GB1258119A - - Google Patents

Info

Publication number
GB1258119A
GB1258119A GB1258119DA GB1258119A GB 1258119 A GB1258119 A GB 1258119A GB 1258119D A GB1258119D A GB 1258119DA GB 1258119 A GB1258119 A GB 1258119A
Authority
GB
United Kingdom
Prior art keywords
oct
lens
lenses
fresnel lenses
film
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
Other languages
English (en)
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 filed Critical
Publication of GB1258119A publication Critical patent/GB1258119A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • 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)
  • Optics & Photonics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
GB1258119D 1968-10-28 1969-10-17 Expired GB1258119A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1968094019U JPS487050Y1 (fr) 1968-10-28 1968-10-28

Publications (1)

Publication Number Publication Date
GB1258119A true GB1258119A (fr) 1971-12-22

Family

ID=14098805

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1258119D Expired GB1258119A (fr) 1968-10-28 1969-10-17

Country Status (4)

Country Link
JP (1) JPS487050Y1 (fr)
DE (1) DE1953715A1 (fr)
FR (1) FR2021698A1 (fr)
GB (1) GB1258119A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0260758A2 (fr) * 1986-09-18 1988-03-23 Philips Electronics North America Corporation Ecran à uniformité avancée de luminance pour projection par transparence
WO1999010760A1 (fr) * 1997-08-26 1999-03-04 Fresnel Optics Gmbh Systeme optique constitue d'au moins deux lentilles de fresnel et son utilisation

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2629186C2 (de) * 1976-06-29 1985-10-03 Heinrich Wilke Gmbh, 3548 Arolsen Zwischen zwei Wänden einspannbare Tragstange
IT1115189B (it) * 1978-05-30 1986-02-03 Rca Corp Lente fresnel
FR2472197A1 (fr) * 1979-12-18 1981-06-26 Cintra Daniel Lentille de fresnel et son application a la television
FR2557983B1 (fr) * 1984-01-09 1987-11-27 Loison Daniel Procede et systeme de formation et de projection d'images donnant une impression de relief
DE4121770A1 (de) * 1991-07-01 1993-01-07 Wilke Heinrich Hewi Gmbh Anordnung aus zwei teleskopisch miteinander verbundenen bauelementen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0260758A2 (fr) * 1986-09-18 1988-03-23 Philips Electronics North America Corporation Ecran à uniformité avancée de luminance pour projection par transparence
EP0260758A3 (en) * 1986-09-18 1988-08-24 North American Philips Consumer Electronics Corp. Rear projection screen with improved luminance uniformity
WO1999010760A1 (fr) * 1997-08-26 1999-03-04 Fresnel Optics Gmbh Systeme optique constitue d'au moins deux lentilles de fresnel et son utilisation
US6377406B1 (en) 1997-08-26 2002-04-23 Fresnel Optics, Inc. Optical arrangement and the use thereof

Also Published As

Publication number Publication date
JPS487050Y1 (fr) 1973-02-23
DE1953715A1 (de) 1970-05-27
FR2021698A1 (fr) 1970-07-24

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee