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Proceedings Paper

Design and fabrication of optical homogenizer with micro structure by injection molding process
Author(s): C.-C. A. Chen; S.-W. Chang; C.-J. Weng
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Paper Abstract

This paper is to design and fabricate an optical homogenizer with hybrid design of collimator, toroidal lens array, and projection lens for beam shaping of Gaussian beam into uniform cylindrical beam. TracePro software was used to design the geometry of homogenizer and simulation of injection molding was preceded by Moldflow MPI to evaluate the mold design for injection molding process. The optical homogenizer is a cylindrical part with thickness 8.03 mm and diameter 5 mm. The micro structure of toroidal array has groove height designed from 12 μm to 99 μm. An electrical injection molding machine and PMMA (n= 1.4747) were selected to perform the experiment. Experimental results show that the optics homogenizer has achieved the transfer ratio of grooves (TRG) as 88.98% and also the optical uniformity as 68% with optical efficiency as 91.88%. Future study focuses on development of an optical homogenizer for LED light source.

Paper Details

Date Published: 26 August 2008
PDF: 8 pages
Proc. SPIE 7058, Eighth International Conference on Solid State Lighting, 705807 (26 August 2008); doi: 10.1117/12.804745
Show Author Affiliations
C.-C. A. Chen, National Taiwan Univ. of Science and Technology (Taiwan)
S.-W. Chang, Instrument Technology Research Ctr. (Taiwan)
C.-J. Weng, Instrument Technology Research Ctr. (Taiwan)

Published in SPIE Proceedings Vol. 7058:
Eighth International Conference on Solid State Lighting
Ian T. Ferguson; Tsunemasa Taguchi; Ian E. Ashdown; Seong-Ju Park, Editor(s)

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