Projection optical system for a liquid crystal projector

Details Projection optical system for a liquid crystal projector Projection optical system for a liquid crystal projector

G - Physics

02

B

G02B 27/18 (2006.01) H04N 5/74 (2006.01)

Patent

CA 2137198

A projection optical system for a liquid crystal projector having a plurality of lenses and projecting an image from liquid crystal display devices onto a screen includes a front lens portion having a meniscus lens, a first concave lens, a convex lens and a second concave lens sequentially arranged from the furthermost of an image plane; and a rear lens portion having two plano-convex lenses positioned between the front lens portion and image plane (display screen), with the flat surfaces thereof facing the image plane. The projection optical system for a liquid crystal projector has a compact size and can project focused images on the screen by adjusting the distance between the front and rear lens portions.

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