Medical optical sensor and force sensing method

The invention discloses a medical optical sensor and a force sensing method.The medical optical sensor comprises a first elastic body and a second elastic body which are connected, the first elastic body is provided with a first sensing optical fiber for detecting the strain of the first elastic body, and the second elastic body is provided with a second sensing optical fiber for detecting the strain of the second elastic body; and when the first elastic body and the second elastic body are subjected to the same target force, the generated strain is different. Through the arrangement, the same target force is measured through the two sections of sensing optical fibers, and because the strain measured by the two sections of sensing optical fibers has a difference value, the accurate value of the target force is obtained through the related calculation formula of each section of elastic body and optical fiber. In the calculation process, two groups of numerical values are used for calculation, so that external