GB434169A - Improvements in projection screens - Google Patents

Improvements in projection screens

Info

Publication number
GB434169A
GB434169A GB1802/35A GB180235A GB434169A GB 434169 A GB434169 A GB 434169A GB 1802/35 A GB1802/35 A GB 1802/35A GB 180235 A GB180235 A GB 180235A GB 434169 A GB434169 A GB 434169A
Authority
GB
United Kingdom
Prior art keywords
sheet
mirror
image
projection screens
transparent
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
GB1802/35A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB434169A publication Critical patent/GB434169A/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
    • 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
    • G03B21/606—Projection screens characterised by the nature of the surface for relief projection

Abstract

434,169. Projection screens. MENDOZA, R., 42, Avenida Francisco, Madero, Mexico City. Jan. 18, 1935, No. 1802. Convention date, Aug. 21, 1934. [Class 97 (i)] A projection screen comprises a sheet having transparent and opaque parts and a mirror at a short distance behind it producing an image of the image on the sheet which is visible through the transparent parts of the sheet. The sheet may be of woven material, and the separation of the sheet and mirror may be of the order of two centimetres. The sheet and mirror may be flat or curved, and may be nearer together at the edges than elsewhere. The screen may be arranged so that the reflected image of the source of light is in the field of view or out of it.
GB1802/35A 1934-08-21 1935-01-18 Improvements in projection screens Expired GB434169A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MX434169X 1934-08-21

Publications (1)

Publication Number Publication Date
GB434169A true GB434169A (en) 1935-08-27

Family

ID=19742813

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1802/35A Expired GB434169A (en) 1934-08-21 1935-01-18 Improvements in projection screens

Country Status (1)

Country Link
GB (1) GB434169A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492442A (en) * 1979-10-04 1985-01-08 Gaudyn Tad J Three dimensional projection arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492442A (en) * 1979-10-04 1985-01-08 Gaudyn Tad J Three dimensional projection arrangement

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