Optical: systems and elements – Lens
Reexamination Certificate
2006-04-13
2008-09-16
Sugarman, Scott J. (Department: 2873)
Optical: systems and elements
Lens
C359S649000, C359S652000, C359S653000, C359S654000
Reexamination Certificate
active
07426079
ABSTRACT:
At least one exemplary embodiment is directed to A retro focus optical system that is capable of sufficiently correcting and/or reducing various aberrations including the chromatic aberration. The optical system includes a refractive optical element including a solid material. The Abbe number νd and the partial dispersion ratio θgF of the solid material along with a shape of the refractive optical element can reduce various aberrations.
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Canon Kabushiki Kaisha
Canon U.S.A. Inc. I.P. Division
Sugarman Scott J.
Thomas Brandi N
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