公开(公告)号：US20230204842A1

公开(公告)日：2023-06-29

申请号：US18060640

申请日：2022-12-01

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Keisuke TAKE ,  Hideaki HASEGAWA ,  Shun-ichi MATSUSHITA

IPC: F21V8/00

CPC classification number: G02B6/0008 ,  A61N5/067

Abstract: Provided is a light diffusion device capable of irradiating laser light onto a plurality of locations in a human body in a state in which a distal end portion of an optical transmission cable is placed in the human body. The light diffusion device includes an optical transmission cable including a plurality of cores, and a light refracting portion configured to refract the light emitted from each of the plurality of cores so that irradiation directions thereof are different from each other. With such a configuration, it is possible to irradiate the laser light in a plurality of directions when the distal end of the optical transmission cable is placed in the human body. Therefore, it is possible to change the location where the laser light is irradiated without extracting or re-inserting the optical transmission cable from or into the human body, thereby shortening the time required for photoimmunotherapy.

公开(公告)号：US20250020860A1

公开(公告)日：2025-01-16

申请号：US18713707

申请日：2022-11-24

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Hideaki HASEGAWA ,  Keisuke TAKE ,  Masaki IWAMA ,  Shun-ichi MATSUSHITA

IPC: G02B6/02 ,  A61N5/06 ,  A61N5/067 ,  F21V8/00

Abstract: Provided is a light diffusion device capable of uniformly emitting light from the outer circumferential surface of a light-emitting part of an optical fiber. This light diffusion device 1 comprises an optical fiber 20 composed of a core 21 positioned on the radial center side and a clad 22 positioned on the outer circumferential side of the core 21, and emits laser light, which is incident from a proximal end section of the optical fiber 20, from the distal end side of the optical fiber 20, wherein: the optical fiber 20 has a light transmission part 20a which transmits the laser light incident from the proximal end section toward the distal end section, and a light-emitting part 20b which emits, from the outer circumferential surface, the laser light transmitted from the light transmission part 20a by removing a portion positioned on the outer circumferential side of the clad 22 on the distal end side; and the maximum thickness of the clad 22 in the light-emitting part 20b is smaller than the thickness of the clad 22 in the light transmission part 20a.