Abstract: An apparatus detects a transient thermal gradient in a substrate. The apparatus is comprised of an electromagnetic radiation source configured to emit source electromagnetic radiation; a fast shutter configured to block the source electromagnetic radiation when closed, and open in response to a command to pulse the source electromagnetic radiation; a substrate support that supports a substrate disposed to emit a pulsed radiation from a back side of the substrate when the source electromagnetic radiation is pulsed through the substrate; and a detector configured to face the back side of the substrate. The detector is used to detect a transient thermal gradient in the pulsed radiation.

Abstract: A low magnification mode of operation of a multiple field of view optical system is based on off-axis reflective afocal assemblies with a common optical exit pupil and having a common mechanical axis of rotation which provides both field of view switching and image de-roll functions. A reflective afocal switching assembly permits variable fields of view while at the same time providing a common axis and mechanism to achieve an optical de-roll of the image. This complex arrangement provides a relatively large change in magnification for an all-reflective optical system than can image over 0.4-12.0 micron spectrum.

Abstract: A preferred method of optimizing a Ga-nitride device material structure for a frequency multiplication device comprises: determining the amplitude and frequency of the input signal being multiplied in frequency; providing a Ga-nitride region on a substrate; determining the Al percentage composition and impurity doping in an AlGaN region positioned on the Ga-nitride region based upon the power level and waveform of the input signal and the desired frequency range in order to optimize power input/output efficiency; and selecting an orientation of N-face polar GaN or Ga-face polar GaN material relative to the AlGaN/GaN interface so as to orient the face of the GaN so as to optimize charge at the AlGaN/GaN interface. A preferred embodiment comprises an anti-serial Schottky varactor comprising: two Schottky diodes in anti-serial connection; each comprising at least one GaN layer designed based upon doping and thickness to improve the conversion efficiency.

Abstract: An individual mine launcher is designed to pneumatically launch high explve VOLCANO and MOPMS mines to simulate flight and impact typically encountered in field use. Electronic components and controls are used to monitor and initiate the arming sequence of the mine. Two configurations are used with the same pneumatic and electronic controls. The air-launch configuration allows the mine to be launched into the air at various specified testing elevation angles. The control impact configuration shoots the mine into a chamber where the mine hits an impact surface and then falls into a test monitoring area below.

Abstract: An output driver circuit for fast memories and microprocessors and the li The driver circuit is responsive to a binary input voltage and includes first and second signal control paths respectively coupled to a pair of series connected output stage transistors coupled between two high and low reference voltages and switched alternately between conducting and non-conducting states in mutual opposition to provide a binary output voltage substantially equal to either of the two reference voltages depending upon the binary state of the input voltage. Additionally included is an anticipatory circuit having means responsive to both an externally applied precharge signal and a feedback signal corresponding to the binary state of the output voltage which alternately predrive the transistors close to their respective conducting switching points for increasing the speed of transition of the transistors between conductive and non-conductive states.

Abstract: An array of semiconductive photoconductor detectors is formed on a substr with which the array forms a heterojunction. The array has a whole or partial overlayer of the same material as the substrate. Ohmic connections are made on the detectors and conductive read-out leads are connected to these connections; the leads are made of a conductor that forms a Schottky barrier with the substrate and overlayer. Ohmic connections are made to the substrate and overlayer such that a voltage bias may be applied between the substrate-overlayer combination and the array. The bais is used to control the accumulation layer in the substrate beneath the array in order to maximize sesitivity.

Abstract: A laser beam pointing aid for field testing of breadboard laser systems and tilizing a hollow housing with apertures at each end and with crosshairs at one end of the housing and a telescope adjustably mounted to the hollow housing and being positionable relative to an output beam from a laser system to allow one to utilize the last mirror of the laser system and the laser beam pointing aid to accurately point the laser beam to a target.

Abstract: An inspection method and apparatus for the deposition of a liquid material o a part in a manufacturing process. The method utilizes electrical continuity techniques to determine actual application and also controlling the dispensed volume of material.

Abstract: Methyltricarboranylmethyl perchlorate is disclosed along with its synthesis nd its use in a solid composite propellant. Three carboranyl groups and a perchlorate group are contained in the intramolecular perchlorate salt, methyltricarboranylmethyl perchlorate, which is used as a partial replacement for ammonium perchlorate and as a replacement for liquid carborane catalyst-plasticizer compounds to achieve ultrahigh burning rates for propellants. The perchlorate salt when incorporated into a propellant composition contributes to the oxidizer function, and in addition, since three carboranyl groups are present in each molecule of the salt, the burning rate catalysis function is accomplished without having to incorporate separate burning rate catalysts.

Abstract: The disclosed firearm comprises a stationary receiver or frame, a breech ck pivotally mounted at its lower end on the receiver and engaging a forward-facing abutment on the receiver in firing position, a barrel slidably mounted near its forward end on the receiver and pivotally connected at its rear end to the upper end of the breech block. Forward movement of the barrel to open the breech at the rear of the barrel bore during firing is prevented by the pivotal connection and the firing reaction on the breech block. The barrel can be moved forward after firing to move the rear end thereof forward and downward to open the breech. The firearm also includes a barrel latch automatically released by the hammer during firing, an extractor-ejector member actuated by the breech block during the opening of the breech, and a hammer-cocking means also actuated by the opening of the breech.