| abstract |
An endoscope device according to the present invention aims to obtain tissue information of a desired depth near the tissue surface of the living body tissue, wherein a light source device ( 4 ) is configured of a xenon lamp ( 11 ) for emitting illumination light, a heat ray cut filter ( 12 ) for shielding heat rays from the white light, a diaphragm device ( 13 ) for controlling the light quantity of the white light through the heat ray cut filter ( 12 ), a rotating filter ( 14 ) comprising a first filter set for outputting frame sequence light having overlapping spectral properties suitable for color reproduction situated on the outer sector and a second filter set for outputting narrow-band frame sequence light having discrete spectral properties enabling extraction of desired deep tissue information situated on the inner sector, for turning the illumination light into frame sequence light, a condenser lens ( 16 ) for collecting the frame sequence light coming through the rotating filter ( 14 ) onto the incident face of a light guide ( 15 ) disposed within the electronic endoscope ( 3 ), and a control circuit ( 17 ) for controlling the rotation of the rotating filter ( 14 ). |