Imaging lens and image pickup apparatus

Details Imaging lens and image pickup apparatus Imaging lens and image pickup apparatus

2008-08-20

2010-06-29

Spector, David N (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S781000

Reexamination Certificate

active

07746572

ABSTRACT:
An imaging lens comprises, in order from an object side: a first lens that has a negative refractive power and is convex toward the object side; a second lens that has a positive refractive power and is a meniscus lens convex toward the object side; a stop; a third lens that has a positive refractive power and is convex toward an image side; and a cemented lens that has a positive refractive power as a whole and is formed by cementing a fourth lens and a fifth lens, wherein assuming that an Abbe number of the second lens with respect to d-line is ν2, a distance on an optical axis from a vertex of a surface of the first lens facing toward the object side to an image plane of the imaging lens is L, a focal length of the imaging lens is f, and a back focus of the imaging lens is Bf, the following conditional expressions (1) to (3) are satisfied:in-line-formulae description="In-line Formulae" end="lead"?ν2>30  (1),in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?2.5<L/f<4.0  (2), andin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.5<Bf/f<1.3  (3).in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 6956703 (2005-10-01), Saito et al.
patent: 7636205 (2009-12-01), Yamamoto
patent: 7639432 (2009-12-01), Asami
patent: 2004/0240081 (2004-12-01), Saito et al.
patent: 1-265216 (1989-10-01), None
patent: 2004-61763 (2004-02-01), None
patent: 2004-145256 (2004-05-01), None
patent: 2004-354888 (2004-12-01), None
patent: 3723637 (2005-09-01), None

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