| 摘要 |
PURPOSE:To make it possible to directly measure absorbing characteristics, by providing a vetreous transparent body uniformly dispersing emitting light and incident light at the leading end of the optical fiber inserted in a blood vessel to measure the light absorbing characteristic of blood and forming the leading end part of said transparent body into a prism shape having a minute gap for permitting the penetration of blood. CONSTITUTION:The side surface of an optical fiber 1 constituting an optical sensor is surrounded by a stainless steel sleeve 6 and the leading end of the opening of the sleeve 6 is filled with the vitreous transparent body 2 contacted with the end surface of the fiber 1. This transparent body 2 has action for uniformly diffusing the light projected to the fiber 1 with in the cross-section of said fiber 1. Further, the leading end part of the transparent body 2 is formed into a prism 3 having a minute gap 4 for permitting the penetration of blood 5 and light is allowed to be projected to said gap 4 and reflected. By this method, even when blood is thick and light scattering absorption is too large, the blood absorbing characteristic of a living body can be directly measured without diluting blood. |
