Projection lens

Details Projection lens Projection lens

1986-10-29

1988-09-13

Corbin, John K.

350412, 350471, G02B 1318, G02B 2718, G02B 934

Patent

active

047705132

ABSTRACT:
A projection lens for projecting an image onto a screen includes, in succession from the screen side, a first lens component having a positive refractive power, a second lens component having a positive refractive power and whose both lens surfaces are convex surfaces, a third lens component of meniscus shape having its convex surface facing the screen side, and a fourth lens component having a negative refractive power and whose surface which is adjacent to the screen is a concave surface.

REFERENCES:
patent: 4548480 (1985-10-01), Yamamoto et al.
patent: 4620773 (1986-11-01), Fukuda

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