Abstract: Process for treating molten mixtures of fluorozirconate glass to form high purity infrared transparent glass which is essentially free of zirconium fluoride disassociation impurities and anion impurities. The molten mixture or melt is treated with a moisture-free oxygen reactive atmosphere to prevent formation of disassociation impurities or to remove any of these impurities already present in the melt. The melt is also contacted simultaneously or subsequently with a fluorine species reactive gas to remove any oxygen anion impurities formed during the oxygen reactive atmosphere treatment of the melt to thereby provide a glass having complete fluorine stoichiometry and which is free of disassociation and anion impurities.

Abstract: An electron beam controlled switch employing a radial geometry and a Wire-Ion Plasma-Electron gun (WIP E-gun) as an electron source is disclosed. The switch comprises an inner cylinder that serves as the WIP E-gun cathode, a cylindrical grid that serves as the WIP E-gun anode, an array of fine wire anodes disposed in the WIP E-gun ionization chamber, a foil support cylinder to support the foil windows which also serve as the switch anode, and an outer cylinder which also serves as the switch cathode. The WIP E-gun and ionization chamber is gas filled at low pressure, while the switch cavity is filled with a high pressure gas. A voltage pulse is applied to the wire anodes to ionize the gas in the ionization chamber. The ions are extracted through the chamber grid and accelerated through a high voltage to bombard the E-gun cathode.

Abstract: A method and associated means for producing simultaneous electrical representations of the electrical and acoustical (heart sound) activity of the heart, in which a pickup device and associated circuits produce a full wave rectified symmetrical heart sound signal annotated by pulses developed from the QRS wave of the electrocardiogram signal.The pickup device is designed to permit the direct (unbuffered) application of the pickup electrodes to the skin of the body and to provide a control of the associated circuits when not in contact with the body to shorten response times when the pickup device is placed in contact with the body.

Abstract: A process for preparing a liquid metal ion source structure, preferably made from graphite, so that it may be wetted with boron-containing alloys. The process first involves the coating the source structure with elemental boron. The boron is preferably furnished as boron powder in a liquid carrier which may then be coated onto the surface of the source structure substrate. The coated structure is heated for a short time to a temperature whereat the source structure substrate and boron form a liquid layer at the surface of the substrate to "boronize" the substrate. The final wetted source structure is achieved by mixing a small amount of free boron powder with the alloy to be ion evaporated (also in powdered form), coating the previously boronized source structure with this mixture and heating the contacted boron-augmented source alloy and source structure to a temperature of at least the solidus temperature of the source alloy, at which point the source structure is wetted.

Abstract: A method for producing hyperabrupt P.+-. or N.+-. regions in a near-surface layer of a substantially defect free crystal, using solid phase epitaxy and transient annealing. The process for producing a hyperabrupt retrograde distribution of the dopant species begins with amorphizing the near-surface layer of a base crystal, and then implanting a steep retrograde distribution of the desired species into the amorphized layer, so that the retrograde distribution lies entirely within the amorphized layer, thereby avoiding channelling effects during implantation. The substantially defect-free structure of the base crystal is restored by annealing the implanted base crystal at a temperature sufficiently high to induce solid phase epitaxial regrowth on the underlying nonamorphized crystal, but at a temperature sufficiently low to avoid significant diffusion of the implanted species.

Abstract: An apparatus and method pulling a shaped crystalline fiber of a given crystal-forming material from a liquid reservoir of the material. The apparatus includes a vessel in which the liquid material is maintained as a liquid reservoir at a temperature above the melting point or crystal-forming temperature of the material. A die is provided having an inner-tubular surface which includes a crystal shaping portion which is tapered. The liquid flows from the reservoir through the die so that the liquid flows from the narrow end of the shaping portion to the wide end of the shaping portion. The temperature of the liquid crystal growth material is selectively lowered at the top end of the die to form crystalline material which is continually pulled from the crystal-liquid interface.

Abstract: Feed-through vias (38) of 8 mil and smaller diameter are placed on 25 mil centers or smaller so that the feed-through vias serve only as electrical connections and do not block channels between conductors (24a and 42a). The method for forming such feed-through vias and interconnections utilizes a metallic resist (36 and 40) which covers the feed-through vias so that the metallic resist, along with conventional photoresist material, prevent undesired etching of the feed-through vias even in the event of misregistration of the photoresist material.

Abstract: A method for fabricating supported fine line electrical conductors comprises the steps of forming a pattern (16) which defines a configuration (18) of the desired conductors on a surface (12), placing electrically conductive material on the surface in a configuration defined by the pattern to form electrical conductors (20), removing only the pattern from the surface and thus leaving the configured electrical conductors thereon, adhering a support (22) to the electrical conductors with an adherence which is greater than that existing between the conductors and the surface, and separating the assembled conductors and support from the surface. One of the surface and of the support and assembled conductors is flexible and the other is relatively rigid, so that the flexible one can be peeled away from the rigid other.

Abstract: An electrically energizable high intensity, radiant energy heater (8) having a general M-shape for providing a pocket (20) for localized high intensity isothermal heating for fusion and fiber processing. The heater is shaped to provide easy access for a fiber (18) at an entry (16) to enable insertion of the fiber into the isothermal high temperature zone in pocket (20). A second re-entrant wall external to the pocket provides radiant shielding and buffers the isothermal heating zone from the cool environment. The heater may be constructed from a ribbon of a resistively heated metal, such as platinum foil.

Abstract: In this invention, the resolution is enhanced by first effectively decreasing the scan angle subtended between adjacent samples significantly below that of the Rayleigh limit to obtain an image blurred by the point spread function (or diffraction pattern) of the aperture. The next step is to process this blurred image to at least partially remove the blur. The unblurring process consists of convolving this finely sampled blurred image with a specially designed convolution mask. This mask effectively outputs an enhanced pixel at each step of the convolution.The mask simultaneously performs the equivalent of the following operations:(1) blur the image again;(2) subtract this reblurred image from the original image to form degradation estimates; and(3) add the estimates of the losses back into the original image.