Imaging lens

Details Imaging lens Imaging lens

2008-05-12

2010-02-16

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S715000, C359S740000, C359S771000

Reexamination Certificate

active

07663815

ABSTRACT:
It is to provide a large-diameter imaging lens that can suppress reduction of peripheral light amount, achieve size and weight reduction, and maintain excellent optical performance.The imaging lens comprises, in order from an object side to an image surface side, a first lens having a positive power whose convex surface faces the image surface side, a diaphragm, a second lens having a negative power whose convex surface faces the image surface side, a third lens having a positive power, and a fourth lens having a negative power, wherein conditions expressed by 0.3≦f/f1≦1.7 and −2.7≦f/f2≦−0.25 (where, f: focal distance of the entire lens system, f1: focal distance of the first lens, and f2: focal distance of the second lens) are to be satisfied.

REFERENCES:
patent: 6813099 (2004-11-01), Yamaguchi
patent: 7295386 (2007-11-01), Taniyama
patent: 7345830 (2008-03-01), Shinohara
patent: 7545587 (2009-06-01), Kubota
patent: 2006/0238898 (2006-10-01), Shinohara
patent: 2007/0081258 (2007-04-01), Huang
patent: 10 2005 015 145 (2006-10-01), None
patent: 1 531 353 (2005-05-01), None
patent: 1 712 944 (2006-10-01), None
patent: 2004-325713 (2004-11-01), None

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