Apparatus for irradiating substances curable by radiation
First Claim
1. 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.
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Accused Products
Abstract
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.
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Citations
16 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for irradiating substances curable by radiation of a spectral range selected from the UVA and near-UVA visible wave length ranges, comprising:
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(a) a lamp for emitting a radiation including said selected 5 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; (c) an optical wave guide having an input end at said focus for guiding said reflected radiation to said substances; means for supplying power to said lamp; and monitor means for periodically interrupting said power supply means when the power consumption of said lamp decreases; wherein said power supply means operates in a constant-current mode, said monitor means including means for comparing the voltage of said lamp with a threshold value, clock pulse generating means actuated by an output signal of said comparing means, and switching means provided in said power supply means and controlled by said clock pulses. - View Dependent Claims (13)
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14. 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 said radiation; -
(b) means for supplying power to said lamp; and (c) monitor means for periodically interrupting said power means when the power consumption of said lamp decreases.
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15. An apparatus for irradiating substances curable by radiation of a spectral range selected from the UVA and near-UVA visible wave length ranges, comprising:
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(a) a lamp for emitting said radiation; (b) means for supplying power to said lamp; and (c) monitor means for periodically interrupting said power means when the power consumption of said lamp decreases; wherein said power supply means operates in a constant-current mode, said monitor means including means for comparing the voltage of said lamp with a threshold value, clock pulse generating means actuated by an output signal of said comparing means, and switching means provided in said power supply means and controlled by said clock pulses. - View Dependent Claims (16)
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Specification