Patent ID: 11906893
Assignee: SONY GROUP CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  F | IPC G

Claim 0:
1. An optical system, comprising:
a fluorescent unit including a phosphor region excited by a first color light beam to output fluorescent light including at least one color light beam, the fluorescent unit outputting the first color light beam in a first period and outputting the fluorescent light in a second period;
one or two light valves illuminated by at least one of the first color light beam or the fluorescent light;
a region division element including a first region and a second region and being disposed on an optical path between the fluorescent unit and the one or two light valves, the first region having a property of outputting the first color light beam and the fluorescent light from the fluorescent unit to be able to reach the one or two light valves, the second region having a property of outputting the fluorescent light from the fluorescent unit to be able to reach the one or two light valves, wherein the region division element comprises a wavelength selective filter having mutually different wavelength selective properties between the first region and the second region; and
a polarizing dichroic plate disposed on the optical path between the fluorescent unit and the one or two light valves, the polarizing dichroic plate reflecting the first color light beam toward the fluorescent unit and transmitting the first color light beam and the fluorescent light reflected by the fluorescent unit, wherein
the wavelength selective filter is disposed on an optical path between the fluorescent unit and the polarizing dichroic plate.