FIBER OPTIC SENSOR, AND MICRO-DISPLACEMENT MEASURING APPARATUS AND BIOLOGICAL INFORMATION MEASURING APPARATUS USING THE SAME

摘要

PPROBLEM TO BE SOLVED: To provide a fiber optic sensor that is minaturized, superior in durability, and can measure micro-displacement with high precision, and to provide a micro-displacement measuring apparatus and a biological information measuring apparatus using the sensor. PSOLUTION: The pulse pressure measuring sensor includes an optical fiber 3 having a hetero-core unit in a sensor unit SP, a supporting member 11 which is formed with an opening S and supports the optical fiber 3 so that the sensor unit SP is positioned within the area of the opening S, and a contact member 12 which is in contact with the sensor unit SP on the side opposite to the opening S. When the contact member 12 is displaced, bending being convex toward the opening S occurs in the vicinity of the sensor unit SP of the optical fiber 3, causing light transmitted through the optical fiber 3 to generate loss on the basis of the displacement of the contact member 12. PCOPYRIGHT: (C)2010,JPO&INPIT