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US 5,790,314 AGranted
Grin lensed optical device
AssigneeJDS Fitel Inc.
InventorsGary S. Duck, Yihao Cheng
Life of this patent
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AssigneeJDS Fitel Inc.
InventorsGary S. Duck, Yihao Cheng
Estimating the term…
An optical device is disclosed wherein a first GRIN lens and a second GRIN lens having their optical axes offset. The first GRIN lens has one or more input ports at an input end. The second GRIN lens is disposed to receive light from the first GRIN lens. A reflecting surface is coated onto a second end face of the second GRIN lens or alternatively is disposed adjacent to the second end face and positioned to reflect an input beam of light launched into the input end face of the first GRIN lens. The reflective surface is at a location where light incident upon it to be returned to the first GRIN lens is collimated. By placing a filter and third GRIN lens between the first and second lenses double filtering may be achieved at the pass band or pass wavelength of the filter. Furthermore, the more simple arrangement including only first and second lenses provides a means of directing light into and out of the device at different angles or directions with respect to the optical axis of the first lens.
An optical device comprising:
An optical device comprising:
An optical device comprising:
An optical device comprising:
Dependencies are inferred from the claim text.