发明授权
- 专利标题: Position determination that is responsive to a retro-reflective object
- 专利标题(中): 响应于反光对象的位置确定
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申请号: US10652638申请日: 2003-08-29
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公开(公告)号: US07633633B2公开(公告)日: 2009-12-15
- 发明人: Douglas M. Baney , Marshall T. DePue , Tong Xie
- 申请人: Douglas M. Baney , Marshall T. DePue , Tong Xie
- 申请人地址: SG Singapore
- 专利权人: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
- 当前专利权人: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
- 当前专利权人地址: SG Singapore
- 主分类号: G01J4/00
- IPC分类号: G01J4/00 ; G01C1/00
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.