Abstract: At the leading end of a probe (11) is provided a holding part (56) that has a space (60) having an inner diameter smaller than the inner diameter of the probe (11). A liquid discharge groove (61) that communicates between the space (60) and the outer peripheral side surface of the holding part (56) is formed in the holding part (56).

Abstract: A probe is shown. According to one implementation, the following is included at a tip of the probe, as the optical system. A first optical fiber system forms an irradiating light guiding path to guide irradiating light. A second optical fiber system forms a receiving light guiding path to guide measuring light. A condenser lens system is positioned opposed to the first optical fiber system and the second optical fiber system, and the irradiating light is irradiated thereon and the measuring light is condensed. An optical axis of the condenser lens system, a central axis of a light emitting end of the first optical fiber system, and a central axis of a light receiving end of the second optical fiber system are positioned so a straight line which passes through two axes does not pass through a remaining axis.

Abstract: At the leading end of a probe (11) is provided a holding part (56) that has a space (60) having an inner diameter smaller than the inner diameter of the probe (11). A liquid discharge groove (61) that communicates between the space (60) and the outer peripheral side surface of the holding part (56) is formed in the holding part (56).

Abstract: Optical probe having, independently, an irradiation light guide path for irradiation light and a received light guide path for acquiring radiated light. A first optical fiber configures the irradiation light guide path, and a second optical fiber configures the received light guide path. A condensing lens receives on one surface irradiation light from the first optical fiber and emits same on the other surface, and receives radiated light radiated from the other surface and concentrates same on the side of the first and second optical fibers. The central axis of the exit end of the first optical fiber is deviated relative to the optical axis of the condensing lens, moving reflected light at the condensing lens surface away from, and moving radiated light concentrated by the condensing lens closer to, the center of the light-receiving end of the second optical fiber.

Abstract: A probe is shown. According to one implementation, the following is included at a tip of the probe, as the optical system. A first optical fiber system forms an irradiating light guiding path to guide irradiating light. A second optical fiber system forms a receiving light guiding path to guide measuring light. A condenser lens system is positioned opposed to the first optical fiber system and the second optical fiber system, and the irradiating light is irradiated thereon and the measuring light is condensed. An optical axis of the condenser lens system, a central axis of a light emitting end of the first optical fiber system, and a central axis of a light receiving end of the second optical fiber system are positioned so a straight line which passes through two axes does not pass through a remaining axis.

Abstract: Optical probe having, independently, an irradiation light guide path for irradiation light and a received light guide path for acquiring radiated light. A first optical fiber configures the irradiation light guide path, and a second optical fiber configures the received light guide path. A condensing lens receives on one surface irradiation light from the first optical fiber and emits same on the other surface, and receives radiated light radiated from the other surface and concentrates same on the side of the first and second optical fibers. The central axis of the exit end of the first optical fiber is deviated relative to the optical axis of the condensing lens, moving reflected light at the condensing lens surface away from, and moving radiated light concentrated by the condensing lens closer to, the center of the light-receiving end of the second optical fiber.