Abstract: Photoelectrochemical etching of p-InP in various nitric acid solutions demonstrates that the semiconductor undergoes etching with favorable etch rates in the negative potential region. The etch rate increases with decreasing potentials to -1.0 V and exhibits a slight decrease with lower potentials. Etch rates exhibit a linear relation with relative light intensity. The values of etch rate for p-InP polarized at -1.0 V vary from 0.07 to 1.24 .mu.m/min. for HNO.sub.3 solutions with concentrations ranging from 1.0 to 5.0 M. Etch rates determined in the 4 M acid range were reproducible within 4%. With acid concentrations greater than 5 M, the etch rates were observed to be inconsistent. XPS studies indicated that these inconsistencies are probably due to the formation of organic nitrogen compounds on the surface of p-InP.

Abstract: The present invention modifies the Goldmann-Weeker's dark adaptometer so that all testing may be done automatically and analysis of the data may be completed in a rapid manner and further varied. The automated dark adaptometer is composed of the standard Goldmann-Weeker's dark adactometer having the traditional Ganzfeld bowl attached thereon. A computer acting through a computer interface is connected to a stepper motor and shaft encoder. The stepper motor is connected to the light control knob of the dark adaptometer. The patient being tested inputs responses to a patient signaling switch which is connected to the computer interface. The computer has a program has a specialized program therein for controlling the change in light intensity, recording this change, recording the patients response thereto and any other desired variables.

Abstract: In the present invention, various sizes of non-wetting droplets are inserted into microtube devices of various shapes having therein a gas or wetting fluid which causes the droplets to movement in response to fluid pressure. The droplets may translate within a void of the microtube device which is filled with the gas or wetting fluid or rotate in a fixed position. The nonwetting fluid may also be formed into rings within ring shaped channels. The microtube devices may operate to stop fluid flow, act as a check-valve, act as a flow restrictor, act as a flow regulator, act as a support for a turning axle, and act as a logic device, for example.

Abstract: A optical surface is mounted on a mirror rotating system having a carousel therein having gears which rotates said optical surface in a circular path while the optical surface itself rotates about an axis. The radius between the mirror support and the planetary gear is adjustable. The system is mounted on support legs within the vacuum chamber so that the optical surface can face downward when the apparatus is placed in a bell jar (or any such environment which provides a vacuum). A source of vaporized substance is placed under the apparatus, so that the optical surface, facing downward, is facing said source. This arrangement allows for an improvement in the uniformity of the substance deposited on the optical surface.

Abstract: A high temperature superconducting material is incorporated onto a vehicle for the purpose of reflecting electromagnetic waves while superconducting. The vehicle may be chaff, a decoy, an electronic pod, a satellite, or a space vehicle. Heating and/or cooling is used to control the superconductivity state of the material. By selective use of the material and the substrate to which it is attached, the radar as well as the IR signatures can be altered.

Abstract: The present invention provides a superconducting switch which has a substrate base and a control line patterned thereon. A buffer layer is deposited on top of these and then a superconducting material is deposited and then patterned wherein the superconducting material forms a strip having multiple intersections with the control line. At each intersection between the control line and the superconducting strip is formed a superconducting gate due to the double step edge junction. The control line underneath provides (1) a means for constructing step edge weak link junctions; (2) a means for heating the weak link junctions; and (3) generating an electromagnetic field near the weak link junctions. In combination, a very small magnetic field can be used to decrease the critical current to a very low level.

Abstract: The present invention comprises a microwave mode convert having a cylindrical waveguide input. Attached to the waveguide input is a transition section which gradually changes from the elliptical or cylindrical waveguide input. The output section is also an elliptical waveguide. The output section may also have an elliptical or cylindrical waveguide attached to it. The mode converter of the present invention has input a TM.sub.01 mode microwave energy from a cylindrical waveguide and outputs TE.sub.11 or TEM mode microwave energy which is an elliptical or circular pencil beam of radiation with high directivity.

Abstract: The aircraft wash rack has a supporting frame being attached to the hangar ceiling and a safety track being specifically constructed for the particular aircraft shape is attached to the supporting frame. In order to construct the safety track, the aircraft is placed in the position where the cleaning occurs. A story pole is moved about the aircraft outer surface edges to measure the height of the track above the aircraft as well as to determine the position of the track on the aircraft upper surface. The track usually is about 2 feet or so from the wing edges. After this information is determined, the safety track is constructed and attached to the supporting frame. A roller guide is attached to the track with a rope therefrom which is further attached to a rope adjuster. This is attached to the maintenance person who would be wearing a harness.

Abstract: The present invention is an apparatus for the synthesis and growth of single crystals of phosphorus compounds starting with the elemental materials in a single furnace without external exposure. The apparatus of the present invention is a crystal growth furnace heated by RF coils. Inside the furnace is a susceptor heated by a lower coil device for holding a crucible. Above the crucible is selectively positioned a phosphorus improved injector. The improved injector is further surrounded by a susceptor which is heated by an upper coil device. The non-phosphorus materials are placed in the crucible and melted to a desired temperature. The phosphorus material previously placed within the injector is heated by the radiant heat from both crucible and the upper susceptor to drive the phosphorus vapor into the melt through a tube. This is closely controlled by noting the temperature within the injector and adjusting the height of the injector above the melt to control the temperature within the phosphorus material.

Abstract: A semiconductor on fiber optic substrate is composed of a thin layer of electronic grade semiconductor material which is bonded to a substrate which is a fiber optic plate. The fiber optic plate acts as a continuous sheet of optical waveguides to transport light between semiconductor layers with high efficiency and with little defocusing. Integrated circuits are constructed on the semiconductor layer. Chips of this combination can then be stacked and optically interconnected via the optical fibers compromising the fiber optic plate using light emitting and light receiving devices mounted on said semiconductor layers.

Abstract: The present invention is a beam scanner for use about a nonlinear optical crystal for frequency conversion. The scanner oscillates the high power laser beam passing through the crystal to reduce heat damage and does not change the direction or the position of the beam upon exiting the scanner. A pair of thick optical plates are affixed to a driven axle being parallel to the laser beam direction. The first plate is mounted at a given angle to the axle and the second plate is mounted at the same but negative angle to the axle so that they are mirror images about the crystal. As the axle rotates, the laser beam moves through the crystal in a cylindrical pattern and due to the manner of mounting the plates, the exiting laser beam is not displaced from the original beam direction or position. The beam scanner may be inserted into an existing optical resonator, for example, without modifications thereto.

Abstract: A spatial light modulator has a plurality of pairs of input and reference images recorded upon a plurality of sub-areas thereof. Each sub-area is illuminated with an associated point source of light which is produced by illuminating a diffraction grating with coherent light. A Fourier transform lens produces a joint transform of each pair of input and reference images which can be detected by a CCD camera.

Abstract: A system for preparing oriented block copolymer structures includes a copolymer solution, a device capable of providing a flow field and an evaporation device. The device can be at least two cylinders that are parallel and adjacent to one another to form a nip and a driving mechanism to rotate each cylinder. Means for controlling a solvent environment and evaporation are provided.

Abstract: The present invention is a humidity sensor which can be used in a radiosonde. The humidity sensor includes a heat sink attached to the radiosonde, a Peltier cooler attached to the heat sink, a carbon element with a thermistor attached therein or thereon, and a control means. The resistance of the carbon element is adjusted to a predetermined level to maintain a relative humidity of about 33, in particular. The control means monitors this resistance and adjusts the Peltier cooler accordingly. The thermistor responding to the temperature of the carbon element outputs a resistance indicative of the temperature on the sensor surface.

Abstract: Limiting quadratic processing and compansion in photorefractive two beam coupling is disclosed. Two-beam coupling in photorefractive barium titanate employs the imaged intensity of the signal to amplify the reference beam while maintaining the phase of the reference beam. The phase distorted signal beam is converted to that of the controlled phase of the reference beam. The high pump limit of amplification in this two-beam coupling device produces an amplitude compressed output to reduce multiplicative noise. Lost contrast of the image is thereafter restored. Beam clean-up of a non-intelligence bearing beam can be carried out by a similar process; a low pass filter consisting of a pinhole plate can be used in place of the second photorefractive crystal in the Fourier plane and only the planar wavefront portion will pass through the pinhole and may be collimated by a lens to provide a cleaned planar output beam.