DE3669056D1 - Fresnellinse fuer projektionsschirme. - Google Patents

Fresnellinse fuer projektionsschirme.

Info

Publication number
DE3669056D1
DE3669056D1 DE8686202025T DE3669056T DE3669056D1 DE 3669056 D1 DE3669056 D1 DE 3669056D1 DE 8686202025 T DE8686202025 T DE 8686202025T DE 3669056 T DE3669056 T DE 3669056T DE 3669056 D1 DE3669056 D1 DE 3669056D1
Authority
DE
Germany
Prior art keywords
fresnel lens
projection screens
screens
projection
fresnel
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 - Lifetime
Application number
DE8686202025T
Other languages
English (en)
Inventor
Jill Forer Goldenberg
Thomas Stewart Mckechnie
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of DE3669056D1 publication Critical patent/DE3669056D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/72—Modifying the appearance of television pictures by optical filters or diffusing screens
    • 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
    • G03B21/62—Translucent screens
    • G03B21/625—Lenticular translucent screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Lenses (AREA)
DE8686202025T 1985-11-20 1986-11-17 Fresnellinse fuer projektionsschirme. Expired - Lifetime DE3669056D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/800,012 US4824227A (en) 1985-11-20 1985-11-20 Optimum riser angle for fresnel lenses in projection screens

Publications (1)

Publication Number Publication Date
DE3669056D1 true DE3669056D1 (de) 1990-03-22

Family

ID=25177299

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686202025T Expired - Lifetime DE3669056D1 (de) 1985-11-20 1986-11-17 Fresnellinse fuer projektionsschirme.

Country Status (8)

Country Link
US (1) US4824227A (de)
EP (1) EP0223310B1 (de)
JP (1) JPH07121131B2 (de)
KR (1) KR940011595B1 (de)
CA (1) CA1268065A (de)
DE (1) DE3669056D1 (de)
DK (1) DK174671B1 (de)
SG (1) SG85990G (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904069A (en) * 1987-12-14 1990-02-27 Ichikoh Industries, Ltd. Fresnel-type aspheric prism lens
JP2686536B2 (ja) * 1988-05-20 1997-12-08 パイオニア株式会社 ファイバー型光波長変換装置
KR950015238A (ko) * 1993-11-05 1995-06-16 배순훈 포커스 에러 검출장치
JPH10282310A (ja) * 1997-04-11 1998-10-23 Dainippon Printing Co Ltd フレネルレンズシート及び透過型スクリーン
US6867928B2 (en) * 2002-08-01 2005-03-15 Jenmar Visual Systems Method and apparatus for correcting visual aberrations in image projection systems
US6807020B2 (en) 2002-08-01 2004-10-19 Jenmar Visual Systems Lens optimization and color correction for image projection systems
US6700713B2 (en) * 2002-08-01 2004-03-02 Jenmar Visual Systems Lens optimization for image projection systems
FR2855273A1 (fr) * 2003-05-20 2004-11-26 Thomson Licensing Sa Lentille de fresnel a eclairer sous incidence elevee
US20050041307A1 (en) * 2003-07-22 2005-02-24 Stephen Barone Directed Fresnel lenses
JP4967247B2 (ja) * 2004-11-01 2012-07-04 株式会社日立製作所 画像表示装置及びそれに用いるスクリーン
US7740354B2 (en) 2006-10-25 2010-06-22 Volk Donald A Multi-layered gradient index progressive lens
US7735998B2 (en) 2006-10-25 2010-06-15 Volk Donald A Multi-layered multifocal lens with blended refractive index
FR2995408B1 (fr) * 2012-09-10 2016-11-18 Soitec Solar Gmbh Lentille de fresnel avec angle de depouille variable
EP4239378A1 (de) * 2016-09-13 2023-09-06 Facebook Technologies, LLC Fresnellinse mit dynamischem verzug für reduzierte optische artefakte
TWI651549B (zh) * 2018-02-12 2019-02-21 玉晶光電股份有限公司 菲涅耳透鏡
CN110161597B (zh) 2018-02-12 2021-11-16 玉晶光电(厦门)有限公司 菲涅耳透镜

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2200646A (en) * 1938-02-28 1940-05-14 John D Strong Transparent projection screen
DE2519617A1 (de) * 1975-05-02 1976-11-11 Agfa Gevaert Ag Projektionsschirm
US4457594A (en) * 1980-09-08 1984-07-03 B Optical Fresnel lens projection system with high gain screen
US4391495A (en) * 1981-06-02 1983-07-05 The Austin Company Image display system
US4398810A (en) * 1982-02-18 1983-08-16 B Optical Fresnel lens system
JPS59140434A (ja) * 1982-10-08 1984-08-11 Mitsubishi Rayon Co Ltd 背面投影スクリ−ン

Also Published As

Publication number Publication date
EP0223310A2 (de) 1987-05-27
DK547986D0 (da) 1986-11-17
US4824227A (en) 1989-04-25
KR870005550A (ko) 1987-06-09
SG85990G (en) 1991-01-04
DK174671B1 (da) 2003-08-25
EP0223310B1 (de) 1990-02-14
JPH07121131B2 (ja) 1995-12-20
CA1268065A (en) 1990-04-24
EP0223310A3 (en) 1987-10-28
KR940011595B1 (ko) 1994-12-22
JPS62175087A (ja) 1987-07-31
DK547986A (da) 1987-05-21

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS ELECTRONICS N.V., EINDHOVEN, NL

8327 Change in the person/name/address of the patent owner

Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V., EINDHOVEN, N

8339 Ceased/non-payment of the annual fee