GB1290892A - - Google Patents

Info

Publication number
GB1290892A
GB1290892A GB1290892DA GB1290892A GB 1290892 A GB1290892 A GB 1290892A GB 1290892D A GB1290892D A GB 1290892DA GB 1290892 A GB1290892 A GB 1290892A
Authority
GB
United Kingdom
Prior art keywords
mirror
projector
chair
dec
images
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
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 GB1290892A publication Critical patent/GB1290892A/en
Expired 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
    • G03B35/00—Stereoscopic photography
    • G03B35/18—Stereoscopic photography by simultaneous viewing
    • G03B35/20—Stereoscopic photography by simultaneous viewing using two or more projectors
    • 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
    • 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
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action

Abstract

1290892 Optical projection apparatus RICOH K K 15 Dec 1969 [30 Dec 1968] 60968/69 Heading G2A A projector 5 is mounted on a chair 2 and throws images on to a reflex screen 1 via a mirror 3 for viewing by an observer seated in the chair. Multiple screens receiving images from more than one projector are disclosed. An illumination system in one embodiment comprises a toroidal mirror as lens used with a normal lamp and a semi-annular mirror 3.
GB1290892D 1968-12-30 1969-12-15 Expired GB1290892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11470668U JPS4724425Y1 (en) 1968-12-30 1968-12-30

Publications (1)

Publication Number Publication Date
GB1290892A true GB1290892A (en) 1972-09-27

Family

ID=14644568

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2175872A Expired GB1291810A (en) 1968-12-30 1969-12-15 Improvements in and relating to optical projection apparatus
GB1290892D Expired GB1290892A (en) 1968-12-30 1969-12-15

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB2175872A Expired GB1291810A (en) 1968-12-30 1969-12-15 Improvements in and relating to optical projection apparatus

Country Status (3)

Country Link
JP (1) JPS4724425Y1 (en)
FR (1) FR2027379A1 (en)
GB (2) GB1291810A (en)

Also Published As

Publication number Publication date
FR2027379A1 (en) 1970-09-25
GB1291810A (en) 1972-10-04
DE1964787B2 (en) 1972-10-12
JPS4724425Y1 (en) 1972-08-02
DE1964787A1 (en) 1970-07-16

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Legal Events

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