Projection optical apparatus

Details Projection optical apparatus Projection optical apparatus

1992-10-13

1994-11-01

Cuchlinski, Jr., William A.

Optics: image projectors

Lens support

Lens position adjustable

353122, G03B 2100

Patent

active

053611071

ABSTRACT:
A projection optical apparatus comprises an illuminating device for illuminating an image, and a projecting device for projecting the image illuminated by the illuminating device onto a predetermined plane. In the projection optical apparatus, the projecting device has an NA on a side of the predetermined plane changed depending upon a projection magnification of the image onto the predetermined plane.

REFERENCES:
patent: 4619508 (1986-10-01), Shibuya et al.
patent: 4931830 (1990-06-01), Suwa et al.
patent: 4938572 (1990-07-01), Iwasaki
patent: 4939630 (1990-07-01), Kikuchi et al.
patent: 4974919 (1990-12-01), Muraki et al.
patent: 5038168 (1991-08-01), Kurimoto et al.
patent: 5078487 (1992-01-01), Toyono et al.

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