23 June 2015 Design of freeform reflector array for oblique illumination in general lighting
Author Affiliations +
Optical Engineering, 54(6), 065103 (2015). doi:10.1117/1.OE.54.6.065103
With increasing concerns about light pollution and energy waste in general lighting, efficient and effective lighting techniques have become imperative. We present the design of a kind of dedicated oblique illumination (OI) system to solve the problems of light pollution and the waste of energy in general lighting. The OI system consists of an extended (actual) light source, a collimator, and a freeform reflector array. Two different layouts of the OI system are proposed for different lighting situations, and design models of the two layouts are also given by use of the Monge–Ampère equation method. Two typical lighting situations, street lighting and advertising board lighting, are given here to illustrate the proposed OI system, and characteristics of the OI system are explored. The results show the light distribution is well controlled with a pretty good optical performance and the OI system has a large tolerance to the change of intensity distribution of the light source and to the size of the light source.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Enguo Chen, Rengmao Wu, "Design of freeform reflector array for oblique illumination in general lighting," Optical Engineering 54(6), 065103 (23 June 2015). https://doi.org/10.1117/1.OE.54.6.065103

Light sources and illumination


Light sources

General lighting

Reflector design




Large Area Illumination
Proceedings of SPIE (February 23 1987)
An analytical approach to the design of efficient reflectors
Proceedings of SPIE (September 18 2007)
LED luminaire with controlled light distribution
Proceedings of SPIE (September 12 2006)

Back to Top