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Experimental and raytrace results for throat-to-throat compound parabolic concentratorsCompound parabolic concentrators are nonimaging cone-shaped optics with useful angular transmission characteristics. Two cones used throat-to-throat accept radiant flux within one well-defined acceptance angle and redistribute it into another. If the entrance cone is fed with Lambertian flux, the exit cone produces a beam whose half-angle is the exit cone's acceptance angle and whose cross section shows uniform irradiance from near the exit mouth to infinity. (The pair is a beam angle transformer). The design of one pair of cones is discussed, also an experiment to map the irradiance of the emergent beam, and a raytracing program which models the cones fed by Lambertian flux. Experimental results compare favorably with raytrace results.
Document ID
Document Type
Reprint (Version printed in journal)
Leviton, D. B. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Leitch, J. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
August 15, 1986
Publication Information
Publication: Applied Optics
Volume: 25
ISSN: 0003-6935
Subject Category
Distribution Limits