| 摘要 |
A light source which may be used as part of a dental curing lamp is comprise d of at least one, and preferably a plurality, of LEDs. To increase the efficiency of the light output the LEDs are encapsulated in a beam converger including an extractor portion and a collimator portion. Light rays leaving the collimator portion have an angle which matches the entrance angle input requirements of an associated light guide. In another aspect, cooling of LED s is accomplished by reservoirs located in a hand piece and in a base station. In another aspect of the invention, cooling is achieved by use of a heat pip e and a cooling jacket. The cooling jacket may contain a material having a hig h latent heat of fusion at a phase change temperature suitable for cooling the LEDs.
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