| 摘要 |
An endoscope light source unit including a light source lamp and an infrared-cut filter for cutting out light rays with wavelengths of a near-infrared region which are included in illumination light emitted from the light source lamp, the endoscope light source unit includes a transparent conductive coating formed on at least one of front and rear surfaces of the infrared-cut filter; at least one pair of electrode portions provided on the one of the front and rear surfaces of the infrared-cut filter in a vicinity of a rim thereof on opposite sides of the transparent conductive coating, respectively, to be electrically connected to the transparent conductive coating; and an electrical-characteristic detector which measures an electrical characteristic of the pair of electrode portions to detect whether the electrical characteristic exceeds a predetermined threshold value.
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