Abstract: A lens suitable for implantation in the eye is provided with laterally extending iris clips each having at least one of its ends locked within the body of the lens. The clips are initially extended through close-fitting openings, terminally beaded and forcefully retracted sufficiently to bury their beaded ends within the lens body. Cold flow of lens material around the beaded ends locks the clips in place.

Abstract: A gas or vapor sensing and alarm device in an air purifying respirator for warning the wearer of hazardous levels of gases or vapors penetrating through the respirator cartridge. An exothermic sensor which can be fitted in the cartridge adaptor or facepiece cavity of the respirator monitors the heat evolved during adsorption of the vapor or gas into the sensor's adsorbent and triggers in alarm when the respirator cartridge has reached the end of its service life.

Abstract: Producing from a single contact lens casting mold, lenses of a number of different sizes by including in the casting precursor for each lens, a controlled amount of an extractable diluent of low volatility which is extracted after casting to cause the resulting lens to shrink a calculable amount. Variations in amounts are used to produce corresponding variations in sizes of cast and extracted lenses.

Abstract: A simple and compact image enhancement system for industrial and medical fiberscopes including in each case adjacent each of opposite ends of the fiber bundle of a fiberscope, a plane parallel optical image transmitting plate and means for oscillating the plate about an axis normal to the fiber bundle axis. With one plate transmitting optical images to one end of the fiber bundle and the other plate transmitting the images away from the opposite end of the bundle, ultimate image enhancement and bundle blemish suppression is accomplished by synchronous oscillation of the two plates.

Abstract: A lens suitable for implantation in the eye is provided with iris clips formed of plastic filaments each having at least one of its ends fastened to the lens. Ends of the clips to be fastened are ferruled for secure and permanent affixation.

Abstract: Warpage-free spectacles comprised of plastic lenses and plastic frames wherein the frames are constructed of materials having the same or lower tensile elastic modulus and/or the same coefficient of thermal expansion as the lens material.

Abstract: A mold for casting a polarizing ophthalmic lens from a fluid thermosetting monomeric resin wherein the mold unit includes convex and a concaved mold elements spaced apart by a peripheral gasket and includes therebetween a polarizing sheet defining first and second molding compartments thereabout such that the polarizing sheet while forming a part of the mold structure is cast in situ in the ophthalmic lens and becomes an integral part thereof.

Abstract: An isolation amplifier comprising three separate conductively-isolated sections: (1) an input section including an AC modulator, (2) an output section including a demodulator, and (3) an improved oscillator or AC power section for reducing the undesirable effects of common mode interference signal sources coupled thereto through stray capacitance. The improved oscillator or power portion includes control elements for controlling the timing and direction of current conduction through the primary winding of a transformer having its secondary connected to the chopper or modulator. The control elements and circuitry associated therewith conduct in alternation and in a manner resulting substantially in conduction-overlap. Such conduction overlap is accomplished by means which accelerate initiation of conduction in one control element and possibly also retard the cessation of conduction in the other control element.

Abstract: A four-component eyepiece for an optometer has an eye relief of about 117mm and is substantially free of chromatic aberration.

Abstract: A high-speed circuit for causing the corpuscular particle beam of a corpuscular particle microprobe such as a scanning electron microscope to be periodically and sequentially displaced from its normal path so as to, in effect, interrupt the beam's bombardment of a specimen during certain of the scanning cycle of the microprobe. In an elementary form, it includes a deflection circuit having a pair of deflection plates disposed such that the beam passes therebetween and a high-speed driving circuit to power the deflection plates, in order to achieve desired rapid response times. The driving circuit includes a high-speed switch of the type of a vertical MOSFET which is, in turn, connected to a current limiting resistance load which, in turn, is connected to the voltage source for the deflection plates.

Abstract: An Achromatic Aplanatic Condenser having a numerical aperture of 1.30 has 3 components.

Abstract: A four-member microscope objective having a numerical aperture of 0.25 provides a magnification of substantially 10.times. and a substantially flat image field of 24mm in combination with a telescope objective as described in U.S. Pat. No. 3,355,234 and a typical 10.times. eyepiece.

Abstract: An improved graphical recorder display system for obtaining an accurate record of one or more sensed and displayed parameter values, such as associated with one or more vital signs of a patient.

Abstract: A flexible fiber optic probe or catheter insertable into the cardiovasular system for monitoring blood oxygen saturation or the like is provided with an improved standard for the calibration of the catheter and its associated electro-optic equipment. The improved calibration standard is particularly suited for catheters of very small diameter, is provided by a generally tubular reflecting member aligned with and adjacent to the distal end of the catheter. The reflecting member may be vinyl tubing or the like which may be removably of fixedly positioned about the distal end of the catheter to reflect light directed thereon from the catheter when in air or a clear sterile solution for calibration.

Abstract: An abrasion-resistant organic optical element comprising a transparent base of a synthetic organic material having an adhering coating of an abrasion-resistant material comprising a polysilicic acid ester of an alcohol containing from 1 to 12 carbon atoms and a partially hydrolyzed vinyl polymer to provide polyvinyl alcohol; the coating being cross-linked with formaldehyde or zirconyl nitrate or mixtures thereof. The abrasion-resistant organic optical elements can comprise sheet material or a lens.

Abstract: A relay lens system for use with a microscope to provide a station having a location optically equivalent to the back focal plane of the microscope objective is improved by using two identical lens components having different front and back focal lengths and arranged on the optical axis with opposite axial orientations. A back aperture viewer may be selectively positioned on the optical axis for viewing an optical element at said station.

Abstract: An adjustable filter regulator for a microspectrophotometer including adjustment means connected to a scale for controlling the setting of the interference filter wherein the filter is moveably connected to a servomotor; follower circuit, differential amplifier, and signal transmitter.

Abstract: Apparatus for utilization in driving a raster-type display, such as is used in the familiar television system for producing a selectable (according to a predetermined group) of raster formats of different raster interlace rates.

Abstract: There is disclosed a process for the production of a spectacle frame high in tensile strength and resistance to permanent set utilizing an age-hardenable nickel-bronze alloy which is capable of being strengthened by a heat-aging treatment step such that the tensile strength and stiffness can be substantially increased. The tendency for the frame to take a permanent set with the application of stress to the frame is, therefore, substantially reduced as compared to a similar spectacle frame not subjected to a heat-aging treatment step or spectacle frames made of alloys which cannot be strengthened by a heat-aging treatment.