Laser radar scanning system
First Claim
Patent Images
1. Apparatus for splitting reflected light from transmitted light, comprising:
- an optical system operable to transmit a first, diverging beam of light along a first axis and to receive a second, reflected beam coaxial with the first beam, the second beam having greater cross-sectional area than the first beam, said optical system includinga splitter mirror lying in a plane at an angle to the first axial and having an off-center aperture coaxial with the first beam, the aperture being smaller in area than the second beam, and the mirror being sized to reflect a substantial portion of the second beam.
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Abstract
An apertured mirror permits an outgoing, transmitted laser beam to pass and reflects a return, reflected beam onto a detector array.
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Citations
14 Claims
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1. Apparatus for splitting reflected light from transmitted light, comprising:
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an optical system operable to transmit a first, diverging beam of light along a first axis and to receive a second, reflected beam coaxial with the first beam, the second beam having greater cross-sectional area than the first beam, said optical system including a splitter mirror lying in a plane at an angle to the first axial and having an off-center aperture coaxial with the first beam, the aperture being smaller in area than the second beam, and the mirror being sized to reflect a substantial portion of the second beam.
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2. A laser scanning system, comprising:
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a. a laser light source operable to emit a laser beam along a first optical path; b. a turning mirror being positioned to redirect the laser beam along a second optical path; c. a mirror having an aperture therein, the aperture being off-center and located in the second optical path such that the redirected laser beam passes therethrough; and d. a scanning mirror being positioned in the second optical path to scan the redirected laser beam passing through said aperture along a third optical path. - View Dependent Claims (4, 5, 6)
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3. A method of transmitting and receiving laser light comprising the steps of:
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a. generating a laser beam; b. passing the laser beam through an off-center aperture in a receiving mirror; c. scanning the laser beam in a scan pattern to reflect the beam off a target; d. receiving light of the laser beam reflected from the target; and e. reflecting the received light off the receiving mirror. - View Dependent Claims (7, 8)
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9. A laser scanning system comprising:
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a laser light source operable to emit a laser beam; a mirror having an aperture therein, the aperture being off-center with respect to said mirror and being positioned to pass said laser beam therethrough; a scanning device being positioned to receive said laser beam passing through said aperture, said scanning device redirecting said laser beam along a predetermined path; and an afocal Cassegrainian telescope being positioned to receive said redirected laser beam from said scanning device, said telescope transmitting said laser beam toward a target and receiving reflections of said transmitted laser beam from said target. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification