Imaging lens

Details Imaging lens Imaging lens

2007-02-14

2008-11-18

Choi, William C. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S774000, C359S715000, C359S738000

Reexamination Certificate

active

07453654

ABSTRACT:
An imaging lens is provided and has, in order from the object side, a first lens of a positive lens having a convex surface on the object side thereof; a second lens in a meniscus shape having a concave surface on an image side thereof; a third lens in a meniscus shape having a convex surface on the image side thereof; and a fourth lens of a positive or negative lens, both surfaces of the fourth lens being aspheric and the fourth lens having a concave surface on the image side and in a vicinity of an optical axis of the fourth lens. The Abbe numbers of the first and second lenses as well as the focal distances of the first to fourth lenses satisfies specific conditions.

REFERENCES:
patent: 7206143 (2007-04-01), Kamo et al.
patent: 2002/0181121 (2002-12-01), Kawakami
patent: 2005/0030645 (2005-02-01), Do
patent: 2007/0008625 (2007-01-01), Park et al.
patent: 18922279 (2007-01-01), None
patent: 1-703-309 (2006-09-01), None
patent: 2002-365529 (2002-12-01), None
patent: 2005-24889 (2005-01-01), None
patent: 2005-55751 (2005-03-01), None
patent: 2005-208236 (2005-08-01), None
Wikipedia, The Free Online Encyclopedia, May 9, 2007, Internet pp. 1-10, XP-002433019.

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