Imaging lens system and imaging apparatus

Details Imaging lens system and imaging apparatus Imaging lens system and imaging apparatus

2008-12-12

2010-02-16

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S761000

Reexamination Certificate

active

07663814

ABSTRACT:
The imaging lens system includes a negative first lens disposed on a most object side, having a concave surface directed toward the object side and having a meniscus shape, a cemented lens LC disposed on a most image side and having a convex surface on its most object side, and an aperture diaphragm disposed just in front of the object side of the cemented lens. The system satisfies the following conditional expressions:in-line-formulae description="In-line Formulae" end="lead"?0.05<(R2−R1)/(R1+R2)<0.25in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?vd1 −vd2 >15in-line-formulae description="In-line Formulae" end="tail"?whereR1and R2denote radius of curvatures of object side and image side surfaces of the first lens, respectively, andvd1and vd2denote Abbe numbers of lenses, which are located on the most object side and on the most image side among lenses constituting the cemented lens, at the d-line, respectively.

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