The problem of generating a uniform irradiance distribution on a target plane using extended sources has been addressed by several authors in recent arti1 The techniques described in these papers are generally applicable to any source to target distance. However, most effort has been put into uniform irradiance on a distant target ( one whose distance is large compared to the size ofthe illumination source and its uminair'24 ' The techniques ofnon imaging optics have generally been applied to design these luniinaires. The tailored edge-my method is used to adjust the irradiance on target while maintaining collection efficiency at or near the theoretical limit. The present effort was stimulated by the desire to heat a substrate with a high degree of uniformity. The sources are tungsten-halogen filament lamps and the luminaires surround them. The luininaires in this work were consirained to fit into existing hardware and replace existing conventional luininaires. Section 2 lays out the theory ofluminaire design and the methods used to generate the luminaire shape. Section 3 provides the method of tracing rays through the luininaire to test the uniformity of irradiance. Section 4 provides the results of the effort to get uniform irradiance and Section 5 summarizes these results and draws some conclusions.

Date Published: 3 October 1997
PDF: 12 pages
Proc. SPIE 3139, Nonimaging Optics: Maximum Efficiency Light Transfer IV, (3 October 1997); doi: 10.1117/12.290215

Published in SPIE Proceedings Vol. 3139:
Nonimaging Optics: Maximum Efficiency Light Transfer IV
Roland Winston, Editor(s)