Optical: systems and elements – Lens – Including a nonspherical surface
Reexamination Certificate
2005-09-06
2005-09-06
Epps, Georgia (Department: 2873)
Optical: systems and elements
Lens
Including a nonspherical surface
C433S029000
Reexamination Certificate
active
06940659
ABSTRACT:
The invention is directed to lenses having thin walls and a generally conical shape for use with dental light-curing devices. The conical or otherwise tapered shape enables the apex of the lenses to be inserted at least partially within a dental preparation (e.g., a Class II dental preparation). The thin walls allow the light emitted from the light-curing device to pass through the lens and apex without being undesirably refracted, thereby enabling light to be emitted directly in front of the apex with sufficient intensity to cure light-curable compounds within the dental preparation.
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Fischer Dan E.
McLean Bruce S.
Nosov Vasiliy
Epps Georgia
Harrington Alicia M.
Ultradent Products Inc.
Workman Nydegger
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