Rear projection television screen having a multi-surface Fresnel

Details Rear projection television screen having a multi-surface Fresnel Rear projection television screen having a multi-surface Fresnel

1983-04-21

1984-11-13

Wintercorn, Richard A.

G03B 2160

Patent

active

044822065

ABSTRACT:
A rear projection television receiver comprising a rear projection screen that incorporates a compound Fresnel field lens. The field lens comprises two circular Fresnel lenses that together provide the total refraction for the light impinging on the screen. The angle of incidence of the light striking the individual Fresnel elements is reduced, thereby reducing the amount of light reflected from the Fresnel surfaces. The screen efficiency, especially near the edges of the screen, is thereby increased.

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