endoscope system is irradiated to the subject through the optical system for irradiating the optical system and the light guiding member for guiding the illumination light emitted from the light source, the illumination light guided by the light guide member to the subject an endoscope irradiation position of the illumination light is provided with a drive unit for swinging the guide member so that the irradiation position along the predetermined scan pattern, the illumination light irradiated along a predetermined scanning pattern coordinate information obtaining unit for obtaining identifiable coordinate information the irradiation position of, by performing processing based on the coordinate information, a reference light in a predetermined wavelength band included in the illumination light, having a predetermined included in the illumination light a correction information acquisition unit for acquiring correction information for correcting the lateral chromatic aberration of light having other wavelength band other than the wavelength band, the.内視鏡システムは、光源から発せられた照明光を導く導光部材と、導光部材により導かれた照明光を被写体へ照射する光学系と、光学系を経て被写体へ照射される照明光の照射位置が所定の走査パターンに沿った照射位置となるように導光部材を揺動させる駆動部と、を備えた内視鏡と、所定の走査パターンに沿って照射される照明光の照射位置を特定可能な座標情報を取得する座標情報取得部と、座標情報に基づく処理を行うことにより、照明光に含まれる所定の波長帯域の光を基準として、照明光に含まれる所定の波長帯域以外の他の波長帯域の光の倍率色収差を補正するための補正情報を取得する補正情報取得部と、を有する。
