Optics: measuring and testing – Range or remote distance finding – With photodetection
Reexamination Certificate
2011-08-02
2011-08-02
Tarcza, Thomas H (Department: 3662)
Optics: measuring and testing
Range or remote distance finding
With photodetection
C356S003010, C356S003100, C356S003150, C356S004010, C356S004100
Reexamination Certificate
active
07990522
ABSTRACT:
In a chromatic point sensor, distance measurements are based on a distance-indicating subset of intensity profile data, which is selected in a manner that varies with a determined peak position index coordinate (PPIC) of the profile data. The PPIC indexes the position a profile data peak. For profile data having a particular PPIC, the distance-indicating subset of the profile data is selected based on particular index-specific data-limiting parameters that are indexed with that same particular PPIC. In various embodiments, each set of index-specific data-limiting parameters indexed with a particular PPIC characterizes a distance-indicating subset of data that was used during distance calibration operations corresponding to profile data having that PPIC. Distance-indicating subsets of data may be compensated to be similar to a corresponding distance-indicating subset of data that was used during calibration operations, regardless of overall intensity variations and detector bias signal level variations.
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Christensen O'Connor Johnson & Kindness PLLC
Mitutoyo Corporation
Ratcliffe Luke D.
Tarcza Thomas H
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