A broad spectrum light source applicable to the field of light source technologies for materials analysis is provided. A broad spectrum light source is obtained by means of the concept of combined multi-spectral imaging. Specifically, a shortpass filter (502) filters out a visible spectrum comprising a peak spectral line from light (514) in a first direction of a deuterium lamp (501) to obtain blue light and an ultraviolet spectrum. Light (515) generated in a second direction of the deuterium lamp (501) passes through a 400 nm bandpass filter (505) to generate a 400 nm partial blue light spectrum. A neutral density filter (509) reduces visible light from light (516) in a first direction of a tungsten lamp (508). A longpass filter (511) filters blue light, an ultraviolet spectrum, and a visible spectrum from light (517) generated in a second direction of the tungsten lamp (508) to obtain a near-infrared spectrum. Light obtained after filtering in the first direction and the second direction of the deuterium la
