The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 2026
Filed:
May. 27, 2021
Hamamatsu Photonics K.k., Hamamatsu, JP;
Yoshitaka Kurosaka, Hamamatsu, JP;
Kazuyoshi Hirose, Hamamatsu, JP;
Yuu Takiguchi, Hamamatsu, JP;
Akio Ito, Hamamatsu, JP;
Tadataka Edamura, Hamamatsu, JP;
Takahiko Yamanaka, Hamamatsu, JP;
Shigeo Hara, Hamamatsu, JP;
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Abstract
An optical device of one embodiment outputs light in a short-wavelength range such as a visible range. The optical device includes a UC layer, first and second light-confinement layers, and a resonance mode forming layer. The UC layer contains an upconversion material receiving excitation light in a first wavelength range and outputting light in a second wavelength range. The first light-confinement layer has a characteristic of reflecting part of the second wavelength-range light. The second light-confinement layer has a characteristic of reflecting part of the second wavelength-range light and transmitting the remainder, and is disposed such that the UC layer locates between the first and second light-confinement layers. The resonance mode forming layer locates between the UC layer and the first or second light-confinement layer, includes a base layer and plural modified refractive index regions, and forms a resonance mode of the second wavelength-range light.