Patent ID: 8529067
Filing Date: 2013-09-10
Classification: G03B

Abstract:
1. An image synthesizing device for a projector apparatus, the device comprising: first, second, and third polarizing beam splitters respectively provided for red light, green light, and blue light; and a light combining unit configured to combine and output the red light, the green light, and the blue light passing through the first, second, and third polarizing beam splitters, wherein the first, second, and third polarizing beam splitters respectively include first, second, and third polarizing films, wherein the first and second polarizing films where the red light and the green light enter are each formed of an organic material, and the third polarizing film where the blue light enters is formed of an inorganic material, such that of the first, second and third polarizing films only the first and second polarizing films are formed of the organic material and of the first, second and third polarizing films only the third polarizing film is formed of the inorganic material, and wherein s-polarized light transmittances of the first and second polarizing films are lower than an s-polarized light transmittance of the third polarizing film such that with a measuring angle of any one of −12 degrees, 0 degrees, and 12 degrees each of the s-polarized light transmittances of the first and second polarizing films is 0.05 percent or less when wavelength is in a range of 420 nm to 540 nm and the s-polarized light transmittance of the third polarizing film exceeds 0.2 percent when the wavelength is in the range of 420 nm to 540 nm, in which the measuring angle has a value of 0 degrees when an incident angle of incident light relative to a normal of a respective polarizing film has a value of 45 degrees.