Abstract: An apparatus for disinfecting contact lenses by use of microwave energy is disclosed wherein a disinfecting fluid is stored in a first chamber and transferred to a second compartment when exposed to microwave energy. The second compartment holds the lenses to be disinfected and is shielded by a microwave deflecting substance.
Type:
Grant
Filed:
April 20, 1990
Date of Patent:
November 17, 1992
Assignee:
Bausch & Lomb Incorporated
Inventors:
Stephen F. Stepanski, Kelvin H. Wildman
Abstract: A riflescope is disclosed which is manufactured from impregnated carbon fibers so as to be light weight, exceedingly strong and have essentially a zero coefficient of thermal expansion.
Abstract: A lens system comprises a pair of corrective lenses whose surfaces are divided into a series of substantially discrete near and distant vision zones whose dimensions and positions are such that, relative to the line of sight of the right and left eye respectively, each zone on one lens containing the distance power correction corresponds to a similar zone on the other lens containing the near power correction.
Abstract: A diffractive bifocal eye lens, an otpical system, and processes for fabrication of such lenses are disclosed. The optical system includes the following principal elements in optical alignment along an optical axis, for accomplishing the indicated steps of the process: a laser for emission of ultraviolet light along the optical axis; a zone plate mask in the path of irradiation by the laser; and an imaging lens to project, with radiation from the laser, an image of the mask on the concave inner surface of an eye lens mounted coincident with the image surface of the optical system, thereby ablating the eye lens imagewise of the mask to generate a phase zone plate on the eye lens. The laser beam scans the zone plate mask to generate a composite image on the image surface. Alternatively, the phase zone plate is generated on the concave surface of a glass blank at the image surface to form a tool from which molds, and in turn lenses, are replicated.