Operation of halogen lamp for curing of material
US6442339B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2001 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | May 4, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C19/003
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for curing dental material with radiation from a halogen lamp provides for a shifting of a spectrum of the radiation to a shorter wavelength for increased rate of curing by adjusting current flow within a heating element of the lamp. The current is applied over an interval of time for accomplishing the curing. Feedback and feedforward circuitry, operative with a control signal of a regulated power source to reduce voltage applied by the power source to the heating element during an initial portion of the interval of time, prior to obtaining an operating temperature of the heating element, to maintain an upper bound on the magnitude of the current applied to the heating element, thereby to the vivid unnecessary and operations of the heating element for increased operating lifetime of the lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.