Video Scanning Hartmann Optical Tester (VSHOT) Uncertainty Analysis: Preprint

Research output: Contribution to conferencePaper


This purely analytical work is based primarily on the geometric optics of the system and shows sensitivities to various design and operational parameters. We discuss sources of error with measuring devices, instrument calibrations, and operator measurements for a parabolic trough test. In this paper, we include both the random (precision) and systematic (bias) errors for VSHOT testing and theircontributions to the uncertainty. The contributing factors that we considered in this study are target tilt, target face to laser output distance, instrument vertical offset, scanner tilt, distance between the tool and the test piece, camera calibration, and scanner/calibration.
Original languageAmerican English
Number of pages11
StatePublished - 2010
EventSolarPACES 2010 - Perpignan, France
Duration: 21 Sep 201024 Sep 2010


ConferenceSolarPACES 2010
CityPerpignan, France

NREL Publication Number

  • NREL/CP-5500-49305


  • mirror testing
  • optical characterization
  • parabolic trough
  • slope error


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