Imaging lens including three lens components

Details Imaging lens including three lens components Imaging lens including three lens components

2006-07-04

2006-07-04

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S689000

Reexamination Certificate

active

07072123

ABSTRACT:
An imaging lens includes, in order from the object side: a first lens component with a convex surface on the object side near the optical axis; a second lens component with a meniscus shape and a concave surface on the object side near the optical axis; and, a third lens component of positive refractive power with a convex surface on the object side. The first and second lens components may include aspheric surfaces and be made of plastic, and the third lens component may be made of glass. A stop may be placed on the object side of the first lens component or between the first lens component and the second lens component. Each lens component that forms the imaging lens may consist of a lens element. Specified conditions are satisfied in order to reduce aberrations and to insure that a sufficient back focus is provided.

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patent: 2005/0094292 (2005-05-01), Cahall et al.
patent: 10-301022 (1998-11-01), None

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