Abstract: An optical inner-surface measurement device includes: an optical fiber included inside a tube, the optical fiber being configured to be inserted into a hole of an inspection object; at least two optical-path converting elements disposed in a forward-end of the optical fiber; and a motor for rotationally driving at least one of the at least two optical-path converting elements. The at least two optical-path converting elements emit a light beam, guided thereto through the optical fiber, to an inner peripheral surface of the hole of the inspection object three-dimensionally in a circumferential direction and an axial direction of the hole.

Abstract: An optical inner-surface measurement device includes: an optical fiber included inside a tube, the optical fiber being configured to be inserted into a hole of an inspection object; at least two optical-path converting elements disposed in a forward-end of the optical fiber; and a motor for rotationally driving at least one of the at least two optical-path converting elements. The at least two optical-path converting elements emit a light beam, guided thereto through the optical fiber, to an inner peripheral surface of the hole of the inspection object three-dimensionally in a circumferential direction and an axial direction of the hole.

Abstract: Higher-precision measurement is achieved by an optical inner surface measuring device configured to cause a probe to enter into the inner peripheral surface or deep hole of a target object, capture and observe reflection light from the inner surface in a three-dimensional manner, and measure the accuracy of the target object. In a structure including an optical fiber built into a tube, a light path conversion unit arranged at a leading end side of the optical fiber, and a motor configured to rotationally drive the light path conversion unit, a unit for measuring the amount of runout of a rotation shaft unit of the motor is provided. Shape data on the inner peripheral surface of a target object is obtained by calculating at a computer reflection light from the target object, and is modified by displacement amount data from a displacement measurement unit to realize high-precision measurement with no measurement error resulting from runout and rotational vibration of the rotation shaft of the motor.

Abstract: Higher-precision measurement is achieved by an optical inner surface measuring device configured to cause a probe to enter into the inner peripheral surface or deep hole of a target object, capture and observe reflection light from the inner surface in a three-dimensional manner, and measure the accuracy of the target object. In a structure including an optical fiber built into a tube, a light path conversion unit arranged at a leading end side of the optical fiber, and a motor configured to rotationally drive the light path conversion unit, a unit for measuring the amount of runout of a rotation shaft unit of the motor is provided. Shape data on the inner peripheral surface of a target object is obtained by calculating at a computer reflection light from the target object, and is modified by displacement amount data from a displacement measurement unit to realize high-precision measurement with no measurement error resulting from runout and rotational vibration of the rotation shaft of the motor.