Patent ID: 8723942

Claim:
A photomicroscopy system, comprising: a microscope unit which outputs an enlarged image of a subject as a light flux; an image capturing unit which forms an image of the light flux output by the microscope unit, and converts the formed image into digital data; a sensitivity changing unit which changes a sensitivity of the image capturing unit; and a computing unit which obtains an exposure time by using the digital data captured by the image capturing unit in a state where the sensitivity is increased to a maximum sensitivity after instructing the sensitivity changing unit to increase the sensitivity of the image capturing unit from an initial sensitivity to the maximum sensitivity while calculating the exposure time for obtaining a suitable brightness by the image capturing unit, and sets the sensitivity of the image capturing unit back to the initial sensitivity after the exposure time is set in the image capturing unit; wherein the computing unit is configured to calculate an intermediate exposure time on the basis of a ratio of brightness of the digital data, which is captured at the maximum sensitivity, to a suitable brightness until a brightness obtained on the basis of the digital data reaches the suitable brightness while calculating the exposure time, and adjust the intermediate exposure time using an exposure time correction coefficient which is determined from the maximum sensitivity and the initial sensitivity.