Image pick-up lens system

Details Image pick-up lens system Image pick-up lens system

2007-07-03

2007-07-03

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S737000, C359S719000

Reexamination Certificate

active

11254475

ABSTRACT:
An image pick-up lens system includes an aperture stop (10), a biconvex first lens (20), a second lens (30) having a concave surface on an object side, and a third lens (40) having a concave surface on an image side. The aperture stop (10), the first lens (20), the second lens (30) and the third lens (40) are aligned in that order from the object side to the image side. All lenses in the system are made from a plastic or resin material, and one of them has a diffraction grating formed on a surface. The system satisfies conditions (1)-(5) as disclosed, in order to provide compactness, cost-effectiveness and improved optical performance.

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