Pupil conjugate-coupling device in projecting optical system

Details Pupil conjugate-coupling device in projecting optical system Pupil conjugate-coupling device in projecting optical system

1993-11-17

1995-08-15

Cuchlinski, Jr., William A.

Optics: image projectors

Distortion compensation

353 70, G03B 2114

Patent

active

054424135

ABSTRACT:
A pupil conjugate-coupling device in a projecting optical system includes a first projection lens system which forms an intermediate image of an image indicating element, a second projection lens system which projects the intermediate image onto a screen, said first and second projection lens systems having optical axes intersecting at a predetermined angle, and an optical element having structural periodicity positioned between the first and second projection lens systems. The optical element has a positive power and a prism function for deflecting a bundle of rays transmitted through the first projection lens system towards the optical axis of the second projection lens system to thereby couple pupils of the first and second projection lens systems. The optical element is deviated from an intermediate image forming position by a predetermined offset in the optical axis direction thereof.

REFERENCES:
patent: 3253505 (1966-05-01), Miller
patent: 4089599 (1978-05-01), Kuboshima
patent: 4436392 (1984-03-01), Vanderwerf
patent: 5032022 (1991-07-01), Sato et al.
patent: 5220363 (1993-06-01), Sato et al.
patent: 5274406 (1993-12-01), Tejima et al.
patent: 5302983 (1994-04-01), Sato et al.

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