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Proceedings Article

Design and fabrication of optical homogenizer with micro structure by injection molding process

[+] Author Affiliations
C.-C. A. Chen

National Taiwan Univ. of Science and Technology (Taiwan)

S.-W. Chang, C.-J. Weng

Instrument Technology Research Ctr. (Taiwan)

Proc. SPIE 7058, Eighth International Conference on Solid State Lighting, 705807 (August 26, 2008); doi:10.1117/12.804745
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From Conference Volume 7058

  • Eighth International Conference on Solid State Lighting
  • Ian T. Ferguson; Tsunemasa Taguchi; Ian E. Ashdown; Seong-Ju Park
  • San Diego, California, USA | August 10, 2008

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.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

C.-C. A. Chen ; S.-W. Chang and C.-J. Weng
"Design and fabrication of optical homogenizer with micro structure by injection molding process", Proc. SPIE 7058, Eighth International Conference on Solid State Lighting, 705807 (August 26, 2008); doi:10.1117/12.804745; http://dx.doi.org/10.1117/12.804745


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