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

Claim 6:
7. 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; and
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 has a property of a wavelength selective diffraction grating that, in the second region, diffracts the first color light beam from the fluorescent unit not to reach the one or two light valves, and diffracts the fluorescent light from the fluorescent unit to be able to reach the one or two light valves.