US 11,874,455 B2
Light irradiation device and light irradiation system
Yuko Katsurada, Seto (JP); and Toshihiko Tsukamoto, Seto (JP)
Assigned to ASAHI INTECC CO., LTD., Seto (JP)
Filed by ASAHI INTECC CO., LTD., Seto (JP)
Filed on Apr. 6, 2022, as Appl. No. 17/714,637.
Application 17/714,637 is a continuation of application No. PCT/JP2020/030964, filed on Aug. 17, 2020.
Claims priority of application No. 2019-190447 (JP), filed on Oct. 17, 2019.
Prior Publication US 2022/0229282 A1, Jul. 21, 2022
Int. Cl. F21V 8/00 (2006.01); G02B 23/24 (2006.01); A61N 5/06 (2006.01)
CPC G02B 23/2469 (2013.01) [G02B 6/0008 (2013.01); A61N 5/0601 (2013.01); A61N 5/062 (2013.01); A61N 2005/063 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A light irradiation device having an elongated outer shape, the light irradiation device comprising:
an optical fiber configured to emit a light from a distal end of the optical fiber and including a curved part, the curved part orienting the distal end in a direction intersecting with a longitudinal direction of the light irradiation device; and
a light transmitting holder holding the curved part so as to maintain a shape of the curved part, wherein
the optical fiber includes a core and an outer surface layer, and
the holder has a refractive index lower than a refractive index of the outer surface layer of the optical fiber.