Abstract: In a flash emitting device, a flash from the plurality of flash discharge lamps is emitted on a work piece. The flash emitting device has a plurality of flash discharge lamps arranged in parallel including side flash discharge lamps located on sides of the flash emitting device and center flash discharge lamps located at the center portion of the flash emitting device, side main condensers, each of which is connected to one of the side flash discharge lamps, and center main condensers, each of which is connected to one of the center flash discharge lamps, wherein a voltage to which the side main condensers is charged is higher than that to which the center main condensers are charged.

Abstract: A system for bleaching discolored teeth is provided, and this system has a function irradiating light emitted from a light-emitting section to the surface of teeth applied with a chemical agent including titanium dioxide and hydrogen peroxide, a irradiation energy of wavelength 380 to 420 nm of the light emitted from the light-emitting section is at least 37 mW/cm2 and the ratio of irradiation energy of wavelength 380 to 420 nm with respect to the irradiation energy of wavelength 200 to 800 nm thereof is at least 36% at this light-emitting section, and whereby it is possible to obtain high bleaching effect of the teeth, to reduce the heat applied to the teeth to a low level (no more than 40° C.) and to reduce emission of ultraviolet light that has an adverse effect on the human body to a low level.

Abstract: In a flash emitting device, a flash from the plurality of flash discharge lamps is emitted on a work piece. The flash emitting device has a plurality of flash discharge lamps arranged in parallel including side flash discharge lamps located on sides of the flash emitting device and center flash discharge lamps located at the center portion of the flash emitting device, side main condensers, each of which is connected to one of the side flash discharge lamps, and center main condensers, each of which is connected to one of the center flash discharge lamps, wherein a voltage to which the side main condensers is charged is higher than that to which the center main condensers are charged.

Abstract: A system for bleaching discolored teeth is provided, and this system has a function irradiating light emitted from a light-emitting section to the surface of teeth applied with a chemical agent including titanium dioxide and hydrogen peroxide, a irradiation energy of wavelength 380 to 420 nm of the light emitted from the light-emitting section is at least 37 mW/cm2 and the ratio of irradiation energy of wavelength 380 to 420 nm with respect to the irradiation energy of wavelength 200 to 800 nm thereof is at least 36% at this light-emitting section, and whereby it is possible to obtain high bleaching effect of the teeth, to reduce the heat applied to the teeth to a low level (no more than 40° C.) and to reduce emission of ultraviolet light that has an adverse effect on the human body to a low level.