Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Patent
1992-07-29
1993-10-05
Wintercorn, Richard A.
Optical: systems and elements
Projection screen
Unitary sheet comprising plural refracting areas
358 61, 359486, G03B 2160, H04N 931
Patent
active
052510654
ABSTRACT:
A polarizing screen for visually presenting a picture in response to receipt of projected imagewise rays of light having a polarizing fabric overlaying a first surface of the screen base facing a viewer and operable to pass therethrough the projected imagewise rays of light having the first polarizing direction, but absorb rays of light having a second polarizing direction. The polarizing fabric includes a plurality of juxtaposed polarizing fibers and a plurality of juxtaposed non-polarizing fibers interlaced with the juxtaposed polarizing fibers so as to extend perpendicular to said juxtaposed polarizing fibers. Instead of the polarizing fabric, a non-woven sheet having the polarizing fibers juxtaposed thereon may be used. With this polarizing screen including the polarizing fabric or the polarizing fibers capable of polarizing rays of light having a polarizing direction conforming to the polarizing direction of the projected rays of light, the picture projected on the polarizing screen can be kept at a high contrast. The polarizing fabric 2 or the polarizing fibers can easily be prepared not only in a large flat shape, but also in a curved shape.
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Kuraray Co. Ltd.
Wintercorn Richard A.
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