Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2004-11-19
2009-08-25
Le, Uyen Chau N (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
Reexamination Certificate
active
07580601
ABSTRACT:
A beam focusing lens having an optical axis for focusing at a point of focus a light beam having different angles of divergence in orthogonal directions perpendicular to the optical axis consists of one or two lens components, each of which may be a single lens element and made of plastic and each of which has positive refractive power. At least one lens surface is an anamorphic aspherical surface that is not a cylindrical surface, that has no cross-section perpendicular to the optical axis that is circular with a finite radius of curvature, and that is defined by a particular aspherical equation. Another lens surface may be a cylindrical aspherical surface defined by another particular aspherical equation. The beams focusing lens may satisfy certain conditions related to optical element spacings, refractive index of a single lens element, and magnifications, and may focus light from a semiconductor laser into an optical fiber.
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Katsuma Toshiaki
Noguchi Koichi
Arnold Bruce Y.
Arnold International
Fujinon Corporation
Henry Jon W.
Le Uyen Chau N
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