GB447896A - Improvements relating to kinematographic projection - Google Patents

Improvements relating to kinematographic projection

Info

Publication number
GB447896A
GB447896A GB2997833A GB2997833A GB447896A GB 447896 A GB447896 A GB 447896A GB 2997833 A GB2997833 A GB 2997833A GB 2997833 A GB2997833 A GB 2997833A GB 447896 A GB447896 A GB 447896A
Authority
GB
United Kingdom
Prior art keywords
projection
screen
improvements relating
lens
kinematographic
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
GB2997833A
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
Priority to GB2997833A priority Critical patent/GB447896A/en
Publication of GB447896A publication Critical patent/GB447896A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lenses (AREA)

Abstract

447,896. Projection screens. SPENCER, J., 50, Tower Hill, Ormskirk, Lancashire. Nov. 27, 1934, No. 29978/33. [Class 97 (i)] A projection screen comprises a double convex lens 1 and a convexo-concave semi-transparent screen 3 spaced therefrom, the curvatures of the screen and facing lens surface being substantially the same. The lens may consist of a hollow transparent vessel filled with water ; its maximum thickness may not exceed one half of its diameter.
GB2997833A 1934-11-27 1934-11-27 Improvements relating to kinematographic projection Expired GB447896A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2997833A GB447896A (en) 1934-11-27 1934-11-27 Improvements relating to kinematographic projection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2997833A GB447896A (en) 1934-11-27 1934-11-27 Improvements relating to kinematographic projection

Publications (1)

Publication Number Publication Date
GB447896A true GB447896A (en) 1936-05-27

Family

ID=10300273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2997833A Expired GB447896A (en) 1934-11-27 1934-11-27 Improvements relating to kinematographic projection

Country Status (1)

Country Link
GB (1) GB447896A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2884833A (en) * 1953-09-16 1959-05-05 Pohl Frederic Optical system for viewing pictures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2884833A (en) * 1953-09-16 1959-05-05 Pohl Frederic Optical system for viewing pictures

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