Abstract

A reflectometer design utilizing an integrating sphere with a lens and nonimaging concentrator is described. Compared with previous designs where a collimator was used to restrict the detector field of view, the concentrator–lens combination significantly increases the throughput of the reflectometer. A procedure for designing lens–concentrators is given along with the results of parametric studies. The measured angular response of a lens–concentrator system is compared with ray-trace predictions and with the response of an ideal system.

© 1995 Optical Society of America

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