Method and apparatus for detecting lenses in package
AssigneeBausch & Lomb Incorporated
InventorsRobert Duggan, Ted Foos, Liam Power, Paul A. Merritt, Duncan Westland, Peter Morgan
Life of this patent
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Abstract
A method and apparatus for detecting under- or over-filling of lenses in packages where ultraviolet radiation is directed to the package.
Claims13
A method comprising aligning an ophthalmic lens package with an ultraviolet radiation detection system and confirming the presence or absence of a lens in the package, wherein the ultraviolet detection system comprises a source of ultraviolet radiation directed through the package and a receiver to detect at least a portion of the radiation transmitted from the package to the receiver, the receiver detecting a first wavelength of ultraviolet radiation and a second wavelength of ultraviolet radiation, wherein radiation at the first wavelength is absorbed primarily by the lens material, and radiation at the second wavelength is absorbed primarily by the package.
An apparatus comprising an ultraviolet detection system arranged that recognizes the presence or absence of an ophthalmic lens in a package, wherein the ultraviolet detection system comprises an ultraviolet radiation source directed to the package, first and second receivers to detect at least a portion of the radiation transmitted from the package to the receivers, a first filter that directs filtered radiation at a first wavelength to the first receiver, and a second filter that directs filtered radiation at a second wavelength to the second receiver.
Dependencies are inferred from the claim text.