Polarizing screen

Details Polarizing screen Polarizing screen

1994-09-23

1995-08-22

Ben, Loha

Optical: systems and elements

Polarization without modulation

359486, G02B 530

Patent

active

054445701

ABSTRACT:
A polarizing screen 20 for presenting images in response to receipt of imagewise rays of light 22 projected from, for example, a video projector. The polarizing screen 20 is made of a woven polarizing fabric 1 which has front and rear surfaces D and E opposite to each other and which is woven in a satin fashion including warps of one of polarizing and non-polarizing threads 12 and 11 and wefts of the other of the polarizing and non-polarizing threads 12 and 11. The front surface D of the woven polarizing fabric 1 has a relatively large portion of the polarizing threads 12 being exposed therefrom and the rear surface E thereof has a relatively large portion of the non-polarizing threads 11 exposed therefrom. The polarizing threads 12 of the woven polarizing fabric 1 have their lengthwise direction oriented substantially perpendicular to a horizontal plane and, therefore, the horizontal viewing angle is increased. Also, the front surface D of the woven polarizing fabric 1 where the relatively large portion of the polarizing threads 12 are exposed is oriented so as to confront the viewers 23 so that the woven polarizing fabric 1 can exhibit an enhanced function of a polarizing filter.

REFERENCES:
patent: 2362573 (1944-11-01), MacNeille
patent: 2380241 (1945-07-01), Jelley et al.
patent: 2793361 (1957-05-01), White
patent: 3319519 (1967-05-01), Shelanski
patent: 4884131 (1989-11-01), Chevion et al.
patent: 5086354 (1992-02-01), Bass et al.
patent: 5148309 (1992-09-01), Yamada et al.
patent: 5251065 (1993-10-01), Uetsuki
English Abstract of a Japanese Patent #5-197026, Masao Uetsuki, Polarizing Screen and Projector Using the Same, Aug. 6, 1993.
English Abstract of a Japanese Patent #3-287244, Takehisa Natori, Screen for Projector, Dec. 17, 1991.
English Abstract of a Japanese Patent #4-29127, Kazuhiro Tachibana, Transmission Type Screen and Transmission Type Screen Assembly, Jan. 31, 1992.
English Abstract of a Japanese Patent #4-63333, Masaharu Hara, Polarizing Screen for Liquid Crystal Projector, Feb. 28, 1992.

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