초록 ▼

An apparatus for irradiating substances curable by radiation comprises a lamp the emitted radiation of which includes both the UVA or near-UVA spectral range required for the curing and spectral ranges outside these useful ranges. A glass substrate surrounding the lamp has an ellipsoidal concave sur

An apparatus for irradiating substances curable by radiation comprises a lamp the emitted radiation of which includes both the UVA or near-UVA spectral range required for the curing and spectral ranges outside these useful ranges. A glass substrate surrounding the lamp has an ellipsoidal concave surface carrying a thin-film filter which reflects only the useful radiation but transmits the undesired spectral ranges, particularly the major portion of the visible light and the thermal radiation. When the power consumption of the lamp decreases as a result of clustering of the filament, the power supply is periodically interrupted thereby producing a flashing signal to warn the user.

대표청구항 ▼

An apparatus for irradiating substances curable by radiation of a spectral range selected from the UVA and near-UVA visible wave length ranges, comprising (a) a lamp for emitting a radiation including said selected spectral range; (b) a selective reflector which reflects radiation of said selected s

An apparatus for irradiating substances curable by radiation of a spectral range selected from the UVA and near-UVA visible wave length ranges, comprising (a) a lamp for emitting a radiation including said selected spectral range; (b) a selective reflector which reflects radiation of said selected spectral range and transmits radiation outside thereof, the reflector partially surrounding said lamp so as to converge the reflected radiation to a focus located outside said lamp at the side remote from said reflector; and (c) an optical wave guide having an input end at said focus for guiding said reflected radiation to said substances.