JPS487050Y1 - - Google Patents

Info

Publication number
JPS487050Y1
JPS487050Y1 JP1968094019U JP9401968U JPS487050Y1 JP S487050 Y1 JPS487050 Y1 JP S487050Y1 JP 1968094019 U JP1968094019 U JP 1968094019U JP 9401968 U JP9401968 U JP 9401968U JP S487050 Y1 JPS487050 Y1 JP S487050Y1
Authority
JP
Japan
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
JP1968094019U
Other languages
Japanese (ja)
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
Priority to JP1968094019U priority Critical patent/JPS487050Y1/ja
Priority to GB1258119D priority patent/GB1258119A/en
Priority to DE19691953715 priority patent/DE1953715A1/de
Priority to FR6936612A priority patent/FR2021698A1/fr
Publication of JPS487050Y1 publication Critical patent/JPS487050Y1/ja
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)
JP1968094019U 1968-10-28 1968-10-28 Expired JPS487050Y1 (enrdf_load_stackoverflow)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1968094019U JPS487050Y1 (enrdf_load_stackoverflow) 1968-10-28 1968-10-28
GB1258119D GB1258119A (enrdf_load_stackoverflow) 1968-10-28 1969-10-17
DE19691953715 DE1953715A1 (de) 1968-10-28 1969-10-24 Lichtdurchlaessiger Schirm mit einer Fresnel-Linse
FR6936612A FR2021698A1 (enrdf_load_stackoverflow) 1968-10-28 1969-10-24

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
JPS487050Y1 true JPS487050Y1 (enrdf_load_stackoverflow) 1973-02-23

Family

ID=14098805

Family Applications (1)

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

Country Status (4)

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

Families Citing this family (7)

* 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
US4701020A (en) * 1986-09-18 1987-10-20 North American Philips Consumer Electronics Corp. Rear projection screen with improved luminance uniformity
DE4121770A1 (de) * 1991-07-01 1993-01-07 Wilke Heinrich Hewi Gmbh Anordnung aus zwei teleskopisch miteinander verbundenen bauelementen
DE19737107C2 (de) * 1997-08-26 2001-02-08 Fresnel Optics Gmbh Optische Anordnung bestehend aus mindestens zwei Fresnellinsen und Projektions- bzw. Displayvorrichtung mit dieser Anordnung

Also Published As

Publication number Publication date
FR2021698A1 (enrdf_load_stackoverflow) 1970-07-24
GB1258119A (enrdf_load_stackoverflow) 1971-12-22
DE1953715A1 (de) 1970-05-27

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