Back to results
US 5,182,588 AGranted
Lens for filtering visible and ultraviolet electromagnetic waves during dental procedures
OwnerRobert D. Maurer, Timothy B. McLaughlininventors
Life of this patent
Estimating the term…
Abstract
Lenses coated with a UV light absorbing coating and a blue light absorbing coating protect the eyes of a dental practitioner from harmful radiation emitted by a light source used during dental curing procedures. The lenses include a clear portion which allows the wearer to view the treated area without a loss of contrast encountered when the treated area is viewed through the portion of the lenses provided with the blue light absorbing coating.
Claims9
A lens for filtering visible and ultraviolet electromagnetic waves emitted by a source of electromagnetic waves used in a dental curing procedure, the lens comprising:
- an ophthalmic lens, the ophthalmic lens including a first lens surface having a blocking portion that absorbs electromagnetic waves in the visible spectrum having a wavelength of about 530 nanometers or less and ultraviolet electromagnetic waves, and transmits electromagnetic waves in the visible spectrum having a wavelength of about 530 nanometers or greater, the blocking portion occupying less than a lower one-third of the first lens surface.
Dependencies are inferred from the claim text.