Optical property measurement method and optical property calculation apparatus

An optical property calculation apparatus comprising a processor comprising hardware, the processor being configured to:

• acquire a measurement result of a first measurement apparatus configured to measure optical intensity of backscattering from a measurement target object when light is beamed to the measurement target object, and a measurement result of a second measurement apparatus configured to measure, by a different measurement method from a method used by the first measurement apparatus, optical intensity of backscattering from the measurement target object when light beamed to the measurement target object;
• calculate an attenuation coefficient in a depth direction of the measurement target object based on the measurement result of the first measurement apparatus;
• and
• calculate a scattering coefficient and an absorption coefficient in the depth direction of the measurement target object based on the measurement result of the second measurement apparatus by using a value of the calculated attenuation coefficient as a limiting condition.