen - has Fresnel lens structure formed on diffusion layer Granted FR2413685A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16013577A JPS5492234A (en) 1977-12-28 1977-12-28 Reflection type screen

Publications (2)

Publication Number Publication Date
FR2413685A1 true FR2413685A1 (en) 1979-07-27
FR2413685B1 FR2413685B1 (en) 1982-11-19

Family

ID=15708620

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7836554A Granted FR2413685A1 (en) 1977-12-28 1978-12-27 Non-dazzling reflecting projection screen - has Fresnel lens structure formed on diffusion layer

Country Status (2)

Country Link
JP (1) JPS5492234A (en)
FR (1) FR2413685A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022049A1 (en) * 1993-03-23 1994-09-29 Optica Nova Onab Ab Projection screen
EP0825480A2 (en) * 1996-08-16 1998-02-25 Dai Nippon Printing Co., Ltd. Reflection screen and front projection system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR964859A (en) * 1950-08-26
FR2383460A1 (en) * 1977-03-10 1978-10-06 Canon Kk VIEWER

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4854934A (en) * 1971-11-08 1973-08-02
DE2317944B1 (en) * 1972-04-10 1973-11-15 Foamed thermoplastics prepn - by incorporating water and blowing agent under pressure
JPS5815761B2 (en) * 1974-10-07 1983-03-28 キヤノン株式会社 Hikarikakusanbuzai Oyobisono Seizouhouhou

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR964859A (en) * 1950-08-26
FR2383460A1 (en) * 1977-03-10 1978-10-06 Canon Kk VIEWER

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994022049A1 (en) * 1993-03-23 1994-09-29 Optica Nova Onab Ab Projection screen
EP0825480A2 (en) * 1996-08-16 1998-02-25 Dai Nippon Printing Co., Ltd. Reflection screen and front projection system
EP0825480A3 (en) * 1996-08-16 2000-10-25 Dai Nippon Printing Co., Ltd. Reflection screen and front projection system

Also Published As

Publication number Publication date
JPS5492234A (en) 1979-07-21
FR2413685B1 (en) 1982-11-19

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