Apparatus for irradiating substances curable by radiation

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