Reflection-type screen

Details Reflection-type screen Reflection-type screen

1993-01-11

1994-03-22

Wintercorn, Richard A.

Optical: systems and elements

Projection screen

Unitary sheet comprising plural reflecting areas

359 63, G03B 2160

Patent

active

052969657

ABSTRACT:
A screen of reflection-type operable with linearly polarized imagewise rays of light projected thereon for presenting a projected image, carried by the linearly polarized imagewise rays of light (8), to viewers occupying a position in front of the screen. The screen comprises a polarizing film (6) having first and second surfaces, a metal layer (4) formed on the second surface of the polarizing film (6) for reflecting the linearly polarized imagewise rays of light (8), and an indentation structure formed on both of the metal layer (4) and the polarizing film (6) for reflecting the imagewise rays of light (8) uniformly at a desired angle of reflection. The linearly polarized imagewise rays of light (8) enter the polarizing film (6) through the first surface thereof while the linearly polarized rays of light (8) have a plane of vibration of an electric field or a magnetic field in a direction required to exhibit a maximum light transmissivity. The screen may also be operable with a bundle of imagewise rays of light (8) projected from a projector (1) in the form of a cone of light as spherical waves onto the screen or a bundle of imagewise rays of light (8) projected from a projector as plane or approximately plane waves onto the screen.

REFERENCES:
patent: 3248165 (1966-04-01), Marks et al.
patent: 4592623 (1986-06-01), Yamamoto et al.
patent: 4888343 (1989-11-01), Teshirogi
patent: 5148309 (1992-09-01), Yamada

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