Patent ID: 8562514

Claim:
An endoscopic system including an endoscope configured to be inserted into a body cavity, the endoscopic system comprising: a light source device configured to emit an illumination light; a light guide fiber which is arranged to the endoscope, and which is configured to receive the illumination light; a connector arranged at a proximal end portion of the light guide fiber; a receiving connector which is detachably coupled with the connector, and which is configured to bring the illumination light, emitted from the light source device, to the light guide fiber; a memory which is arranged in the endoscope, and which is configured to store information of indicating whether or not the endoscope has been inserted into a body cavity; a use state determination unit configured to read out the information, and configured to determine a use state as a used state in which the endoscope has been inserted into the body cavity or as an unused state in which the endoscope has not been inserted into the body cavity, in accordance with the information when the connector is connected with the receiving connector; a switch driving unit configured to cause the light source device to emit the illumination light into the light guide fiber only when the use state determination unit determines the use state as the unused state; a light controller configured to adjust a light quantity of the illumination light emitted from the light source device; an imaging element which is arranged to the endoscope, and which is configured to obtain pictures; and a luminance measurement apparatus configured to measure luminance of the pictures obtained by the imaging element, wherein the use state determination unit is configured to determine the use state stored in the memory in accordance with a light control state of the light controller, the use state determination unit is configured to determine the use state as the used state only when the light controller has controlled the light quantity of the illumination light, the light controller is configured to control the light quantity of the illumination light when the luminance measurement apparatus detects a state in which the endoscope has been put in a dark position, in accordance with the luminance measured by the luminance measurement apparatus, and the use state stored in the memory is configured to be changed to the used state when the light controller controls the light quantity of the illumination light.