Optical module for a semiconductor light-emitting device
AssigneeNippon Sheet Glass Co., Ltd.
InventorHideki Hashizume
Life of this patent
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Abstract
An optical module includes a semiconductor light-emitting device and a lens structure, which are held by a housing while being optically aligned with each other. A ferrule of an optical plug to which the optical module is to be coupled is fittingly received by the housing. The lens structure includes a pair of cylindrical lens portions, which are oriented orthogonal to each other and located at positions spaced from each other in the optical axis direction.
Claims12
An optical module comprising:
- a housing;
- a semiconductor light-emitting device;
- and
- a lens structure,
- wherein the semiconductor light-emitting device and the lens structure are held by the housing and optically aligned with each other, and
- wherein the lens structure includes a pair of cylindrical lens portions, which are oriented orthogonal to each other and located at positions spaced from each other in an optical axis direction, and wherein each of the cylindrical lens portions is profiled as a non-spherical surface defined by
- Z=((1/R)X2)/(1+(1+K(1/R)2X2)½)
- where z is an amount of cutting measured from a planar surface, and R and K are constants.
A lens for shaping an optical radiation pattern, wherein the lens is formed into a one-piece member having an integral base and integral cylindrical lens portions that are located on respective sides of the base and that are oriented orthogonal to each other wherein each of the cylindrical lens portions is profiled as a non-spherical surface defined by
- z=((1/R)X2)/(1+(1+K(1/R)2X2)½)
- where z is an amount of cutting measured from a planar surface, and R and K are constants.
Dependencies are inferred from the claim text.