Imaging lens

Details Imaging lens Imaging lens

2011-06-07

2011-06-07

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S793000

Reexamination Certificate

active

07957080

ABSTRACT:
It is to provide an imaging lens that can improve optical performance while reducing size and weight.An imaging lens includes, in order from an object side to an image surface side: a diaphragm2, a first lens3having a positive power whose convex surface faces the object side, and a second lens4that is a meniscus lens having a negative power whose convex surface faces the object side, wherein a condition expressed by the following expression is to be satisfied: 0.4≦r1/FL≦0.55 (where, r1: center radius curvature of the object side face3aof the first lens, and FL: focal distance of the entire lens system).

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