Abstract: A modified Michelson type of interferometer having a pair of substantially identical refractive prisms, each having a cross sectional shape of 1/2 of a hexagon, the division being along a line bisecting opposite sides of the hexagon, where each of the prisms has a side for beam input or output, a side that is coated to provide a mirror for beam reflection and a beamsplitter coating applied to one of the two surfaces along the line of division. Additionally, a collimating and/or focusing lens may be integral with the prism having the input or output side, such that linear, constant speed, relative scanning of the prisms in the direction of the line of division of the prisms enables the elimination of the mounting of all components, made a part of or attached to the prisms, to an optical bench.

Abstract: An interferometer/spectroradiometer that uses a beamsplitter means for dividing an input beam into two separate beams and presents the resultant beams to a rotary refractive window from symmetrically oriented optical elements such that the optical path differences through the refractive window as it rotates are additive and non-linearities are subtracted. The beams are returned through the refractive window to the beamsplitter for dividing the input beam, where fringes are generated for application to appropriate detectors. The detector output is applied to Fourier transform computer equipment for digitizing and processing for presentation on a spectrum display device.

Abstract: A reversible, variably inclinable window with controlled convection for mounting in a window casing in a building for solar heating and cooling comprising a window frame having top and bottom portions and being adapted to pivot about a horizontal axis intermediate said portions, a first window panel mounted in said frame capable of transmitting both visible and infrared radiation, a second window panel mounted in said frame, substantially parallel and in a spaced relationship to said first window panel and being capable of transmitting visible radiation and blocking infrared radiation, and openings proximate to said top and bottom portions for providing air passageways to space between said first and second window panels such that rotation of the assembly about its horizontal axis can place either of the panels toward the outside of the building for selective reflection or absorbtion of the radiant energy to enable heating or cooling of the interior space between the panels in order to utilize the properties

Abstract: A method and system for disrupting discrete keyed continuous wave radio communications wherein the discrete keyed continuous wave communications signal conveys intelligence by virtue of the duration and spacing of a coded series of characters by insertion of additional character representing signals within the spaces between the characters of the original signal, thereby changing the coded series and thus depriving the intended recipient of the original intelligence.

Abstract: An intrusion detection system utilizes a radio frequency radiative system whose near electromagnetic field is monitored by receiving devices which respond, in a measurable way, to any disturbance of the near electromagnetic field by physical intrusion.

Abstract: The detection, location and tracking of an intruder in an area to be protected is accomplished by dividing the area into a multiplicity of discrete regions, transmitting r.f. signals from transmitting transducers that comprise lengths of transmission lines deployed along the boundaries of the discrete regions, and receiving intrusion occurrence signals from receiving transducers located within each region. Violation of a boundary by an intruder results in an intrusion signal from the receiving transducers of as many as four possible adjacent regions thereby indicating an intrusion event. A coincidence logic circuit indicates which boundary has been violated. Intrusion occurrence signals are stored for suitable periods of time while past and current intrusion events are indicated on a display in order to locate and track intruders.

Abstract: Gating apparatus for a static crossed field photomultiplier utilizes a gating electrode which is mounted in a position between the cathode and the rail electrode. The gating electrode is pulsed thus causing the cathode current to be either multiplied or diverted so as to modulate the current by shifting the cathode beam into and out of the dynode area where secondary amplification occurs.

Abstract: A method for synthesizing perfluoropolyethers by effecting addition reactions under low temperature photolysis between perfluoroolefins, perfluorodialkyl peroxides and fluoroxyperfluoroalkanes resulting in the snythesis of new compounds.

Abstract: 1. A Doppler decoy protection device comprising a missile capable of being launched from a space craft whose protection is sought, and to travel in advance thereof and at a speed greater than the speed of said space craft, guide means extendable rearwardly from said missile, Doppler decoy means slidable on said guide means for simulating the Doppler characteristics of the craft whose protection is sought, means for damping the speed of travel of said decoy means rearwardly on said guide means so that the resultant forward speed of said decoy means will substantially equal the speed of the craft whose protection is sought.

Abstract: For use in a body of water having variable levels, means sealing channels to the banks of said body of water, and floatable means extending across said body of water and into said channels capable of holding back petroleum products and other floatable debris released upstream into said body of water.

Abstract: The generation of controlled, electromagnetic, coherent, microwave radiation from a warm, uniform plasma at approximately twice the electron plasma frequency by means of two oppositely directed streams of high energy electrons and the coupling of the resulting coherent, electromagnetic radiation from a cavity resonator into external circuitry, wherein the two opposing streams of high energy electrons directed into the warm, uniform plasma result in a conversion of electron beam and plasma energies into transverse electromagnetic radiation from 10 to 100 times that which is possible with a single electron beam-plasma system.

Abstract: A cylindrical reflector or lens is used under aberrated conditions in conjunction with an enlarged primary collector to obtain wide angle scanning performance that will allow concentration of solar radiation without extensive tracking.

Abstract: A technique and apparatus for two dimensional pattern analysis utilizing a transform of the pattern enables the extraction of desired pattern information by means of spatial filtering in accordance with known human visual system processing. Two dimensional spatial frequencies resulting from the transform are acted on by either anisotropic or uniquely used conventional filters to extract one, two and three dimensional pattern information from spatial frequency subsets to determine general form, edge, texture and depth information for detection, identification and classification of objects in simple or complex scenes.

Abstract: An improved latch for use on munition shipping containers or the like for operation with any commonly available tool which increases the mechanical advantage to provide high opening and closing forces while avoiding exposed easily damaged surfaces. The large exposed surfaces on presently available hand operated latches are eliminated thereby preventing damage resulting from accidental hooking on projecting surfaces and/or adjacent latches.

Abstract: The generation of controlled, electromagnetic, coherent, microwave radiation from a warm, uniform plasma at approximately twice the plasma frequency by means of a source of high energy electrons being directed into a plasma and coupling the resultant energy from a cavity resonator to external circuitry.