Imaging lens system

Details Imaging lens system Imaging lens system

2007-01-02

2007-01-02

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S793000, C359S691000

Reexamination Certificate

active

11374596

ABSTRACT:
It is to provide an imaging lens system which, while reduced in size and weight, can fully meet the demand for more improvement in the optical performance and also improvement in the productivity. The imaging lens system comprises, in order from an object side towards an image surface side, a diaphragm, a first lens which is a meniscus lens having a positive power whose concave surface facing the object side, and a second lens which is a meniscus lens having a negative power whose convex surface facing the image surface side, wherein the Abbe number of the second lens is set smaller than the Abbe number of the first lens.

REFERENCES:
patent: 5835281 (1998-11-01), Ohno
patent: 2005/0057679 (2005-03-01), Isono
patent: 2006/0056072 (2006-03-01), Zeng et al.
patent: 03-127014 (1991-05-01), None
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patent: 2003-329921 (2003-11-01), None
patent: 2004-004742 (2004-01-01), None

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