Bi-directional Photogoniometer for advanced glazing materials based on digital imaging techniques

The photogoniometer is composed of a computer-controlled movable mechanical support, presenting two main rotation axes that are powered by DC motors. It uses an accurate and reliable gear technology (harmonic drivers) and is controlled by a micro-computer. The light source is placed 6 meters above. It consists of a short-arc discharge lamp (2.5 kW HMI) combining high luminous efficiency (96 lumen/Watt) with a daylight-close spectum (5600 K); it is placed in a floodlight projector equiped with a hyperbolic mirrored reflector, Fresnel lens and an optical conic element to enhance beam uniformity. A high illuminance uniformity is observed on the sample (better than 3%).


Published in:
International Daylighting, newsletter, University of Sydney, Australia (invited paper), 2-99, 8, 12
Year:
1999
Note:
Invited paper
Laboratories:




 Record created 2011-02-03, last modified 2018-03-17

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