Wide-angle imaging lens module

Details Wide-angle imaging lens module Wide-angle imaging lens module

2011-04-26

2011-04-26

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

Reverse telephoto

C359S715000, C359S781000

Reexamination Certificate

active

07933077

ABSTRACT:
A wide-angle imaging lens module includes a fixed aperture diaphragm, a first lens, a second lens, a third lens and a fourth lens arranged from an object side to an image side in a sequence of: the first lens of a negative refractive power with a meniscus shape, having a concave surface on the image side and at least one aspheric surface; the diaphragm; the second lens of a positive refractive power, having a convex surface on the object side and at least one aspheric surface; the third lens of a negative refractive power, having a concave surface on the image side and at least one aspheric surface; the fourth lens of a positive refractive power, having a convex surface on the object side and at least one aspheric surface.

REFERENCES:
patent: 5251073 (1993-10-01), Schauss
patent: 6775074 (2004-08-01), Kasahara

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