Patent ID: 8942523
Filing Date: 2015-01-27
Classification: A61B,G01N,G02B

Abstract:
1. A probe having an optical system which illuminates an illumination light to a site of measurement of a biological tissue and receives a radiative light radiated from the site of measurement, and configured so as to measure the radiative light, the probe comprising: a first optical fiber which configures an illumination light guide through which the illumination light is guided and a second optical fiber which configures a receiving light guide through which the radiative light is acquired, the first optical fiber and the second optical fiber being independent from each other; a condensing lens which receives the illumination light output from the first optical fiber and outputs the received illumination light towards the site of measurement and which receives the radiative light radiated from the site of measurement and condenses the received radiative light towards the second optical fiber, wherein the first optical fiber is aligned so as to shift a center axis of an output end of the first optical fiber away from an optical axis of the condensing lens or/and relatively inclined from the optical axis of the condensing lens, and when compared with a configuration without shift and inclination, a reflected light from a surface of the condensing lens is brought away from a center axis of an input end of the second optical fiber and the radiative light condensed by the condensing lens is brought closer to the center axis of the input end of the second optical fiber, and wherein, in a plane normal to the optical axis of the condensing lens, a center of distribution of the reflected light from the condensing lens is positioned opposite to the center axis of the output end of the first optical fiber while placing the optical axis of the condensing lens in between, and the center of condensation of the radiative light is positioned closer to the center of the output end of the first optical fiber than to the optical axis of the condensing lens.