Single focus wide-angle lens module

Details Single focus wide-angle lens module Single focus wide-angle lens module

2009-12-11

2011-10-04

Spector, David N (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S715000

Reexamination Certificate

active

08031413

ABSTRACT:
A single focus wide-angle 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, the diaphragm, the second lens, the third lens and the fourth lens. The first lens has a concave surface on the image side and at least one aspheric surface. The second lens has a positive refractive power, a concave surface on the object side and at least one aspheric surface. The third lens has a meniscus shape, a negative refractive power, a concave surface on the object side and at least one aspheric surface. The fourth lens has a positive refractive power, a convex surface on the object side and at least one aspheric surface.

REFERENCES:
patent: 7911715 (2011-03-01), Shinohara

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