Patent ID: 8803070

Claim:
A biological optical measurement instrument comprising: a light source unit including an incident optical fiber that irradiates a near-infrared light; an optical measurement unit including a detection optical fiber that measures the passing light at a plurality of measurement points in an object to be examined; a signal processing unit configured to process the measurement data outputted from the optical measurement unit and thereby generating an image; and a display unit configured to display the measurement data, characterized in further comprising: a gain adjustment unit configured to set a gain value on the measurement data detected by the optical measurement unit based on the light intensity of the passing light; a gain storage unit configured to store a damage gain value set by the gain adjustment unit when a damaged incident optical unit or a damaged detection optical fiber is used; a gain comparison unit configured to compare the gain value set by the gain adjustment unit and the damage gain value stored in the gain storage unit; and a damage determination unit configured to determine whether the incident optical fiber or the detection optical fiber is damaged or not based on the comparison result by the gain comparison unit, wherein the display unit displays the damage condition.