| http://www.w3.org/ns/prov#value | - However, when the laser light source is put into an ON status, the wavelength conversion elements, which are used in the deep ultraviolet light generating portion, or optical elements such as a lenses are damaged, so there is a problem in that maintaining an output status until the time when output light is not used is linked to shortening of the lifespan of the laser light source.
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