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Optical Engineering

Improving the illumination efficiency and color temperature for a projection system by depositing thin-film coatings on an x-cube prism
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Paper Abstract

A new x-cube prism with small polarizing dichroic filters was made for an optical projection system. The x-cube prism was used to combine the three primary colors, which were divided by the preset dichroic mirrors. A coating was designed and fabricated such that s- and p-polarized light was shifted to be obliquely incident in the x-cube prism: the shift was the same as that at the dividing dichroic mirrors. Hence, energy loss was lower than that associated with the conventional x-cube prism, and the brightness of the projection system was 33.2% higher and the color temperature was 18.2% higher than those of the conventional x-cube prism.

Paper Details

Date Published: 1 November 2006
PDF: 5 pages
Opt. Eng. 45(11) 113801 doi: 10.1117/1.2393154
Published in: Optical Engineering Volume 45, Issue 11
Show Author Affiliations
Hsi-Chao Chen, De Lin Institute of Technology (Taiwan)
Cheng-Chung Lee, National Central Univ. (Taiwan)
June-Jei Huang, Delta Electronics, Inc. (Taiwan)


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