Thermal stability of laser tracking interferometer calibration

Scott C. Sandwith

doi:10.1117/12.370250

16 November 1999 Thermal stability of laser tracking interferometer calibration

Scott C. Sandwith

Proceedings Volume 3835, Three-Dimensional Imaging, Optical Metrology, and Inspection V; (1999) https://doi.org/10.1117/12.370250
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

Uncompensated thermomechanical errors in laser tracking interferometers are examined by evaluating the difference between tracking interferometer compensations in a controlled laboratory environment versus being compensated in a factory environment. The hypothesis under test was that compensation in a factory environment does not adversely affect, and may actually improve, the uncertainty of laser tracker systems. This hypothesis was confirmed by measuring a standard (i.e., linear interferometer) using laboratory- compensated and certified instruments, and then compensating the instrument in the factory environment and re-measuring the standard. The results showed that in-shop compensation generates less variation in the measurement of the standard when compared to the laboratory-compensated and certified instruments. Certified weather stations are used to compensate for the uncontrolled atmospheric effects on the range measurement.

Citation Download Citation

Scott C. Sandwith "Thermal stability of laser tracking interferometer calibration", Proc. SPIE 3835, Three-Dimensional Imaging, Optical Metrology, and Inspection V, (16 November 1999); https://doi.org/10.1117/12.370250

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