Multidirectional retroreflectors
First Claim
Patent Images
1. A multi-directional retroreflector comprising:
- a first mirror;
a first retroreflector, wherein the first mirror is positioned to reflect a light beam onto the first retroreflector and wherein the optical path length to the first retroreflector from the first mirror is equal to the optical path length from the first retroreflector mirror to a virtual position point; and
a second retroreflector, wherein the second retroreflector is positioned at one of the virtual position or is positioned point and a position away from the virtual position at a position that has the same optical path length as the optical path length to a second mirror point, wherein, in the position away from the virtual point, the optical path length to the second retroreflector from a second mirror is equal to the optical path length from the second mirror to the virtual point.
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Abstract
Multidirectional retroreflectors and methods of reflecting light beams from multiple directions are provided. The multidirectional retroreflectors utilize a four-mirror retroreflector with a common virtual reflection point.
31 Citations
63 Claims
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1. A multi-directional retroreflector comprising:
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a first mirror;
a first retroreflector, wherein the first mirror is positioned to reflect a light beam onto the first retroreflector and wherein the optical path length to the first retroreflector from the first mirror is equal to the optical path length from the first retroreflector mirror to a virtual position point; and
a second retroreflector, wherein the second retroreflector is positioned at one of the virtual position or is positioned point and a position away from the virtual position at a position that has the same optical path length as the optical path length to a second mirror point, wherein, in the position away from the virtual point, the optical path length to the second retroreflector from a second mirror is equal to the optical path length from the second mirror to the virtual point. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A multi-directional retroreflector comprising:
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a mirror;
a retroreflector, wherein the mirror is positioned to reflect a light beam onto the retroreflector and wherein the optical path length to the retroreflector from the mirror is equal to the optical path length from the retroreflector mirror to a virtual position; and
a cubic, spherical or cylindrical manifold, wherein the mirror and the retroreflector are adjustably mounted to the manifold by an adjustable mount. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method of reflecting one or more light beams from multiple directions comprising:
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reflecting a light beam off of a mirror and onto a retroreflector mounted on a manifold at a first position; and
moving the retroreflector to a second position on the manifold and reflecting a light beam off of beam off of the mirror and the retroreflector mounted at the second position by an adjustable mount, wherein the retroreflector in the first position and the retroreflector in the second position have the same virtual point. - View Dependent Claims (15, 16, 17, 18)
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19. A method of reflecting one or more light beams from multiple directions comprising:
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reflecting a light beam off of a first mirror and onto a first retroreflector, wherein the optical path length to the first retroreflector from the first mirror is equal to the optical path length from the first retroreflector mirror to a virtual position point; and
reflecting a light beam off of a second retroreflector, wherein the second retroreflector is positioned at one of the virtual position or is positioned point and a position away from the virtual position at a position that has the same optical path length as the optical path length to a second mirror. point, wherein, in the position away from the virtual point, the optical path length to the second retroreflector from a second mirror is equal to the optical path length from the second mirror to the virtual point. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A distance measuring device comprising:
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a first reflective surface;
a first reflector, wherein the first reflective surface is positioned to reflect electromagnetic waves onto the first reflector and wherein the path length to the first reflector from the first reflective surface is equal to the path length from the first reflective surface to a virtual point; and
a second reflector, wherein the second reflector is positioned at one of the virtual point and a position away from the virtual point, wherein, in the position away from the virtual point, a second reflective surface is positioned to reflect electromagnetic waves onto the second reflector and the path length to the second reflector from the second reflective surface is equal to the path length from the second reflective surface to the virtual point. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method of reflecting at least two electromagnetic waves from multiple directions comprising:
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reflecting a first electromagnetic wave off of a first reflective surface and onto a first reflector, wherein the path length to the first reflector from the first reflective surface is equal to the path length from the first reflective surface to a virtual point; and
reflecting a second electromagnetic wave off of a second reflector, wherein the second reflector is positioned at one of the virtual point and a position away from the virtual point, wherein, in the position away from the virtual point, a second reflective surface is positioned to reflect electromagnetic waves onto the second reflector and the path length to the second reflector from the second reflective surface is equal to the path length from the second reflective surface to the virtual point. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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50. A method of reflecting at least two electromagnetic waves in multiple directions virtually originating from a common point comprising:
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reflecting a first electromagnetic wave from a first reflector off of a first reflective surface in a first direction beam, wherein the optical path length from the first reflector to the first reflective surface is equal to the optical path length from the first reflective surface to a virtual point; and
reflecting a second electromagnetic wave from a second reflector in a second direction beam, wherein the second reflector is positioned at one of the virtual point and a position away from the virtual point, wherein, in the position away from the virtual point, a second reflective surface is positioned to reflect the second electromagnetic wave onto the second reflector and the optical path length from the second reflector to the second reflective surface is equal to the optical path length from the second reflective surface to the virtual point;
wherein the first direction beam and the second direction beam intersect at the virtual point. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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Specification