Optical element such as a rear projection screen for an image di

Details Optical element such as a rear projection screen for an image di Optical element such as a rear projection screen for an image di

1992-08-14

1994-02-22

Wintercorn, Richard A.

Optical: systems and elements

Projection screen

Unitary sheet comprising plural refracting areas

359460, G03B 2156

Patent

active

052893111

ABSTRACT:
An optical element such as a rear projection screen for an image display device comprises at least two substantially rigid sheet members each having a first major surface and a second major surface providing a plane of incidence and a plane of emergence, respectively, through which light is transmitted sequentially. A first sheet member comprises a Fresnel lens, and a second sheet member comprises a lenticular lens array on each of the major surfaces thereof. The plane of emergence on the second major surface of the first sheet member includes the Fresnel lens formed of a radiation curable material. A method of making the Fresnel lens is described.

REFERENCES:
patent: 4414316 (1983-11-01), Conley
patent: 4420527 (1983-12-01), Conley
patent: 4576850 (1986-03-01), Martens
patent: 4656522 (1987-04-01), Piascinski et al.
patent: 5066099 (1991-11-01), Yoshida et al.
patent: 5100222 (1992-03-01), Minoura et al.

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