GB1311921A - Directional light transmitting screens - Google Patents

Directional light transmitting screens

Info

Publication number
GB1311921A
GB1311921A GB2305470A GB2305470A GB1311921A GB 1311921 A GB1311921 A GB 1311921A GB 2305470 A GB2305470 A GB 2305470A GB 2305470 A GB2305470 A GB 2305470A GB 1311921 A GB1311921 A GB 1311921A
Authority
GB
United Kingdom
Prior art keywords
screen
lens systems
axes
light transmitting
directional light
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
GB2305470A
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of GB1311921A publication Critical patent/GB1311921A/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)
  • Projection Apparatus (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

1311921 Solar heating RICOH KK 13 May 1970 [18 June 1969] 23054/70 Heading F4U [Also in Division G2] A directional light transmitting projection screen consists of an array of convex lens systems 1, 2, 3 the outer faces of lenses such as 1 and 2 together constituting the two spaced parallel surfaces of the screen, the arrangement of lens systems being such that a light source on one side of the screen is imaged on the other side with a half-tone screen effect. The axes of the lens systems may be parallel and perpendicular to or inclined to the general surfaces of the screen, or the axes may be mutually inclined. Again, the refractive powers of the lens systems may be identical or may differ and be arranged in interlaced patterns in the screen. The lenses 1, 2, 3 may be symmetrically or asymmetrically spaced on their axes. With appropriate choice of axis inclination and refractive power of the lens systems, the screen may be used to provide a focusing system in a solar oven (other applications in Heading G2A).
GB2305470A 1969-06-18 1970-05-13 Directional light transmitting screens Expired GB1311921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44048475A JPS51456B1 (en) 1969-06-18 1969-06-18

Publications (1)

Publication Number Publication Date
GB1311921A true GB1311921A (en) 1973-03-28

Family

ID=12804394

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2305470A Expired GB1311921A (en) 1969-06-18 1970-05-13 Directional light transmitting screens

Country Status (4)

Country Link
JP (1) JPS51456B1 (en)
DE (1) DE2029800B2 (en)
FR (1) FR2046869B1 (en)
GB (1) GB1311921A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2234363A (en) * 1988-12-20 1991-01-30 Michael Ridgway Stereoscopic system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007187745A (en) * 2006-01-11 2007-07-26 Sony Corp Image display device
JP4728825B2 (en) * 2006-02-06 2011-07-20 日本放送協会 3D image display device
US8189037B2 (en) * 2010-03-17 2012-05-29 Seiko Epson Corporation Various configurations of the viewing window based 3D display system
DE202016006196U1 (en) 2016-10-06 2017-02-21 SCI Data GbR (vertretungsberechtigter Gesellschafter: Daniel Linder, 91611 Lehrberg; Patrick Linder, 91611 Lehrberg) Light source with optical straightening foil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2234363A (en) * 1988-12-20 1991-01-30 Michael Ridgway Stereoscopic system

Also Published As

Publication number Publication date
DE2029800A1 (en) 1971-01-14
DE2029800B2 (en) 1976-08-12
FR2046869B1 (en) 1973-01-12
FR2046869A1 (en) 1971-03-12
JPS51456B1 (en) 1976-01-08

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Legal Events

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