title: Optical assessment of nonimaging concentrators.
abstract: An optical measurement method for nonimaging radiation concentrators is proposed. A Lambertian light source is placed in the exit aperture of the concentrator. Looking into the concentrator's entrance aperture from a remote position, one can photograph the transmission patterns. The patterns show the transmission of radiation through the concentrator with the full resolution of the four-dimensional phase space of geometric optics. By matching ray-tracing simulations to the measurement, one can achieve detailed and accurate information about the geometry of the concentrator. This is a remote, noncontact measurement and can be performed in situ for installed concentrators. Additional information regarding small-scale reflector waviness and surface reflectivity can also be obtained from the same measurement with additional analysis.
authors: A
authors: A
authors: Timinger
authors: A
authors: A
authors: Kribus
authors: H
authors: H
authors: Ries
authors: T
authors: T
authors: Smith
authors: M
authors: M
authors: Walther