Open AccessDesign of compact and ultra efficient aspherical lenses for extended Lambertian sources in two-dimensional geometry
Author(s) -
Rengmao Wu,
Hong Hua,
Pablo Benı́tez,
Juan C. Miñano,
Rongguang Liang
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.005078
Subject(s) - optics , parabola , geometrical optics , nonimaging optics , surface (topology) , ray tracing (physics) , computer science , extensibility , compact space , geometry , physics , mathematics , mathematical analysis , operating system
The energy efficiency and compactness of an illumination system are two main concerns in illumination design for extended sources. In this paper, we present two methods to design compact, ultra efficient aspherical lenses for extended Lambertian sources in two-dimensional geometry. The light rays are directed by using two aspherical surfaces in the first method and one aspherical surface along with an optimized parabola in the second method. The principles and procedures of each design method are introduced in detail. Three examples are presented to demonstrate the effectiveness of these two methods in terms of performance and capacity in designing compact, ultra efficient aspherical lenses. The comparisons made between the two proposed methods indicate that the second method is much simpler and easier to be implemented, and has an excellent extensibility to three-dimensional designs.