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GB782033A - Improvements in and relating to picture projection screens - Google Patents

Improvements in and relating to picture projection screens

Info

Publication number
GB782033A
GB782033A GB17745/55A GB1774555A GB782033A GB 782033 A GB782033 A GB 782033A GB 17745/55 A GB17745/55 A GB 17745/55A GB 1774555 A GB1774555 A GB 1774555A GB 782033 A GB782033 A GB 782033A
Authority
GB
United Kingdom
Prior art keywords
irregularities
projection screens
inflection
intersecting
june
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
GB17745/55A
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.)
EXPLOITATIE MIJ HET HOF VAN HO
Original Assignee
EXPLOITATIE MIJ HET HOF VAN HO
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 EXPLOITATIE MIJ HET HOF VAN HO filed Critical EXPLOITATIE MIJ HET HOF VAN HO
Publication of GB782033A publication Critical patent/GB782033A/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
    • G03B21/62—Translucent screens
    • G03B21/625—Lenticular translucent screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

782,033. Projection screens. JACOBSON. J. S. and NAAMLOOZE VENNOOTSCHAP EXPLOITATIE MAATSCHAPPIJ HET HOF VAN HOLLAND. June 20, 1955 [June 28, 1954], No. 17745/55. Class 97(1) The irregularities on the surface of a light transmitting screen are bounded by portions AP, PB of sine curves, each containing a point of inflection, intersecting at the crests and troughs of the irregularities, the tangents HC, HD at the points of inflection making angles of at least 5 degrees with the screen plane. The irregularities of the cross section shown may be parallel ridges which may be straight or curved or intersecting or short ridges of random shape and length or figures of revolution.
GB17745/55A 1954-06-28 1955-06-20 Improvements in and relating to picture projection screens Expired GB782033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL782033X 1954-06-28

Publications (1)

Publication Number Publication Date
GB782033A true GB782033A (en) 1957-08-28

Family

ID=19832172

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17745/55A Expired GB782033A (en) 1954-06-28 1955-06-20 Improvements in and relating to picture projection screens

Country Status (1)

Country Link
GB (1) GB782033A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314943A (en) * 1996-07-01 1998-01-14 Nashua Corp Projection or depixelating screen
EP1411732A2 (en) * 2002-10-16 2004-04-21 Eastman Kodak Company Display systems using organic laser light sources

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314943A (en) * 1996-07-01 1998-01-14 Nashua Corp Projection or depixelating screen
GB2314943B (en) * 1996-07-01 2000-08-30 Nashua Corp Improvements in or relating to light diffusers
EP1411732A2 (en) * 2002-10-16 2004-04-21 Eastman Kodak Company Display systems using organic laser light sources
EP1411732A3 (en) * 2002-10-16 2007-05-30 Eastman Kodak Company Display systems using organic laser light sources

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