Optics: measuring and testing – Position or displacement – Triangulation
Reexamination Certificate
2003-08-29
2009-12-15
Toatley, Jr., Gregory J (Department: 2886)
Optics: measuring and testing
Position or displacement
Triangulation
C356S003100, C356S152300, C356S364000
Reexamination Certificate
active
07633633
ABSTRACT:
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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Search report from corresponding application No. 04 010 829.2 dated Nov. 2, 2006.
Baney Douglas M.
DePue Marshall T.
Xie Tong
Avago Technologies ECBU (IP) Singapore Pte. Ltd.
Pajoohi Tara S
Toatley Jr. Gregory J
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