Four-piece imaging lens module

Details Four-piece imaging lens module Four-piece imaging lens module

2010-12-20

2011-12-13

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S644000, C359S660000, C359S739000, C359S774000

Reexamination Certificate

active

08077399

ABSTRACT:
A four-piece 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 diaphragm; the first lens of a positive refractive power, having a convex surface on the object side and at least one aspheric surface; the second lens of a negative refractive power with a meniscus shape, having a convex surface on the image side and at least one aspheric surface; the third lens of a positive refractive power with a meniscus shape, having a concave surface on the object side and at least one aspheric surface; the fourth lens of a positive refractive power, having a concave surface on the image side and at least one aspheric surface. The invention is to provide a four-piece imaging lens module with higher definition and higher yield rate.

REFERENCES:
patent: 2009/0185288 (2009-07-01), Taniyama

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