Abstract: A dual mode antenna that allows both millimeter wave and infrared radiation o enter a single aperture and propagate through a common transmission device to a point where the respective energies are divided to follow separate paths for subsequent processing. An electromagnetic transmission guide or waveguide for the system comprises a tubular waveguide member, having a beam directing lens or lenses therein, for maintianing low-loss, gaussian beam propagation of millimeter wave energy therethrough. A waveguide fiber array is coupled into or adjacent to the tubular member at one end and retrieves the infrared radiation but allows the millimeter wave radiatin to pass. Cassegrainian optics are positioned adjacent the other end of the tubular member for directing incoming millimeter and infrared energy into the guide. Subsequently, the energy impinges on the beam directing lens means that separates the respective energies, dividing them into two separate and distinct paths.

Abstract: A rocket motor that has a fast burning propellant therein with a dispenser rrangement for dispensing a fluid chemical suppressant into the exhaust gases of the solid propellant for reducing the flash signature.

Abstract: The pulsed gas supply consists of a cylindrical gas reservoir which conta a multiplicity of small release ports in a helical pattern and an inner cylindrical rotary valve which also contains a multiplicity of small release ports in the same helical pattern. The reservoir and valve constitute an integral unit which has the advantage of totally balanced forces on a single moving part. This allows for motion free of friction caused by the high pressures of the gas supply.

Abstract: A laser gyro has two adjacent laser cavities which are parallel and separated so that there are no common parts between the respective mode volumes. Each cavity supports a wave traveling in only one direction. Passive optical means external to the cavities are provided for establishing these directions of travel. Additionally, the passive means allows quick reversal of these directions of travel, which allows for the compensation of all frequency shifts which are not proportional to rotations. The passive reversal is accomplished with an optical element that is controlled to act alternately as a window and then as a mirror for light of only one wavelength. The gyro produces two output waves whose frequencies are shifted in opposite directions by rotation. The two frequencies are mixed and the resultant beat frequency is detected by optical heterodyning. The response is a linear output signal. Very low rotation rates may be sensed down to zero rotation and its accuracy is limited by quantum effects.

Abstract: A method and design are disclosed for the introduction of ammonia gas into he rocket motor gas environment wherein the ammonia gas functions to suppress the flash signature.The firing and pressurization of a sealed container having suppressant vents results in the rupturing of one or more seals for the container containing clathrate means from which adsorbed liquid or gaseus ammonia is boiled out and discharged and mixed with combustion gases prior to being discharged through the exhaust nozzle of a rocket motor.The design for the container for containing clathrate means include as part of one embodiment a toroidal shaped container for installing within the rocket motor exhaust nozzle wherein the container functions as the throat of the exhaust nozzle of the rocket motor. Other embodiments feature the clathrate means in a sealed container which additionally houses the ignitor means.

Abstract: In a Sagnac-type of laser accelerometer, a common waveguide transducing element has oppositely rotating optical beams therein which are subsequently combined in a detection circuit to provide an output indicative of acceleration perpendicular to the plane of the transducing element. The counter rotating beams are ninety degrees polarized while passing through the transducer, so that only one beam is affected by the stress forces. The beams are shifted to the same polarization before interference fringes are developed on the detector.

Abstract: A dual mode antenna that allows both millimeter wave radiated energy and rared radiated energy to enter a single aperture and propagate through a common transmission device to a point where the respective energies are divided to follow separate paths for subsequent processing. An electromagnetic transmission guide for waveguide comprises first and second parallel tubular members having beam directing reflectors and lenses therein for maintaining low-loss, gaussian beam propagation of radiated energy therethrough. Cassegrainian optics of a cassegrainian antenna system are positioned for directing the millimeter and infrared energy into a common, circular end of said tubes where the energy impinges on beam directing means that separates the respective energies, directing them into the respective parallel tubes along two separate and distinct paths.

Abstract: A retainer mechanism for releasably securing a kinetic energy penetrator to he forward end of a missile while the missile is stored, transported and subsequently fired at a target such as a tank. The retainer releases the penetrator in flight responsive to acceleration acting on the missile, to reduce drag on the penetrator in its travel to the target.

Abstract: A system for an electronically controlled array for the simulation of passive signatures and noise at millimeter wavelengths. The system can simulate passive background signatures and also superimpose radiation intensity variation to simulate either moving or stationary passive signatures of targets over or within the background. A single, non-varying source of millimeter waves provides the non-coherent radiation for illumination that is required for simulating passive signatures. A controlled array variably controls radiation intensity at each illumination point of the array. The non-varying source is concentrated at the focal axis of a parabolic reflector, providing a plane wavefront of radiated energy.

Abstract: A new mid-infrared laser in hydrogen which produces an output when excited by a high voltage pulse discharge in a long, low loss cavity to produce laser action in three or more lines as output pulses with lengths varying from less than 1 microsecond to over 6 microseconds with wavelengths in the 3 .mu.m band including 3.71 .mu.m, 3.77 .mu.m, and 3.84 .mu.m.

Abstract: A closed loop dynamic alignment fixture which has a pivot plate which is pted to have a rate gyro mounted thereon and a base which is adapted to be mounted on a rate table with means for automatically adjusting the pivot plate relative to the base plate and rate table to allow for the testing of the amount of misalignment of an input axis of the rate gyro that is mounted thereon to allow misalignment data to be gathered on high drift rate gyros.

Abstract: A remote laser locator system for viewing a wide field of view and detecting the angular position of a remote laser. A laser beam directed toward the sensor from any position within a 90 degree circular field-of-view can be detected to a positional accuracy of less than 0.1 degree in a two-axis coordinate system. The system utilizes an inline or coaxial optical sensor having field-of-view (FOV) optics that compress the field-of-view. The compressed output from the FOV optics is directed through a polarizer and filter to a phase shifter. The phase shifter, a pair of birefringent crystals, encodes the angle of incidence of the laser beam as a phase shift between the two components of the polarized input beam. Subsequently, an analyzer such as a Wollaston prism decomposes the beam into two linear component beams. These component beams are processed through a second phase shifter and an analyzer pair which are rotated axially with respect to the first pair to provide four distinct component beams.

Abstract: A laser position sensor system for viewing a wide field of view for detecting the angular position of a remote laser. A laser beam directed toward the sensor from any position within a 90 degree circular field-of-view can be detected to a positional accuracy of less than 0.1 degree in a two-axis coordinate system. The system utilizes two parallel sensors having field-of-view optics that compress the field-of-view. The compressed output from each optics is directed through a polarizer and filter to a phase shifter. The phase shifter, a pair of birefringent crystals, encodes the angle of incidence of the laser beam as a phase shift between the two components of the polarized input beam. These components, the e-ray and the o-ray travel different paths through the phase shifter. Subsequently, an analyzer such as a Wollaston prism decomposes the beam into two linear components. These components are condensed through a reimager lens and coupled to a pair of intensity detectors.

Abstract: A rocket motor is disclosed which employs a Class 1.1 detonatable composition which is both a propellant and explosive. One grain design is configured to give a high boost acceleration during the burning phase of a perforated portion of the grain. The internally burning grain subsequently changes to an end-burning grain which provides a sustaining thrust burning period. The rocket motor flies to target with the burning surface progressing towards the head end. The rocket burns to target, but the design always provides some remaining propellant which serves as the warhead explosive on impact with the target. Detonator means cause the remaining unburned propellant to denonate at target impact or prior to target impact. This rocket motor design does not provide for separation between the warhead and the motor case. Therefore, the complete rocket motor travels to the target area.

Abstract: Apparatus for measuring force and displacement by measuring Moire fringe fts in response to relative movement between a pair of mirrors which reflect light beams therefrom to an interaction region. A pair of electro-optical sensors is positioned to view the interference region and detect fringe shifts responsive to relative movement between the mirrors.

Abstract: Improved method of manufacturing composite rocket motor cases and laminated tructures is disclosed which includes a layered procedure wherein a high percentage of a highly flexibilized, low-modulus epoxy blend of a resin composition is employed in the matrix of the innermost layer section with a subsequent, gradual addition of a toughened (or hard) high-modulus resin to the filament impregnating bath during the filament winding process to achieve a higher-modulus resin composition in the intervening layers with the highest modulus resin composition being in the outermost layer section to achieve a gradation in mechanical properties to mechanical behavior.

Abstract: Asymmetric side exhausting nozzles are provided for exhausting propulsion ses of a rocket to the side of the rocket to provide a performance gain of from 1 to three percent over axis symmetric side exhausting nozzles.