Abstract: Provided is an optical measurement device configured so that a high-accuracy three-dimensional image can be obtained. An emission angle of a ray of light is changed in such a manner that the rotation frequencies of two motors configured to rotatably drive a first optical path changing unit and a second optical path changing unit is controlled. The ray of light is emitted to a front three-dimensional region, and reflected light is obtained. Then, calculation is made by a computer, and in this manner, three-dimensional data on a measurement target object is obtained. The amount (vibration amount) of axial backlash or play of a rotary mechanism, such as a motor shaft, along which the ray of light is emitted is measured in real time, and such a backlash or play amount is subtracted from a three-dimensional image obtained by the computer. Consequently, a high-accuracy three-dimensional image is obtained.

Abstract: An optical inner surface measurement device is provided; which includes a motor; a rotary optical fiber configured to be rotated by the motor; a fixed optical fiber configured not to rotate relative to the rotary optical fiber; and a runout detection sensor configured to measure a runout amount of the rotary optical fiber, wherein an optical path conversion device is arranged at a tip end of the rotary optical fiber, at a back of the motor, both end surfaces of the rotary optical fiber and the fixed optical fiber face each other with a minute clearance, and reflected light, which is captured by the optical path conversion device, from a measurement target object inner surface is guided to a measurement machine body by way of the rotary optical fiber and the fixed optical fiber and is analyzed by a computer to produce inner surface measurement data, and the inner surface measurement data is corrected based on the runout amount detected by the runout detection sensor.

Abstract: An optical inner surface measurement device is provided; which includes a motor; a rotary optical fiber configured to be rotated by the motor; a fixed optical fiber configured not to rotate relative to the rotary optical fiber; and a runout detection sensor configured to measure a runout amount of the rotary optical fiber, wherein an optical path conversion device is arranged at a tip end of the rotary optical fiber, at a back of the motor, both end surfaces of the rotary optical fiber and the fixed optical fiber face each other with a minute clearance, and reflected light, which is captured by the optical path conversion device, from a measurement target object inner surface is guided to a measurement machine body by way of the rotary optical fiber and the fixed optical fiber and is analyzed by a computer to produce inner surface measurement data, and the inner surface measurement data is corrected based on the runout amount detected by the runout detection sensor.

Abstract: Provided is an optical measurement device configured so that a high-accuracy three-dimensional image can be obtained. An emission angle of a ray of light is changed in such a manner that the rotation frequencies of two motors configured to rotatably drive a first optical path changing unit and a second optical path changing unit is controlled. The ray of light is emitted to a front three-dimensional region, and reflected light is obtained. Then, calculation is made by a computer, and in this manner, three-dimensional data on a measurement target object is obtained. The amount (vibration amount) of axial backlash or play of a rotary mechanism, such as a motor shaft, along which the ray of light is emitted is measured in real time, and such a backlash or play amount is subtracted from a three-dimensional image obtained by the computer. Consequently, a high-accuracy three-dimensional image is obtained.