Optical: systems and elements – Lens – Multiple component lenses
Reexamination Certificate
2011-08-09
2011-08-09
Harrington, Alicia M (Department: 2873)
Optical: systems and elements
Lens
Multiple component lenses
Reexamination Certificate
active
07995294
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 diaphragm, a first lens3that is a meniscus lens having a positive power whose convex surface faces the object side, and a second lens4that is a lens having a negative power whose concave surface faces the object side, wherein conditions expressed by the following expressions are to be satisfied: 0.25<r1/r2≦0.45, 0.35≦r1/FL≦0.42, and 0.85≦f1/FL≦1 (where, r1: center radius curvature of the object side face of the first lens, r2: center radius curvature of the image surface side face of the first lens, FL: focal distance of the entire lens system, and f1: focal distance of the first lens).
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DLA Piper (LLP) US
Enplas Corporation
Harrington Alicia M
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