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JPS56165135A - Transmission type screen - Google Patents

Transmission type screen

Info

Publication number
JPS56165135A
JPS56165135A JP6934580A JP6934580A JPS56165135A JP S56165135 A JPS56165135 A JP S56165135A JP 6934580 A JP6934580 A JP 6934580A JP 6934580 A JP6934580 A JP 6934580A JP S56165135 A JPS56165135 A JP S56165135A
Authority
JP
Japan
Prior art keywords
ellipse
long axis
screen
inclination
center
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.)
Pending
Application number
JP6934580A
Other languages
Japanese (ja)
Inventor
Akira Izawa
Fumio Takagi
Taiji Ishii
Masaki Tsukada
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.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing 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 Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP6934580A priority Critical patent/JPS56165135A/en
Publication of JPS56165135A publication Critical patent/JPS56165135A/en
Pending 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

PURPOSE:To make brightness at the center and on the periphery of a picture uniform by using a lenticular screen having a form with which an inclination of the long axis of an ellipse becomes large in proportion to a distance from the center. CONSTITUTION:A transmission type modulated lenticular screen 1 comprising lenticular lenses a0, a1,...an is formed in a form where at the center of the screen a long axis x is horizontal to the screen surface and on the approach to the edge part of the left and the right a form of the arc of said ellipse being changed while an inclination of the long axis becoming large. The arc of each ellipse may be constructed with one part of the same ellipse and the form of the ellipse has been composed such that a proportion of the short axis x to the long axis y is 1:3-3:4, the inclination of the ellipse being under 60 deg. at the both side, the pitch of each ellipsoidal lens being approximately constant and being ranged with 3/4-1/2 of the length of the short axis y.
JP6934580A 1980-05-23 1980-05-23 Transmission type screen Pending JPS56165135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6934580A JPS56165135A (en) 1980-05-23 1980-05-23 Transmission type screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6934580A JPS56165135A (en) 1980-05-23 1980-05-23 Transmission type screen

Publications (1)

Publication Number Publication Date
JPS56165135A true JPS56165135A (en) 1981-12-18

Family

ID=13399858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6934580A Pending JPS56165135A (en) 1980-05-23 1980-05-23 Transmission type screen

Country Status (1)

Country Link
JP (1) JPS56165135A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58216235A (en) * 1982-06-10 1983-12-15 Dainippon Printing Co Ltd Transmission type projection screen
JPS60232538A (en) * 1984-04-20 1985-11-19 Arisawa Seisakusho:Kk Transmission type screen
JPS61241741A (en) * 1985-04-19 1986-10-28 Hitachi Ltd Transparent screen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5136932B2 (en) * 1973-07-02 1976-10-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5136932B2 (en) * 1973-07-02 1976-10-13

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58216235A (en) * 1982-06-10 1983-12-15 Dainippon Printing Co Ltd Transmission type projection screen
JPS60232538A (en) * 1984-04-20 1985-11-19 Arisawa Seisakusho:Kk Transmission type screen
JPS61241741A (en) * 1985-04-19 1986-10-28 Hitachi Ltd Transparent screen

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