Hybrid lens system

Details Hybrid lens system Hybrid lens system

2006-06-16

2008-11-04

Pritchett, Joshua L (Department: 2872)

Optical: systems and elements

Lens

Multiple component lenses

C359S715000, C359S569000

Reexamination Certificate

active

07446954

ABSTRACT:
A hybrid lens system includes: a first lens with positive diffractive power, a second lens with negative diffractive power, a third lens with positive diffractive power, and a fourth lens with negative diffractive power. The first lens, the second lens, the third lens and the fourth lens are aligned in that order from an object side to an image side. The first lens is made from a glass material, each of the second lens, the third lens and the fourth lens is made from a plastic material. All of the four lenses are aspheric lenses.

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