Image pickup systems 1 being irradiated by observation object ones 90 to lay scattered closely due to the illumination optical system 20 which irradiates the illumination light which is emitted from the illumination illuminant 10 which emits the illumination light which possesses infrared wave length and illumination illuminant 10 to observation object ones 90 and illumination optical system 20, the image pickup optical system 30 which leads the illumination light which it is reflected or is refracted, or as object light and, to possess image pickup sensitivity closely in the infrared wave length band, the object light which arrives by image pickup optical system 30 being led absorbing light, to have with the image pickup section 40 which observation object ones 90 image pickup is done, image pickup section 40After transmitting the water and the hemoglobin, object light it absorbs light.撮像システム1は、近赤外の波長を有する照明光を放射する照明光源部10と、照明光源部10から放射された照明光を観察対象物90に照射する照明光学系20と、照明光学系20により観察対象物90に照射されて散乱,反射または屈折された照明光を物体光として導く撮像光学系30と、近赤外の波長帯に撮像感度を有し、撮像光学系30により導かれて到達した物体光を受光して観察対象物90を撮像する撮像部40とを備え、撮像部40が水およびヘモグロビンを透過した後の物体光を受光する。
