Photo curing light system having modulated light intensity control
AssigneeAir Techniques, Inc.
InventorsElliot R. Gemunder, Hyeok-Jae (Daniel) Chi
Life of this patent
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Abstract
A photo-curing light system in which a modulation of the light intensity or output is controlled via an analogue control voltage to the control line output of the lamp power supply. The control signal results in the lamp current being reduced from its maximum value to a lower value on a continuous and repeated basis thereby modulating the light and reducing the heating value to surrounding material such as tooth structure during the curing process.
Claims4
An apparatus for curing light sensitive, polymeric compositions with a light source, an optical light guide system, a control unit for controlling the irradiation time, an input unit for inputting of the irradiation time by the user, a display unit for displaying the irradiation time set and/or remaining, a control unit for controlling the light output delivered by the light source, a light filtering system, and a means for modulating the light intensity delivered by the light source to the polymeric composition.
A method of curing light sensitive polymeric compositions and reducing the heating affect to surrounding material utilizing a light source, an optical light guide system, a control unit for controlling the irradiation time, an input unit for inputting the irradiation time by the user, a display unit for displaying the irradiation time set and/or remaining, a control unit for controlling the light output delivered by said light source wherein said method comprises modulating said light source during the irradiation time by means of a microprocessor generating a digital signal convertible to an analogue signal by means of a digital to analogue converter integrated circuit, said analogue signal in communication with a constant current circuit having an amplifier integrated circuit and transistor, said analogue control signal reducing lamp current from its maximum value to a lower value on a continuous and repeated basis.
Dependencies are inferred from the claim text.