Compact imaging lens system

Details Compact imaging lens system Compact imaging lens system

2008-01-08

2008-01-08

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S795000

Reexamination Certificate

active

07317585

ABSTRACT:
A compact imaging lens system consists of a first positive aspheric lens element (1) on the object side and a second negative aspheric lens element (2) on the image side. The first lens element is a meniscus lens convex toward the image side, whereby the incident light beam can be diverged by the first concave surface (11) of the first lens element, and thus a wide area of the second convex surface (12) of the first lens element can be illuminated by the divergent light beam. The second negative aspheric lens element is provided mainly for correcting chromatic aberration and off-axis aberration.

REFERENCES:
patent: 6031670 (2000-02-01), Inoue
patent: 6067196 (2000-05-01), Yamamoto et al.
patent: 6441971 (2002-08-01), Ning
patent: 2006/0072200 (2006-04-01), Yamada

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