VSHOT measurements of Distal II dish concentrators

Conference · Thu Jul 01 00:00:00 EDT 1999

OSTI ID:20030578

Jones, S A

The Video Scanning Hartmann Optical Tester (VSHOT) is a laser ray-trace tool for measuring the slope error of solar concentrator mirrors. The VSHOT measurements made on two, 8.5-m diameter, Distal II dishes represent its first use on a concentrator installed and operating in the field. A number of valuable lessons were learned regarding the use of the VSHOT for outdoor testing. The two dishes were found to have overall figure-of-merit RMS slope errors from an ideal parabola of 2.99 and 3.18 milliradians. The VSHOT measurements compare well qualitatively with distant observer photographs made using a colored concentric ring target.

• Research Organization: Sandia National Lab., Albuquerque, NM (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 20030578
• Resource Relation: Conference: Renewable and advanced energy systems for the 21st Century, Maui, HI (US), 04/11/1999--04/15/1999; Other Information: 1 CD-ROM. Operating system required: Windows i386, i486, Pentium or Pentium Pro, MS Windows 3.1, 95 or NT3.51; Macintosh, Power Macintosh with a 68020 or greater processor, System software version 7.1, 3.5 MB RAM; UNIX; PBD: 1999; Related Information: In: Renewable and advanced energy systems for the 21st century, RAES'99: Proceedings, by Hogan, R.; Kim, Y.; Kleis, S.; O'Neal, D.; Tanaka, T. [eds.], [1125] pages.
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
PARABOLIC DISH REFLECTORS
MIRRORS
OPTICAL PROPERTIES
MEASURING INSTRUMENTS
PERFORMANCE