US 12,320,518 B2
Light emitter
Noritaka Niino, Soraku-gun (JP)
Assigned to KYOCERA CORPORATION, Kyoto (JP)
Appl. No. 18/690,359
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Sep. 1, 2022, PCT No. PCT/JP2022/032966
§ 371(c)(1), (2) Date Mar. 8, 2024,
PCT Pub. No. WO2023/037958, PCT Pub. Date Mar. 16, 2023.
Claims priority of application No. 2021-146916 (JP), filed on Sep. 9, 2021.
Prior Publication US 2024/0410550 A1, Dec. 12, 2024
Int. Cl. F21V 9/32 (2018.01); F21V 8/00 (2006.01); F21Y 113/13 (2016.01); F21Y 115/30 (2016.01)
CPC F21V 9/32 (2018.02) [G02B 6/0006 (2013.01); G02B 6/001 (2013.01); F21Y 2113/13 (2016.08); F21Y 2115/30 (2016.08)] 19 Claims
OG exemplary drawing
 
1. A light emitter, comprising:
a light source unit configured to emit first excitation light and first mixed light, the first mixed light being a mixture of a plurality of component light beams with different peak wavelengths; and
a light-emitting member including an optical fiber configured to receive the first excitation light and the first mixed light,
wherein the optical fiber includes a first wavelength converter configured to emit first fluorescence in response to the first excitation light, and emits second mixed light being a mixture of the first mixed light and the first fluorescence through a side surface of the optical fiber,
the light-emitting member includes a light-emitting portion configured to emit the second mixed light outside the light-emitting member,
the plurality of component light beams includes first component light with a first peak wavelength and second component light with a second peak wavelength longer than the first peak wavelength, and
an absolute value of a difference between a first fluorescence peak wavelength of the first fluorescence and the first peak wavelength is less than an absolute value of a difference between the first fluorescence peak wavelength and the second peak wavelength.