1 November 2006 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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Optical Engineering, 45(11), 113801 (2006). doi:10.1117/1.2393154
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.
Hsi-Chao Chen, Cheng-Chung Lee, June-Jei Huang, "Improving the illumination efficiency and color temperature for a projection system by depositing thin-film coatings on an x-cube prism," Optical Engineering 45(11), 113801 (1 November 2006). http://dx.doi.org/10.1117/1.2393154
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KEYWORDS
Prisms

Projection systems

Mirrors

Optical filters

Thin film coatings

Digital Light Processing

Thin films

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