Freeform lens design using a spreadsheet

被引:4
作者
Goldstein, Peter [1 ]
机构
[1] Philips Color Kinet, Burlington, MA USA
来源
NOVEL OPTICAL SYSTEMS DESIGN AND OPTIMIZATION XIII | 2010年 / 7787卷
关键词
LED; freeform lens; midray; midpoint method; uniform illumination; lighting; spreadsheet;
D O I
10.1117/12.858352
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
In illumination optics an important design task is to create a light source with a certain intensity profile. One way to achieve this is to use LEDs and secondary optics that use freeform surfaces. Freeform lens design is a very powerful tool with many sophisticated design techniques. However, it is not always necessary to use difficult techniques or complicated software algorithms to design a freeform lens surface. This paper presents a method for designing a radially-symmetric freeform lens using a spreadsheet. The spreadsheet designs freeform lenses that transform a Lambertian (cosine[theta]) intensity profile from a light source to any output profile of the form (cosine<boolean AND>N[theta]) where N is a real number. The input and output are radially symmetric, and the lens controls the angular extent (cone half-angle) of the output beam. Several example lenses are presented and one lens is analyzed with a raytrace simulation.
引用
收藏
页数:12
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