US 11,754,793 B2
Excitation light irradiation device and excitation light irradiation method
Masateru Hashimoto, Ueda (JP); and Yoshiharu Yoshii, Natori (JP)
Assigned to SUMIDA CORPORATION
Filed by SUMIDA CORPORATION, Tokyo (JP)
Filed on Apr. 1, 2022, as Appl. No. 17/711,111.
Application 17/711,111 is a continuation of application No. 17/223,177, filed on Apr. 6, 2021, granted, now 11,320,607.
Application 17/223,177 is a continuation of application No. 16/671,730, filed on Nov. 1, 2019, granted, now 10,996,407, issued on May 4, 2021.
Claims priority of application No. 2018-244101 (JP), filed on Dec. 27, 2018.
Prior Publication US 2022/0229246 A1, Jul. 21, 2022
Int. Cl. G02B 6/42 (2006.01); G01R 33/26 (2006.01)
CPC G02B 6/4201 (2013.01) [G01R 33/26 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An excitation light irradiation device comprising:
a substrate having a color center, the color center being configured to be excited by an excitation light incident to the substrate, the substrate including:
first and second reflection surfaces reflecting the excitation light;
first and second end surfaces facing each other; and
an incident auxiliary member having an incident surface and an emission surface which is joined to the first reflection surface,
wherein, the excitation light enters into the incident surface of the incident auxiliary member, passes through the incident auxiliary member, and emits from the emission surface of the incident auxiliary member into the first reflection surface of the substrate,
the excitation light, which has entered into the first reflection surface of the substrate, travels from a first area near the first end surface to a second area near the second end surface while repeatedly reflecting between the first and second reflection surfaces, and
the incident surface of the incident auxiliary member and the first end surface are coplanar.