LED curing light having fresnel lenses
First Claim
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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.
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Abstract
Disclosed is a LED curing light device for curing of photo-polymerization materials. The device has a plurality of LED sources and a plurality of Fresnel lenses. The LED source is powered and controlled by a drive board and batteries providing high power curing light in the range of 300 to 500 nm and optical power in the range of 100 to 800 mW. The Fresnel lenses couple the curing light efficiently to a focused spot on a curing object
69 Citations
20 Claims
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1. A curing light apparatus for curing a light activated composite, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of making a dental LED curing light apparatus comprising the step of:
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supplying a plurality of LED sources to emit divergent curing light; supplying a lens mounting reflector and a high reflectance inner surface and configured adjacent to said plurality of LED sources; supplying a Fresnel lens pair including a first Fresnel lens to collimate and a second Fresnel lens to focus the divergent curing light, the Fresnel lenses adjacent and parallel to each other in cascaded series and mounted on said lens mounting reflector to direct the curing light directly to a composite; said first Fresnel lens has a focal length approximately between 2 to 10 millimeters to collect and collimate said divergent curing light from said plurality of LED sources simultaneously; said second Fresnel lens has a focal length approximately between about 2 to about 20 millimeters to focus said collimated curing light to said composite with increasing intensity as a function of distance; and said lens mounting reflector is made of one or more materials comprising copper, aluminum and plastics. - View Dependent Claims (11, 12, 13)
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14. A curing light apparatus for curing a light activated composite, comprising:
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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; 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; a LED mounting head wherein the plurality of LED sources are mounted thereto; a body secured to the LED mounting head; and wherein the plurality of LED sources are configured to emit the divergent curing light with an optical power of approximately between 100 mW to 800 mW at a wavelength of approximately between 300 to 500 nm. - View Dependent Claims (15, 16, 17, 18)
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19. A method of making a dental LED curing light apparatus comprising the step of:
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supplying a plurality of LED sources to emit divergent curing light; supplying a lens mounting reflector and a high reflectance inner surface and configured adjacent to said plurality of LED sources; supplying a Fresnel lens pair including a first Fresnel lens to collimate and a second Fresnel lens to focus the divergent curing light, the Fresnel lenses adjacent and parallel to each other in cascaded series and mounted on said lens mounting reflector to direct the curing light directly to a composite; said first Fresnel lens has a focal length approximately between 2 to 10 millimeters to collect and collimate said divergent curing light from said plurality of LED sources simultaneously; said second Fresnel lens has a focal length approximately between about 2 to about 20 millimeters to focus said collimated curing light to said composite with increasing intensity as a function of distance; said lens mounting reflector is made of one or more materials comprising copper, aluminum and plastics; wherein said plurality of LED sources emit the divergent curing light with optical power approximately between 100 to 800 mW at a wavelength approximately between 300 to 500 nm, and wherein each Fresnel lens of said Fresnel lens pair are made from one or more materials selected from the group consisting of polycarbonate, acrylic, rigid vinyl, and polyacrylic. - View Dependent Claims (20)
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Specification