PROBLEM TO BE SOLVED: To provide a method for calibrating the open-loop light intensity for a lighting system of a visual system capable of uniformizing lighting characteristics. SOLUTION: In this method, the lighting characteristics of a light source of a specific visual system are calibrated based on a defined reference relation between a reference output light intensity detected by a detecting device of a reference visual system and a reference input light intensity command value used for driving the light source. The method comprises a specific relation determining process S230 for determining a specific relation between a specific output light intensity detected by a specific detecting device and a specific input light intensity command value used for driving the light source, and function determining processes S250, S260 for determining a function for converting the specific input light intensity command value to a value, making the specific output light intensity correspond to the reference output light intensity expected to be detected if a reference light source is driven by the specific input light intensity command value, based on the reference relation and the specific relation.
METHOD AND DEVICE FOR CALIBRATING OPEN-LOOP LIGHT INTENSITY