Patent ID: 11933489
Assignee: STANLEY ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  G  H | IPC F  H

Claim 0:
1. An optical device, comprising:
a metal reflective layer made of a metal material;
a first light transmissive layer disposed on the metal reflective layer, wherein the first light transmissive layer has a thickness of at least 1.5 μm;
an optical multilayer reflective film disposed on the first light transmissive layer and comprising a plurality of sublayers stacked on each other and having different refractive indexes, wherein the optical multilayer reflective film is formed in contact with the first light transmissive layer; and
a wavelength converting layer disposed on the optical multilayer reflective film and including a fluorescent material capable of absorbing incident excitation light and generating fluorescent light having a lower energy, the wavelength converting layer being capable of generating mixed light including the excitation light and the fluorescent light in response to irradiation with the excitation light,
wherein the optical device is configured such that part of the fluorescent light generated by the fluorescent material included in the wavelength converting layer is incident to the optical multilayer reflective film, the first light transmissive layer, and the metal reflective layer and is reflected by the optical multilayer reflective film and the metal reflective layer, thereby being emitted through a surface of the wavelength converting layer to outside.