Patent ID: 8344652

Claim:
An optical measuring apparatus comprising: a measuring apparatus body; a lighting unit demountably mounted on the measuring apparatus and having a light-emitting diode as a light source; and a lighting controller configured to control the lighting unit according to a light intensity command value, wherein the lighting unit includes a storage unit in which calibration values for causing the light-emitting diode to generate light intensity corresponding to the light intensity command value are stored, wherein the lighting unit is releasably connected to the lighting controller, and the lighting controller receives the light intensity command value and reads out a calibration value corresponding to the light intensity command value from the calibration values stored in the storage unit, controls the light-emitting diode based upon the calibration value, and causes the light-emitting diode to generate light intensity corresponding to the light intensity command value, wherein the lighting unit includes a cable, a light-emitting unit being provided at an end of the cable and having the light-emitting diode, and a connecting unit being provided at the other end of the cable and being connected to the lighting controller, and the storage unit is provided in the connecting unit, wherein the light-emitting unit includes a heat-discharging fan, and operation of the heat-discharging fan is controlled by the lighting controller when the connecting unit is connected to the lighting controller.