CPC G01N 21/255 (2013.01) [G01N 21/314 (2013.01); G01N 21/6428 (2013.01); H01L 25/0753 (2013.01); G01N 2021/3181 (2013.01); G01N 2201/062 (2013.01); H01L 33/502 (2013.01)] | 10 Claims |
1. A broadband light source device, comprising:
a first LED chip that generates a light beam having a first wavelength band;
a fluorescent substance that is provided in the light beam of the first LED chip; and
a second LED chip that generates a light beam having a second wavelength band, wherein
the fluorescent substance includes at least alumina and at least one of Fe, Cr, Bi, Tl, Ce, Tb, Eu, and Mn and is produced by calcining a raw material that contains sodium at 6.1 to 15.9 wt. % in the whole raw material, and the light beam from the fluorescent substance and the light beam from the second LED chip are color-mixed,
a center of the first wavelength band is 370 to 390 nm, and
a center of the second wavelength band is 340 nm.
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