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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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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.
©(2006) Society of Photo-Optical Instrumentation Engineers (SPIE)
Hsi-Chao Chen, Cheng-Chung Lee, and 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). https://doi.org/10.1117/1.2393154
Published: 1 November 2006
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