Imaging lens system

Details Imaging lens system Imaging lens system

2007-10-23

2007-10-23

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S785000

Reexamination Certificate

active

11096877

ABSTRACT:
An object is to provide an imaging lens system which can achieve reduction of the size and weight while maintaining the high optical performance. The imaging lens system of the present invention comprises, in order form an object side to an imaging surface side: a first lens having a positive power with its convex surface facing the object side; a second lens in a meniscus shape having a positive power with its concave surface facing the object side; and a third lens functioning as a correction lens, wherein the imaging lens system satisfies following expressions: 0.25<r1/f<0.50, and −0.27<r3/f<−0.19 (where, r1: a radius of center curvature of the surface (first face) of the first lens on the object side, r3: a radius of center curvature of the surface (first face) of the second lens on the object side, f: a focal distance of an entire lens system).

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