Abstract: A pair of rail adapters which replace visor rails used on the U.S. Army Ahe helmets, i.e. the AH-64 helmet. The rail adapters have a concave inner portion that is form fitted and attachable to the Apache helmet, with one rail adapter on each of the right and left upper front sides of the Apache helmet. The rail adapters have a convex outer portion that interface and is attachable with a visor guard Aviator's Night Vision Imaging System (ANVIS) goggle assembly and visor which are normally used with the U.S. Army ANVIS helmet, i.e. the SPH-4 helmet. Each of the rail adapters is made in one piece which has a thick upper portion with a half dovetailed open track in which the outer portion of the visor guard is attachable thereto. The rail adapters have a thin lower portion which provides clearance with the visor and the ANVIS goggle assembly when the visor and the assembly are in the line of sight position.

Abstract: The present invention provides layered polymeric devices to control the sial and spectral distribution of energy in optical beams, particularly high-intensity laser beams. These devices include improved versions of prior art thin-film (vacuum-deposited) interference filters, rugate structure anti-reflection coatings, Q-switches, pulse shapers, modulators, optical bistable devices and the like.

Abstract: This invention relates to a method for preparing radium-free standard solutions of radon-222-in-water of known concentration for use in the more accurate calibrating of liquid scintillation counters than obtainable by the use of radium-226 as standards for calibration. A radium-free radon-in-water standard of the type contemplated herein is defined as a known volume of deionized water with a known activity of radon gas without the presence of any radium activity. This new method provides for the rapid, accurate and inexpensive analysis of Radon-222 water samples by utilizing standards whose activity is derived from actual instrumental quantitative analysis as opposed to problematical mathematical derivation.

Abstract: A helmet mounting structure for mounting aviator goggles to an Army Apache elmet. The structure is a single piece that is formed and shaped to conform to the curvature of the front portion of the Apache helmet and is held firmly thereto by specially designed screws that are loosely held by the single piece structure and are threaded into at least two mounting points on each of the left and right sides of the helmet. A breakaway mount support pad, formed in the center front of the mounting structure and extends downward therefrom, has a breakaway mount thereto. The goggles may then be connected to the breakaway mount attached for swiveling up to the stow position or down in the line of sight of the aviator.

Abstract: The invention provides adaptive modules which combine with an aided target ecognizer ATR to program or reprogram its circuitry while detecting existing targets. The signatures thus derived are more likely to produce accurate target classifications than the mathematically derived algorithms currently used. To insure accuracy during this programming a human observer is included in the network loops provided by the modules and provided with overriding decision capability.

Abstract: New fiber optic elements and a new microchannel plate forming method for ximity focussed image intensifier tubes and a method for making them are provided. Higher resolution is provided at the center of the field of view by the use of graded fiber and channel sizes and by the use of convex and concave surfaces in proximity focus.

Abstract: The emissivity of camouflage material is determined from the apparent body emperature measured by a radiometer, calibrated to indicate a temperature of a blackbody would emit corresponding to the radiation received therefrom; and the true temperature of the material and the true temperature at an infrared detector of the radiometer of a radiometer. Computation means is provided for calculating emissivity from the so measured temperatures and for displaying the result.

Abstract: A novel conversion coating composition and a method for treating corroded eel surfaces to convert them into a suitable substrate for accepting organic coatings are provided. Corroded steel surfaces treated with the novel composition of this invention by the improved method of application disclosed in this invention show wet adhesion and salt spray resistance properties markedly superior to those of surfaces which were treated with conventional, prior-art, commercially available compositions.

Abstract: A portable mat assembly for combat soldiers suitable for battlefield emplment preferably as an overhead cover assembly for supporting a load of loose and/or sandbagged soil over a foxhole battle position to provide occupants of the position protection against high velocity ballistic fragments and blast overpressure produced by near-miss indirect fire, but also adaptable for use as camouflage, as a foot bridge across a narrow ravine or ditch, or as revetment, or any other general utilitarian function, wherein the overhead cover assembly comprises a soil supporting member including a fabric membrane; a support net disposed beneath the fabric membrane, substantially fully co-extensive therewith and attached thereto, the support net including a plurality of longitudinally extending principal load carrying or reinforcing stringers, a plurality of transversely extending bracing elements or straps interconnected with the longitudinal straps or stringers; wherein deadman sleeve members provided on the fabric membrane

Abstract: Apparatus and method for producing laser radiation from an element of a binary (or more complex) compound pumped by microwave energy. The energy causes the compound to dissociate and for the one element of the compound to go to its first excited state, this state being metastable. As the element emits radiation, it reverts to its ground state and recombines to form a compound (which may be the original compound) capable of being dissociated by the microwave energy and repeating the process.

Abstract: The invention provides a test system and method using E-Beam techniques to characterize LSI photodiode arrays in both their electrical and optical properties.

Abstract: A wafer battery has a light-emitting diode attached to its jacket, with one ead of the diode soldered to the battery jacket, and the other lead extending around the battery and overhanging its anode. The combination of diode and battery is encapsulated in a cover of elastomeric material, with a pressure-sensitive adhesive on one side. The bezel is applied to crystal of an instrument such as a meter, gauge, or the like and illuminates the gauge when a series connection is completed between the battery and light-emitting diode by pressing the cover over the battery anode to make the light-emitting diode lead contact the anode. The bezel is small with respect to the surface area of the crystal to which it is applied, in order that is not obscure the scale, dial, or face of the instrument. An alternate embodiment has one lead of the light-emitting diode soldered to the battery anode and the other lead extending over the side of the battery jacket.

Abstract: A rapidly tunable low pressure laser comprised of a one electrode pair low ressure CO.sub.2 gas laser gain cell and intra-cavity quarterwave plate and Q-switch. The cell has a fixed laser output coupled at one end of the laser cavity and at the other end of the cavity a wavelength switching device which changes laser lines in less than 1.times.10.sup.-3 .mu.sec, i.e. changes the wavelengths in less than 1 millisecond within the low pressure laser, to produce at least two quick pulses of different wavelengths at a separation of 1 millisecond. The wavelength switching device is comprised of a fast rotating mirror on the laser optical axis and a fixed grating, or a rotating grating on the optical axis.

Abstract: A sublimable layer is deposited on a substrate, holes are etched through sublimable layer, a thin-layer structure is deposited on portions of the remaining sublimable layer, and a thick structural support material is deposited to cover the sides and bottoms of the holes and portions of the thin-layer structure. When the sublimable layer is sublimed with the heat, photon enhancement (ultraviolet light) and oxygen purging, a structure is left which consists of a thin layer or layers supported by posts above a substrate.

Abstract: A contact lens is made either with a laser-reflecting or absorbing layer edded in a transparent optical lens material, or formed as a layer on the convex side of such a material. The layer may be a Fabry-Perot reflector or a thin-film or holographically formed reflective or absorptive interference filter, or an absorbing layer.

Abstract: Collimated incident optical radiation which might contain high-intensity or igh-power radiation is focused into the body of a limiter by a first lens formed at one end of the limiter. The body is a cylinder of revolution with an axis along the optical axis between radiation and a sensitive detector. Radiation of normal intensity or power freely passes through the body and is recollimated by a second lens formed at the other end of the limiter from the first lens. The body is made of material which is subject to two-photon absorption such that high-intensity or high-power radiation undergoes absorption and is consequently self-defocused such that it is diverted from the optical path. For visible light, the material may be ZeSe or ZnS; for ultraviolet, copper chloride; for infrared, HgCgTe.

Abstract: A portable laser designator is provided having a highly efficient slab type SGG:Cr:Nd output laser with a phase conjugation mirror and compact folded optical system.

Abstract: A real time coding system for the transmission and reception of pictorial o-dimensional information at television (TV) rates. In one coding system, the input signal and a coding signal are modulo added in an operational amplifier and are transmitted therefrom as a coded signal, which may be a coded video signal. In the receiver, an operational amplifier receives the coded video signal along with an exact replica of the coding signal. The coding signal is subtracted from the coded video signal wherein the resulting original input signal is produced and fed to a TV type display, such as a CRT or electroluminescent flat panel. In a second coding system, a coding pattern is comprised of a transparent matrix structure which is substituted for a time varying signal. A flying spot scanner receives a voltage input signal from an operational amplifier and is controlled by a selected code for selectively scanning the transparent coding pattern matrix.

Abstract: A device for supporting a laser output mirror and allowing easy adjustment f the mirror, including a flexible ring carrying the mirror. The ring is supported by a part secured to the laser housing. The part also carries a plate with adjusting screws therethrough and bearing on the ring, the screws being inclined with respect to the optical axis of the housing. Thus, one is able to adjust the adjusting screws without exposing one's hands to the laser beam.

Abstract: A process of high pressure close-space epitaxy in the semi-confined atmosre of a reusable demountable ampule in a furnace growth chamber. The ampule has a substrate and source materials placed therein whereupon the ampule is then loaded in the pressure furnace and the furnace is sealed air tight. Alternate steps of high pressure gas scrubbing and evacuating the interior of the furnace growth chamber including the interior of the ampule through small vents are first used to purify the growth environment. The source materials are then epitaxially grown on the substrate at a high pressure within the ampule. The ampule may be repeatedly used without having to be destroyed after each growth.