<；P>；PROBLEM TO BE SOLVED: To prevent a user from feeling the flickering of illumination light in an imaging device receiving the reflected light from a part to be observed irradiated with the illumination light emitted from a light source part to take the image of the part to be observed. <；P>；SOLUTION: The rotary shutter, which is arranged on and attached to the light path of the illumination light emitted from the light source in a rotatable manner and equipped with a part permitting the illumination light to pass and a part shading the illumination light, and a drive control part for rotationally driving the rotary shutter are provided to a light source part 20 and constituted so that the non-irradiation period NR of the illumination light may become 8.33 ms or below. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
