发明名称 |
Position determination that is responsive to a retro-reflective object |
摘要 |
Utilizing frequency-dependent diffraction (also referred to as dispersion) to determine the angular position of a retro-reflective object within a scanning space. The technique involves dispersing an electromagnetic beam into a scanning space by frequency. If a retro-reflective object is located within the scanning space, the object will retro-reflect a portion of the dispersed beam having a frequency that is associated with the angular position of the retro-reflective object within the scanning space. The frequency of the retro-reflected beam is used to determine the angular position of the retro-reflective object within the scanning space. When a second beam is dispersed into the scanning space and a portion of the second beam is retro-reflected in the manner just described, a second angular position of the retro-reflective object can be found. Coordinates of the retro-reflective object are determinable by triangulation using the two angular positions. These are absolute, as opposed to relative, coordinates.
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申请公布号 |
US2005068518(A1) |
申请公布日期 |
2005.03.31 |
申请号 |
US20030652638 |
申请日期 |
2003.08.29 |
申请人 |
BANEY DOUGLAS M.;DEPUE MARSHALL T.;XIE TONG |
发明人 |
BANEY DOUGLAS M.;DEPUE MARSHALL T.;XIE TONG |
分类号 |
G01B11/00;G01S17/48;G06F3/033;G06F3/042;(IPC1-7):G01C3/08;G06K9/00;G01C1/00;G01B11/26 |
主分类号 |
G01B11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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