Grin lensed optical device
First Claim
1. An optical device comprising:
- a first GRIN lens and a second GRIN lens having their optical axes offset, the first GRIN lens having at least an input port at an input end face thereof, the second GRIN lens being disposed to receive light from the first GRIN lens at a first end face thereof;
an at least partially reflecting surface on or about a second end face of the second GRIN lens and positioned to reflect an input beam of light launched into the input end face of the first GRIN lens.
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Accused Products
Abstract
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.
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Citations
19 Claims
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1. An optical device comprising:
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a first GRIN lens and a second GRIN lens having their optical axes offset, the first GRIN lens having at least an input port at an input end face thereof, the second GRIN lens being disposed to receive light from the first GRIN lens at a first end face thereof; an at least partially reflecting surface on or about a second end face of the second GRIN lens and positioned to reflect an input beam of light launched into the input end face of the first GRIN lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An optical device comprising:
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a) a first GRIN lens having a focusing end and a substantially collimating end, the focusing end having at least two ports, at least one being an input port and at least one being an output port, b) a second GRIN lens having a substantially collimating end face and a substantially focusing end face, an at least partially reflective element at or about the substantially collimating end face to reflect input light to the at least one output port on the focusing end of the first GRIN lens; and
,c) an optical element disposed between the substantially collimating end faces of the first and second GRIN lenses, the first and second GRIN lenses having optical axes which are offset, such that the first and second GRIN lenses are not coaxial with one another. - View Dependent Claims (12, 13, 14, 15)
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16. An optical device comprising:
a first and second GRIN lens, the lenses each having a collimating end and a focusing end, one of the focusing and collimating ends of the first GRIN lens facing the same on the second GRIN lens, the second GRIN lens having a reflective surface at its outer end face for reflecting light back to the first GRIN lens, the second GRIN lens having its optical axis offset from an optical axis of the first GRIN lens; and
an optical element disposed between inwardly facing end faces of the first and second GRIN lenses.- View Dependent Claims (17)
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18. An optical device comprising:
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a) a WDM filter having two juxtaposed GRIN lenses and a filter element therebetween; and
,b) a third GRIN lens disposed to receive light from one of the two juxtaposed GRIN lenses, a reflective element at or about the third GRIN lens end face for passing at least a portion of a beam back to the two juxtaposed GRIN lenses, the third GRIN lens having its optical axes offset from at least one of the optical axes of the two juxtaposed GRIN lenses. - View Dependent Claims (19)
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Specification