Determination of accuracy of measurements by NREL`s Scanning Hartmann Optical Test instrument Metadata

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  • Main Title Determination of accuracy of measurements by NREL`s Scanning Hartmann Optical Test instrument


  • Author: Jorgensen, G.
    Creator Type: Personal
  • Author: Wendelin, T.
    Creator Type: Personal
  • Author: Carasso, M.
    Creator Type: Personal


  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)


  • Name: National Renewable Energy Laboratory (U.S.)
    Place of Publication: Golden, Colorado
    Additional Info: National Renewable Energy Lab., Golden, CO (United States)


  • Creation: 1991-04-01


  • English


  • Content Description: NREL`s Scanning Hartmann Optical Test (SHOT) instrument is routinely used to characterize the surface of candidate dish concentration elements for solar thermal applications. An approach was devised to quantify the accuracy of these measurements. Excellent reproducibility was exhibited and high confidence established. The SHOT instrument was designed to allow the surface figure of large optical test articles to be accurately specified. Such test articles are nominally parabolic with an f/D ratio (in which f=focal length and D=aperture diameter) in the range of 0.5--1.0. Recent modifications of SHOT have extended the characterization range out to about f/D=3.0. A series of experiments was designed to investigate and quantify the uncertainties associated with optical characterization performed by SHOT. This approach involved making a series of measurements with an arbitrary test article positioned at a number of locations transverse to the optical axis of SHOT. 3 refs.
  • Physical Description: 7 p.


  • Keyword: Errors
  • STI Subject Categories: 14 Solar Energy
  • Keyword: Testing
  • Keyword: Parabolic Dish Collectors
  • Keyword: Solar Thermal Power Systems
  • Keyword: Optical Systems
  • Keyword: Solar Flux
  • Keyword: Measuring Methods 141000
  • STI Subject Categories: 140700
  • Keyword: Solar Collectors And Concentrators
  • Keyword: Surface Properties
  • Keyword: Accuracy
  • Keyword: Solar Thermal Conversion


  • Conference: World congress of the International Solar Energy Society,Denver, CO (United States),19-23 Aug 1991


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article


  • Text


  • Other: DE92010571
  • Report No.: NREL/TP--257-4190
  • Report No.: CONF-910802--6
  • Grant Number: AC02-83CH10093
  • Office of Scientific & Technical Information Report Number: 10151016
  • Archival Resource Key: ark:/67531/metadc1311642


  • Display Note: OSTI; NTIS; GPO Dep.