Optical: systems and elements – Lens – Multiple component lenses
Reexamination Certificate
2007-07-24
2007-07-24
Harrington, Alicia M (Department: 2873)
Optical: systems and elements
Lens
Multiple component lenses
C359S715000
Reexamination Certificate
active
11364409
ABSTRACT:
An imaging optical system includes, in order from an object side, a first lens having positive refracting power, a concave surface of which is directed toward the object side, a third lens having positive refracting power, a convex surface of which is directed toward an image side and a fourth lens having negative refracting power, wherein the second lens and the third lens are cemented together. Having such a configuration, an angle made by the incident light and the exiting light to the cemented lens can be kept small, and accordingly, the generation of aberrations at the refracting surface and performance change of lenses when these are in a relative decentering position can be suppressed.
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Harrington Alicia M
Olympus Corporation
Pillsbury Winthrop Shaw & Pittman LLP
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