Optics: measuring and testing – For light transmission or absorption – By comparison
Reexamination Certificate
2011-03-22
2011-03-22
Nguyen, Sang (Department: 2886)
Optics: measuring and testing
For light transmission or absorption
By comparison
C356S028500, C250S231130
Reexamination Certificate
active
07911614
ABSTRACT:
The non-contact measurement probe is capable of dimensional measurement of a workpiece while it is being machined, and reporting dynamic error for real-time compensation by the machining tool. Measurement includes diameter and roundness of the workpiece. The measurements are automatically fed back to a machine controller for intelligent error compensation. Based on known laser Doppler techniques and real time data acquisition, the probe delivers dimensional accuracy at few microns over a range of 100 mm. The measurement probe employs a differential laser-Doppler arrangement, allowing acquisition of information from the workpiece surface. Moreover, the measurements are traceable to standards of frequency allowing higher precision.
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Mekid, S. and Vacharanukul, K., “Differential Laser Doppler based Non-Contact Sensor for Dimensional Inspection with Error Propagation Evaluation,” Senors 6(6), pp. 546-556, Jun. 2006.
King Fahd University of Petroleum and Minerals
Litman Richard C.
Nguyen Sang
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