Patent ID: 6062694
Filing Date: 2000-05-16
Classification: G02B,H04N

Abstract:
A projection type display apparatus comprising:a first optical system arranged so as to correspond to a red light component, said first optical system comprising a first polarized light separating optical system for emitting a first polarized light component based on the red light component incident thereon, a first light valve for modulating the first polarized light component emitted from said first polarized light separating optical system, and a first analyzing optical system for analyzing the first polarized light component modulated by said first light valve;a second optical system arranged so as to correspond to a green light component, said second optical system comprising a second polarized light separating optical system for emitting a second polarized light component based on the green light component incident thereon, a second light valve for modulating the second polarized light component emitted from said second polarized light separating optical system, and a second analyzing optical system for analyzing the second polarized light component modulated by said second light valve; anda third optical system arranged so as to correspond to a blue light component, said third optical system comprising a third polarized light separating optical system for emitting a third polarized light component based on the blue light component incident thereon, a third light valve for modulating the third polarized light component emitted from said third polarized light separating optical system, and a third analyzing optical system for analyzing the third polarized light component modulated by said third light valve;wherein each of said first to third polarized light analyzing separating optical systems includes a respective optical member made of an optically transparent material in which a wavelength where an absolute value of a photoelastic constant becomes a minimum value within a wavelength range of at least one of the blue light component and the green light component.