Winston collector

Compound parabolic concentrator (CPC, also called Winston collector or Winston cone) [95-97] is a reflective nonimaging light concentrator intended to collect incident light from a spatial angle larger than that of imaging concentrators and to... 

A special case of the rotational Winston collector is a CPC trough. Both 2D and 3D CPC structures are ideal concentrators. 2D CPC is convenient if the target travels along a line since then there is no need for its tracking. 

Due to the relaxation of the requirement to form images, some nonimaging collectors, called ideal collectors, are able to reach the maximum possible collection of lighf for a given concentration ratio. In particular, the maximum concentration ratio of line focusing solar collectors is given by (Rabl, 1976,1985 Winston et al, 2005)... 

Rabl, A., O Gallagher, J., and Winston, R. (1980). Design and test of non-evacuated solar collectors with compound parabolic concentrators, Solar Energy 25,335. 

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