Conically scanned holographic lidar telescope
First Claim
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1. An optical scanning device comprising:
- a source of optical energy;
a rotating holographic optical element having a stationary focus, said holographic optical element diffracting said source of optical energy at an angle to said rotation axis so as to define a conical scanning area;
means for supporting and rotating said rotating holographic optical element;
a laser transmitting a beam of light to said rotating holographic optical element, said beam of light diffracted by said rotating holographic optical element and thereby emanating outward from said rotting holographic optical element in a conical manner; and
a small high damage threshold mirror attached to the center of said rotating holographic optical element.
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Abstract
An optical scanning device utilizing a source of optical energy such as laser light backscattered from the earth'"'"'s atmosphere or transmitted outward as in a lidar, a rotating holographic optical element having an axis of rotation perpendicular to the plane of its substrate, and having a stationary focus which may or may not be located on its axis of rotation, with the holographic optical element diffracting the source of optical energy at an angle to its rotation axis enabling a conical scanning area and a motor for supporting and rotating the rotating holographic optical element.
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Citations
15 Claims
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1. An optical scanning device comprising:
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a source of optical energy; a rotating holographic optical element having a stationary focus, said holographic optical element diffracting said source of optical energy at an angle to said rotation axis so as to define a conical scanning area; means for supporting and rotating said rotating holographic optical element; a laser transmitting a beam of light to said rotating holographic optical element, said beam of light diffracted by said rotating holographic optical element and thereby emanating outward from said rotting holographic optical element in a conical manner; and a small high damage threshold mirror attached to the center of said rotating holographic optical element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An optical scanning device comprising:
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a source of optical energy; a plurality of rotating holographic optical elements each having a stationary focus, said plurality of holographic optical elements each diffracting a particular wavelength of said source of optical energy at an angle to said rotation axis so as to define a conical scanning area; means for supporting said rotating said plurality of rotating holographic optical element; said plurality of rotating holographic optical elements comprises individual holographic optical elements sandwiched one on top of the other, each transparent to the others wavelengths but diffracting the single wavelength of its design. - View Dependent Claims (14, 15)
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Specification