Patent ID: 7857619
Filing Date: 2010-12-28
Classification: A61C,G02B

Abstract:
1. A curing light apparatus for curing a light activated composite, comprising: a plurality of LED sources configured to collectively emit a divergent curing light adapted to cure the light activated composite; a lens mounting reflector having a high reflectance inner surface and configured adjacent to the plurality of LED sources to reflect a portion of the divergent curing light; a Fresnel lens pair including a first Fresnel lens and a second Fresnel lens, adjacent to each other in cascaded series and configured to focus the divergent curing light, the Fresnel lens pair directly secured with respect to the lens mounting reflector and configured to direct the focused curing light directly to the composite; the first Fresnel lens has a focal length of approximately between about 2 to about 10 millimeters and is configured to collect and collimate the divergent curing light from each of the plurality of LED sources; and the second Fresnel lens has a focal length of approximately between about 2 to about 20 millimeters and is configured to focus the collimated curing light to the composite with increasing intensity as a function of distance.