Abstract: A wedge-shaped microresonator is provided that can be mounted proximate one or more wedge-shaped electro-optic components in order to construct a densely packed microlaser assembly. The wedge-shaped microresonator has first, second and third side surfaces. The wedge-shaped microresonator includes a passive Q-switch proximate the second side surface and an active gain medium proximate portions of the first and third side surfaces. The wedge-shaped microresonator also includes a reflective surface proximate each of the first, second and third side surfaces. At least one of the reflective surfaces is partially reflective, however, to then permit emission of laser signals. In addition to the wedge-shaped microresonator, a microlaser assembly is provided that also includes at least one wedge-shaped electro-optic component for receiving and modifying the laser pulses emitted by the wedge-shaped microresonator.

Abstract: An electromechanical sensor produces an electrical signal in response to a change in a physical parameter being monitored by the sensor. An optical phase modulator is arranged such that electrical signals from the electromechanical sensor cause a phase change in optical signals propagating in the two legs of the interferometer. The phase change is obtained by forming the interferometer to have a phase modulator in each leg. Applying the electrical signal to the phase modulators, which are connected in push-pull, changes the optical path length difference between the interferometer legs and produces an optical signal that can be transmitted to a remote location. A photodetector at the remote location converts the optical signal into an electrical signal that can be processed to measure changes in the parameter. The sensors may be used singly, or a plurality of sensors may be arranged in a geophone array.

Abstract: The present invention is directed to an apparatus for supplying gas at a first pressure and at a second pressure. The apparatus includes a gas generating system having a gas generating system outlet. A flow switch is in communication with the gas generating system outlet and has an outlet thereof forming a gas outlet at the first pressure. A pressure regulator is in communication with the gas generating system outlet for regulating gas flowing to the gas outlet at the first pressure. A solenoid valve is electrically controlled by the flow switch and is in communication with the gas generating system outlet and has a solenoid valve outlet. A pressure intensifier is in communication with the solenoid valve for raising the pressure of the gas generated by the gas generating system for output to an outlet at a second pressure.

Abstract: Spurious pulses are eliminated in the output of a comparator performing analog to digital conversion by addition of logic which eliminates pulses having a width less than a selected width from the output of the comparator.

Abstract: The present invention allows an additional connection to a standard medical gas cylinder valve such as a CGA-870 valve. An additional connection may be used for filling a cylinder without removing the pressure reducer, simultaneous filling while drawing through the pressure reducer, or for any other purpose that requires an additional or non-standard connection to the cylinder. The additional connection will be through an adapter that screws into the burst disc port. Some gas cylinder valves have the burst disc center line closer to the outlet centerline. This close centerline may be accommodated by offsetting the access of the first and second port to provide clearances required.

Abstract: The present invention is directed to an integrally formed clip ring made out of a conductive resilient material such as beryllium copper. The clip ring is used for retaining a male member and a female member of an electrical connector and for forming a ground circuit between the male member and the female member of the electrical connector. The clip ring of the present invention fully engages the outside diameter of the male retaining groove and the inside diameter of the female retaining groove simultaneously. Advantageously, this eliminates the potential for discontinuities in a ground circuit in a vibrational environment. The clip ring includes an annular-shaped body having an inner wall and an outer wall where the outer wall has a plurality of circumferentially spaced slots. The outer wall has a first end circumferentially spaced from a second end wherein when the clip ring is compressed a first end and a second end are brought into contact with each other.

Abstract: The present invention is directed to an integrally formed clip ring made out of a conductive resilient material such as beryllium copper. The clip ring is used for retaining a male member and a female member of an electrical connector and for forming a ground circuit between the male member and the female member of the electrical connector. The clip ring of the present invention fully engages the outside diameter of the male retaining groove and the inside diameter of the female retaining groove simultaneously. Advantageously, this eliminates the potential for discontinuities in a ground circuit in a vibrational environment. The clip ring includes an annular-shaped body having an inner wall and an outer wall where the outer wall has a plurality of circumferentially spaced slots. The outer wall has a first end circumferentially spaced from a second end wherein when the clip ring is compressed a first end and a second end are brought into contact with each other.

Abstract: A software application is analyzed to identify its “core functionalities”, and object-oriented core objects containing no application-specific control behavior are created to perform these essential functions. The event traces in which the core objects participate are identified, and this control behavior is embodied in one or more “control objects”, which invoke the operation of various core objects as needed to execute a particular event trace. Because the core functionalities and control behaviors are separated, the core objects are application-independent, and can be re-used in other applications without modification by modifying their associated control objects to different application-specific event traces.

Abstract: An image intensifier tube includes a photocathode (20) with an active layer (52) providing an electrical spectral response to photons of light. The photocathode (20) also includes integral spacer structure (42) which extends toward and physically touches a microchannel plate (22) of the image intensifier tube in order to establish and maintain a desirably precise and fine-dimension spacing distance “G” between the photocathode and the microchannel plate. A method of making the photocathode and a method of making the image intensifier tube are described also.

Abstract: A pump light source provides pump light to an optical fiber arranged to guide the pump light to a first optical isolation device. Light output by the first optical isolation device is input to a wavelength division multiplexer. A gain fiber is connected to the wavelength division multiplexer and arranged to be optically pumped by the pump light such that the gain fiber emits broadband light that propagates to the wavelength division multiplexer. An output optical fiber is connected to the wavelength division multiplexer and arranged to guide a portion of the broadband light emitted by the gain fiber to a second optical isolation device for input to a fiber optic rotation sensor.

Abstract: An improved optical correlator using a coherent light beam employs a method of adaptive alignment. A test pattern modulates an input spatial light modulator. The modulated beam propagates through passive transforming optical elements to a filter spatial light modulator, which is simultaneously modulated with an independently transformed frequency domain reference. The resulting correlation or coincidence of the optically transformed pattern with the independently transformed reference is processed to yield a feedback signal indicative of any optical misalignment of the optical correlator. The feedback signal drives a beam deflector to compensate by adjusting the path of the coherent beam, thereby improving and maintaining optical alignment of the correlator.

Abstract: Disclosed is a luminaire including a housing for receiving light axially and having at lest one optical surface for emitting light. A lens is mounted in the housing and has a light input portion and a light output portion. A prismatic film is mounted in the housing onto which light output from the output portion of the lens is incident thereon wherein light is reflected by the prismatic film radially outwardly therefrom.

Abstract: The present invention relates to M-type microwave devices and is aimed to improve effectiveness of using a working surface of field-electron emitters, to improve their reliability while increasing stability of field emission and service life of the device. These objects are solved in the design of a M-type microwave device, comprising an anode encircling a cylindrical evacuated cavity and a cathode assembly disposed co-axially inside the anode, said cathode assembly comprising a cylindrical rod with its surfaces having elements in the form of planar (film) field-electron emitters and secondary-electron emitters that provide a primary and a secondary electron emission, respectively. In doing so, the normal to planar field-electron emitters is not parallel and makes therewith an angle of more than 0 degrees. An end-face of the field-electron emitter is protected by a tunnel-thin dielectric layer containing impurities of various materials and materials having a low work function.

Abstract: A dithered Coriolis acceleration sensor system has a proof mass that is free of feedback in the accelerometer servo loop at the dither frequency by totally notching out all feedback torque at this frequency. The proof mass relative motion is then a direct measure of the rate because there is no feedback torque to alter the proof mass response to the acceleration. The feedback modulation system according to the invention captures the Coriolis-sensor output such that the phase and gain of the signal generated from the sensor are of no concern in maintaining good scale factor.

Abstract: A distance judging system (S) includes at least two spaced apart marker devices (10) formed on a first object (12) and providing a signal (14). A viewer (A) is adapted to detect relative position of the signals (14) from the markers (10), and create an image (22) of the relative positions of the markers (10) within a field of view (16). A reticle (18) is superimposed on the field of view (16) of the viewer (A). The reticle (18) is selected to form a control area (20) within which simultaneous appearance of at least two images (22) of the markers (10) indicates that the first object (12) is at a distance (24) at least as great as a desired distance from the viewing apparatus (A); whereas, simultaneous appearance of less than two images (22) of the markers (10) within the control area (20) indicates that the first object (12) is at a distance (24) less than the desired distance.

Abstract: A low-power wide-bandwidth klystron comprises a cathode having an electron emitting surface capable of emitting an electron beam and a collector spaced from said cathode and designed to collect the electron beam emitted from the cathode. An anode is disposed between the cathode and the collector in order to channel the electron beam into a series of drift tubes that define the electron beam path between the anode and the collector. The drift tubes define gaps in which the input cavity and output cavity interact with the electron beam. The input cavity velocity modulates the electron beam by way of a radio frequency input signal and the output cavity extracts the amplified radio frequency signal from the electron beam. The drift tubes may define additional gaps between the input cavity and output cavity for intermediate cavities that would provide additional amplification.

Abstract: A system for modulating light is disclosed. The system comprises a detector (102) that receives input radiation (101) and generates detector data (104) representative of the input radiation (101). An information processor (106) receives the detector data (104) and generates control data (108). A filter (110) associated with the detector (102) receives the control data (108) and filters the radiation input into the detector (102) in response to the control data (108). A system for light modulation is disclosed. The system comprises a sensor (114) that receives input radiation (101) and generates detector data (104) representative of the input radiation (101). An information processor (106) receives and processes the detector data (104) and generates control data (108). A filter (110) receives the control data (108) and filters the radiation in response to the control data (108). A method for modulating light is disclosed.

Abstract: An optical waveguide is formed on a first side of an integrated optics substrate. The optical waveguide is included in a first arm of an interferometer that is arranged to produce an interference pattern. The integrated optics substrate is mounted and arranged such that acceleration of the integrated optics substrate along a selected axis produces a change in the interference pattern. Changes in the interference pattern are monitored and correlated with the acceleration.

Abstract: A collector structure comprises a heat sink having a cylindrical opening, a sleeve disposed within the cylindrical opening of the heat sink, and a collector core disposed within the sleeve. The sleeve is comprised of a material having a rate of thermal expansion different than that of the heat sink and is disposed in close contact with the heat sink when the collector is at an elevated operational temperature. A slight gap is defined between the collector core and the sleeve when the collector is at an ambient temperature, and the collector core is in close contact with the sleeve when the collector is at the operational temperature. The heat sink further comprises either copper or aluminum, the sleeve is comprised of molybdenum, and the collector core is comprised of a ceramic material. To manufacture the collector structure, the heat sink is heated to a temperature above the operational temperature and the sleeve is inserted into the cylindrical opening of the heat sink at the elevated temperature.

Abstract: The present invention comprises a method for detecting photons and generating a representation of an image. A photocathode receives photons from an image. A power supply to the photocathode is gated such that the photocathode is switched between an on state and an off state. The photocathode discharges electrons in response to the received photons while the photocathode is in the on state. A microchannel plate with an unfilmed input face and an output face receives the electrons from the photocathode and produces secondary emission electrons which are emitted from the output face. A screen receives the secondary electrons and displays a representation of the image.