Abstract: This device is an all-optical digital architecture for carrying out compuions. Residue number system addition and multiplication tables are produced on an optically-addressable plane composed of optically bistable material. The plane of optically bistable material devices represents a residue number system addition or multiplication tables and is addressed by two intersecting signal beams from the top and a bias beam from the bottom. A combination of two signal beams exceeds the material transmission threshold in the intersection region letting bias light emerge as a position encoded signal beam.

Abstract: A system for testing semiconductor microchips is provided in which indivil microchips can be tested electrically and under specific thermal conditions simultaneously to determine the reliability of the microchip under operating conditions. This system is unique and economically operable so as to enable all individual chips to be tested prior to mounting in larger assemblies.

Abstract: A signal flare with luminous oscillations resulting from a combustible cosition of octafluorohexanediol, magnesium or aluminum, chlorinated benzene, an inorganic oxidizer, and polyisocyanate.

Abstract: A specimen holder and rotary mount in which a semiconductor chip can be arately mounted and presented to a test device for checking the circuitry of the semiconductor chip as well as subjecting the chip to various thermal conditions.

Abstract: A hybrid optical correlator which uses a Fourier plane detector to cause adjustment of an image of an object in scale and orientation so that a matched filter can provide a correlation of the object independent of scale and orientation.

Abstract: The solid metal current return in a typical commercial co-axial flashlamp replaced with a light transmissive current return which permits light from either or both surfaces of the flashlamp to be used to pump dye volumes. This enables one flashlamp to pump two dye volumes simultaneously, resulting in a significant increase in the overall efficiency of the co-axial flashlamp-pumped dye laser.

Abstract: Liquid ammonia is maintained at the required operating conditions to efficiently and rapidly achieve propellant demilitarization including recovery of ammonia perchlorate (AP) for reuse, by an environmentally safe method to comminute and remove propellant from existing rocket motor hardware. The method is also applicable to both solid and ground composite propellant which includes scrap or waste propellant. A disclosed demilitarization unit employed in the ammonium perchlorate recovery method is comprised of a supply and high pressure spray system for liquid ammonia, an extraction system, oxidizer recovery system, and an ammonia recovery, drying, and recycling system. The method is workable at ambient temperature since ammonia is liquified under its own vapor pressure at 114 psig; however, increased temperature further enhances the extraction efficiency of the system.

Abstract: A process for figuring the surface of a beryllium mirror to a predetermined urvature wherein the configuration of the mirror surface is sensed to locate areas of the mirror surfaces which are higher than desired and then a stream of phosphoric acid diluted with water and ethylene glycol is directed into contact with the areas of the mirror which are higher than desired while at the same time a current of 10 to 200 milliamps is passed through the stream to the mirror to electro-chemically polish the mirror surface.

Abstract: A method and a product employed in the method for the mechanical and cheml removal of dental plaques are disclosed. The method comprises providing cotton filaments of a size suitable for passing between teeth as a dental floss, chemically impregnating the cotton filaments by soaking in a saturated solution of potassium hydrogen tartrate and potassium hydrogen citrate, subsequently drying the chemically impregnated cotton fibers, and passing the dried chemically impregnated cotton filaments in the form of a dental floss between teeth and over the surfaces of the teeth containing plaque compositions including a calcium phosphate to thereby convert the calcium phosphate to the more soluble compounds calcium citrate and calcium tartrate which go into solution and the plaque is, thus, removed from the surfaces of the teeth.

Abstract: A sensitive infrared polarimeter that measures the amount of degree of rotation of the plane of polarization of plane polarized radiation after the radiation has passed through a wafer of cadmium sulfide. The wafer is placed in a relatively small magnetic field that is varied. Increased sensitivity is realized by using a chopping wheel to chop the laser beam, providing a reference frequency and by detecting the signals with a synchronous detector such as a lock-in amplifier to obtain high signal to noise ratios of the detected signal. The greater sensitivity of the high-sensitivity infrared polarimeter allows electronic carrier concentrations as low as 10.sup.15 cm.sup.-3 to be measured in cadmium sulfide with magnetic fields as low as 0.1 Tesla.

Abstract: An automatic landing system for landing remotely piloted flying vehicles ng a predetermined path and at a predetermined point. The system includes an autopilot carried by the flying vehicle for measuring the parameters of attitude, airspeed, and heading and for comparing the measured parameters with the inputted parameters for the desired attitude, airspeed and heading. The autopilot adjusts the vehicle controls to make it conform to the desired attitude, airspeed and heading when deviations therefrom are detected. The system includes a radar transmitter and receiver means disposed on a stabilized double gimbal for measuring the actual heading and distance from the vehicle to the radar transmitter and receiver on a continuous basis.

Abstract: An aging gauge comprising a container having a fixed or a variable sized t opening with a cap which can be opened to control the sublimation rate of a thermally sublimational material contained within the container. In use, the aging gauge is stored with an item to determine total heat the item is subjected to and also the maximum temperature to which the item has been exposed. The aging gauge container contains a thermally sublimational material such as naphthalene or similar material which has a low sublimation rate over the temperature range from about 70.degree. F. to about 160.degree. F. The aging products determined by analyses of a like item aged along with the aging gauge for which the sublimation amount is determined is employed to establish a calibration curve for future aging evaluation. The aging gauge is provided with a means for determining the maximum temperature exposure (i.e., a thermally indicating material which gives an irreversible color change, Thermocolor pigment).

Abstract: A superconducting, superdirective antenna array wherein a superconductive terial is employed for the elements of the array which are arranged in a uniform half-wave dipole has low ohmic resistance and a very high radiation efficiency. The superdirective antenna array which is a linear array has element spacing less than .lambda.o/2 where .lambda.o is the center frequency of the dipoles. The material of the array elements has a very high critical current (i.e., and a critical magnetic field), a requirement for maximum efficiency. The superconducting, superdirective antenna array is housed in a vacuum insulated container and is provided outlet connecting to means for obtaining and sustaining a vacuum as required for element material of fabrication. The material of fabrication for the antenna array elements is selected from a type II superconductor material selected from the group consisting of iridiumm, lead, mercury, tantalum, vanadium, a composite of niobium-tin-bronze, and alloys of the same.

Abstract: A torque calibrator which has a pair of torque beams with hydraulic cylins for exerting forces on opposite ends of the torque beams and with load cells mounted at opposite ends of the beams for measuring the forces applied to the beams with the beams being designed for a torque cell to be mounted between the beams for having torque applied to the torque cell to calibrate the torque cell.

Abstract: In a method for determining and evaluating nozzle erosion rate, an eroding ozzle and a non-eroding nozzle are employed in a dual nozzle arrangement to receive a balanced thrust and flow rate from a common solid propellant grain of a solid propellant rocket motor when initially fired. When erosion of the eroding nozzle begins an increase in throat area results and the mass discharged through throat increases thereby causing an imbalance in thrust. The erosion is correlated to the mass flow rate of the solid propellant rocket motor by the mathematical relationships, F.sub.2 P.sub.C.sbsb.2 (A.sub.t.sbsb.2 +.DELTA.A.sub.t.sbsb.2)C.sub.F.sbsb.2, wherein F.sub.2 is force, P.sub.C.sbsb.2 is chamber pressure, A.sub.t.sbsb.2 is throat area, .DELTA.A.sub.t.sbsb.2 is change in throat area due to erosion, and C.sub.F.sbsb.2 is the thrust coefficient.

Abstract: A rocket for firing from a tube having open ends wherein a rocket motor sed from a projectile is connected to the projectile by a frangible, ported collar, the front of the motor having a vent for allowing combustion products to flow into the tube between the motor and the projectile. The pressure of the combustion products between the motor and the projectile will break the collar to allow the projectile to exit from the tube at a high velocity.

Abstract: An electro-optic shutter containing liquid crystal material is used to prct optical systems from pulsed laser radiation. The shutter provides the protection by being positioned between the optical system and the pulsed laser radiation and by rapidly alternating between clear and dark states. The alternation occurs in response to the absence or presence of an electric field in the shutter. When the electric field is absent, the shutter becomes clear and admits light and thus visual information whereas presence of the electric field causes the shutter to become dark and prevent the pulsed laser radiation from reaching the optical system. For protection of a binocular system such as the human eyes, in addition to the alternation of clear and dark states of each shutter, the clear-dark cycles of the shutters are staggered to assure that at any given moment at least one optical system is protected.

Abstract: A method of easily detecting a predetermined star pattern by directing imng means in the general direction of the pattern desired to be detected and imaging the star pattern onto a matched filter of a correlator to produce and output that is used to signal a computer to enable the computer to calculate the location of the predetermined star pattern in the field of view.

Abstract: A solid propellant composition employing 2,2-bis(t-butyldicyclopentadienyon)propane (TBD) as the burn rate enhancer in a weight percent from about 2 to about 6 weight percent yields higher threshold values for ignition by impact and improved friction and spark testing values to thereby render the solid propellant composition less hazardous to personnel during handling as compared to similar solid propellant compositions containing Catocene, (2,2-bis(ethyldicylopentadienyliron)propane). The TBD solid propellant composition also comprises from about 9 to about 10 weight percent of hydroxyterminated polybutadiene binder system including an isocyanate curative added in amount of up to 1.0 weight percent and optional modifiers in small amounts with adjustment of the weight percent of other ingredients. Other propellant ingredients comprise a trimodal mix of 200, 1.7, and 0.

Abstract: A multi-sensor buffer interface that couples a multi-sensor inertial measment unit to a missile flight computer. The buffer converts input serial data into 16 bit parallel data and outputs messages of either 6 or 16 words. The buffer will provide computer requested data until the computer changes state of the controlling input signal or until communication between the buffer and the computer fails.