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GB532814A - Improvements relating to the optical projection of images - Google Patents

Improvements relating to the optical projection of images

Info

Publication number
GB532814A
GB532814A GB2181239A GB2181239A GB532814A GB 532814 A GB532814 A GB 532814A GB 2181239 A GB2181239 A GB 2181239A GB 2181239 A GB2181239 A GB 2181239A GB 532814 A GB532814 A GB 532814A
Authority
GB
United Kingdom
Prior art keywords
images
optical projection
improvements relating
reflector
aperture
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
GB2181239A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB2181239A priority Critical patent/GB532814A/en
Publication of GB532814A publication Critical patent/GB532814A/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
    • G03B21/13—Projectors for producing special effects at the edges of picture, e.g. blurring

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

532,814. Optical-projection apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., and BOWEN, A. July 27, 1939, No. 21812. [Class 97 (i)] Apertured concave and convex reflectors 9, 8 spaced in succession between the projection lens 5 and screen 6 reflect fringing rays of the projection beam to form an illuminated image surround on the screen. The aperture in the reflector 8 may be rectangular, the ratio of its dimensions being similar to that of the image dimensions ; the aperture in the reflector 9 may be circular.
GB2181239A 1939-07-27 1939-07-27 Improvements relating to the optical projection of images Expired GB532814A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2181239A GB532814A (en) 1939-07-27 1939-07-27 Improvements relating to the optical projection of images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2181239A GB532814A (en) 1939-07-27 1939-07-27 Improvements relating to the optical projection of images

Publications (1)

Publication Number Publication Date
GB532814A true GB532814A (en) 1941-01-31

Family

ID=10169227

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2181239A Expired GB532814A (en) 1939-07-27 1939-07-27 Improvements relating to the optical projection of images

Country Status (1)

Country Link
GB (1) GB532814A (en)

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