Projection lens system

Details Projection lens system Projection lens system

1988-04-29

1990-08-14

Sugarman, Scott J.

350412, G02B 1318

Patent

active

049482378

ABSTRACT:
In a projection system wherein an optical system comprising a first lens for correcting a spherical aberration dependent on the aperture length, a second lens for enlargement and a third lens for correcting a field curvature, projects an image reproduced on a CRT having a curved phosphor surface, onto a screen, the third lens is spaced from the CRT so that the region of the phosphor surface which again totally reflects a light which has been totally reflected by a screen-side surface of the third lens is limited to the edge portion of an effective region of the phosphor surface.

REFERENCES:
patent: 4699476 (1987-10-01), Clarke
patent: 4699477 (1987-10-01), Clarke
patent: 4824224 (1989-04-01), Fukuda et al.

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