Wide acceptance angle, high concentration ratio, optical collect

Details Wide acceptance angle, high concentration ratio, optical collect Wide acceptance angle, high concentration ratio, optical collect

1990-03-30

1991-11-05

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Photoelectric

Cells

136246, 126439, 359853, 359859, H01L 31052, F24J 218

Patent

active

050628992

ABSTRACT:
A cassegrain optical system provides improved collection of off-axis light yet is still characterized by a high concentration ratio. The optical system includes a primary mirror for collecting incoming light and reflecting the light to a secondary mirror which, in turn, reflects the light to a solar cell or other radiation collection device. The primary mirror reflects incoming on-axis light onto an annular section of the secondary mirror and results in the reflection of a substantial amount of incoming off-axis light onto the remainder of the secondary mirror. Thus light which would otherwise be lost to the system will be captured by the collector. Furthermore, the off-axis sections of the secondary mirror may be of a different geometrical shape than the on-axis annular section so as to optimize the amount of off-axis light collected.

REFERENCES:
patent: 4131485 (1978-12-01), Meinel et al.

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