Imaging lens and imaging device

Details Imaging lens and imaging device Imaging lens and imaging device

2008-01-10

2009-08-25

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S770000

Reexamination Certificate

active

07580205

ABSTRACT:
The imaging lens is provided and includes: in order from the object side, a negative first lens whose concave surface is directed toward the image side; a second lens of a planoconcave lens whose flat surface is directed toward the object side or a biconcave lens whose surface having a larger absolute value of radius of curvature is directed toward the object side; a third biconvex lens; a stop; a positive fourth lens whose surface having a smaller absolute value of radius of curvature is directed toward the image side; and a cemented lens of a positive fifth lens of biconvex shape and a negative sixth lens of meniscus shape, the cemented lens having a positive refractive power, and an Abbe number ν3at d-line of the third lens satisfies a conditional expression (1) ν3<43.

REFERENCES:
patent: 6038085 (2000-03-01), Nakazawa
patent: 7023628 (2006-04-01), Ning
patent: 61-123810 (1986-06-01), None
patent: 2599312 (1997-01-01), None
patent: 2002-98886 (2002-04-01), None

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