| 摘要 |
<P>PROBLEM TO BE SOLVED: To position a chromaticity coordinate plot of a mixed color light of a white light, from a white light source with a red light from a red light source on a black body radiation locus, and also when using the generally available, a general-purpose and low-cost white light source. <P>SOLUTION: A light source device includes the white light source 10, that radiates the white light positioned on the black body radiation locus; the red light source 20 radiating the red light to be mixed with the white light from the white light source 10; and a filter 30 for cutting of blue components, from the light from the white light source 10 at a predetermined rate, wherein the filter 30 has a transmittance of 20-60% in a wavelength range of 480 nm or less and a transmittance of 90% or higher, in a wavelength range of 500 nm or longer. <P>COPYRIGHT: (C)2011,JPO&INPIT |
