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| Number | Title | Issue Date |
| 4868768 | Optical absorption measurement system The system of the present invention contemplates a non-intrusive method for measuring the temperature rise of optical elements under high laser power optical loading to determine the absorption coefficient. The method comprises irradiating the optical ele... | 09/19/1989 |
| 4827479 | Density gradient free electron collisionally excited X-ray laser An operational X-ray laser (30) is provided that amplifies 3p-3s transition X-ray radiation along an approximately linear path. The X-ray laser (30) is driven by a high power optical laser. The driving line focused optical laser beam (32) illuminates a fr... | 05/02/1989 |
| 4800540 | Discriminating ultrasonic proximity detection system This invention uses an ultrasonic transmitter and receiver and a microprocessor to detect the presence of an object. In the reset mode the invention uses a plurality of echoes from each ultrasonic burst to create a reference table of the echo-burst-signat... | 01/24/1989 |
| 4799233 | Flashlamp radiation recycling for enhanced pumping efficiency and reduced thermal load A method for recycling laser flashlamp radiation in selected wavelength ranges to decrease thermal loading of the solid state laser matrix while substantially maintaining the pumping efficiency of the flashlamp.... | 01/17/1989 |
| 4772056 | Static latching arrangement and method A latching assembly for use in latching a cable to and unlatching it from a given object in order to move an object from one location to another is disclosed herein. This assembly includes a weighted sphere mounted to one end of a cable so as to rotate ab... | 09/20/1988 |
| 4727551 | Wiggler plane focusing in a linear free electron laser Free electron laser apparatus that provides a magnetic centering force to turn or focus a non-axial electron toward the longitudinal axis as desired. The focusing effect is provided by wiggler magnet pole faces that are approximately parabolically shaped.... | 02/23/1988 |
| 4726660 | Technique for compressing light intensity ranges utilizing a specifically designed liquid crystal notch filter A pin hole camera assembly for use in viewing an object having a relatively large light intensity range, for example a crucible containing molten metal in an atomic vapor laser isotope separation (AVLIS) system is disclosed herein. The assembly includes m... | 02/23/1988 |
| 4717627 | Dynamic high pressure process for fabricating superconducting and permanent magnetic materials Shock wave formation of thin layers of materials with improved superconducting and permanent magnetic properties and improved microstructures.... | 01/05/1988 |
| 4706542 | Low voltage arc formation in railguns A low voltage plasma arc is first established across the rails behind the projectile by switching a low voltage high current source across the rails to establish a plasma arc by vaporizing a fuse mounted on the back of the projectile, maintaining the volt... | 11/17/1987 |
| 4705349 | Optical switch An optical switching device (10) is provided whereby light from a first glass fiber (16) or a second glass fiber (14) may be selectively transmitted into a third glass fiber (18). Each glass fiber is provided with a focusing and collimating lens system (2... | 11/10/1987 |
| 4697100 | Deuterated L-arginine phosphate monohydrate The new crystal deuterated l-arginine phosphate monohydrate provides an excellent frequency conversion crystal for laser applications, especially in the one micron wavelength region.... | 09/29/1987 |
| 4674320 | Chemoresistive gas sensor A chemoresistive gas sensor is provided which has improved sensitivity. A layer of organic semiconductor is disposed between two electrodes which, in turn, are connected to a voltage source. High conductivity material is dispersed within the layer of orga... | 06/23/1987 |
| 4667161 | Pulse shaping with transmission lines A method and apparatus for forming shaped voltage pulses uses passive reflection from a transmission line with nonuniform impedance. The impedance of the reflecting line varies with length in accordance with the desired pulse shape. A high voltage input p... | 05/19/1987 |
| 4667101 | Predicting threshold and location of laser damage on optical surfaces An apparatus useful in the prediction of the damage threshold of various optical devices, the location of weak spots on such devices and the location, identification, and elimination of optical surface impurities comprising, a focused and pulsed laser, an... | 05/19/1987 |
| 4667107 | Ultrafast neutron detector The invention comprises a neutron detector (50) of very high temporal resolution that is particularly well suited for measuring the fusion reaction neutrons produced by laser-driven inertial confinement fusion targets. The detector comprises a biased two-... | 05/19/1987 |
| 4660203 | Soft X-ray laser using pumping of 3P and 4P levels of He-like and H-like ions X-ray laser method and apparatus for producing coherent radiation at, for example, energies of at least 40 eV, using Be-like Cr, N-like Ni, He-like Na, B-like Cr, Be-like Mn or similar multiply ionized species to pump appropriate high energy transitions i... | 04/21/1987 |
| 4648950 | CR-39 track etching and blow-up method This invention is a method of etching tracks in CR-39 foil to obtain uniformly sized tracks. The invention comprises a step of electrochemically etching the foil at a low frequency and a "blow-up" step of electrochemically etching the foil at a high frequ... | 03/10/1987 |
| 4649544 | Electro-optic harmonic conversion to switch a laser beam out of a cavity The invention is a switch to permit a laser beam to escape a laser cavity through the use of an externally applied electric field across a harmonic conversion crystal. Amplification takes place in the laser cavity, and then the laser beam is switched out ... | 03/10/1987 |
| 4646027 | Electron beam accelerator with magnetic pulse compression and accelerator switching An electron beam accelerator comprising an electron beam generator-injector to produce a focused beam of ࣙ0.1 MeV energy electrons; a plurality of substantially identical, aligned accelerator modules to sequentially receive and increase the kinetic ener... | 02/24/1987 |
| 4641087 | Phase comparator apparatus and method The phase change to be measured is multiply measured at artificially incred and decreased values and then averaged to result in greater accuracy. Delayed versions of the reference and input signals are compared in dual channels to the undelayed input sig... | 02/03/1987 |
| 4639887 | Bifurcated method and apparatus for floating point addition with decreased latency time Apparatus for decreasing the latency time associated with floating point addition and subtraction in a computer, using a novel bifurcated, pre-normalization/post-normalization approach that distinguishes between differences of floating point exponents.... | 01/27/1987 |
| 4626791 | Microwave detector A microwave detector (10) is provided for measuring the envelope shape of a microwave pulse comprised of high-frequency oscillations. A biased ferrite (26, 28) produces a magnetization field flux that links a B-dot loop (16, 20). The magnetic field of the... | 12/02/1986 |
| 4615588 | Transparent electrode for optical switch A low pressure gas electrode utilizing ionized gas in a glow discharge regime forms a transparent electrode for electro-optical switches. The transparent electrode comprises a low pressure gas region on both sides of the crystal. When the gas is ionized, ... | 10/07/1986 |
| 4599725 | Raman laser with controllable suppression of parasitics Method and apparatus for switching energy out of a Raman laser optical cavity. Coherent radiation at both the pump and first Stokes wave frequencies are introduced into the optical cavity from the same direction, and a second Stokes wave is utilized to sw... | 07/08/1986 |
| 4592082 | Quantitative determination of mineral composition by powder X-ray diffraction An external standard intensity ratio method is used for quantitatively determining mineralogic compositions of samples by x-ray diffraction. The method uses ratios of x-ray intensity peaks from a single run. Constants are previously determined for each mi... | 05/27/1986 |
| 4589113 | Short wavelength laser A short wavelength laser (28) is provided that is driven by conventional-laser pulses (30, 31). A multiplicity of panels (32), mounted on substrates (34), are supported in two separated and alternately staggered facing and parallel arrays disposed along a... | 05/13/1986 |
| 4586118 | Capacitor charging FET switcher with controller to adjust pulse width A switching power supply includes an FET full bridge, a controller to drive the FETs, a programmable controller to dynamically control final output current by adjusting pulse width, and a variety of protective systems, including an overcurrent latch for c... | 04/29/1986 |
| 4585736 | Flow cytometric measurement of total DNA and incorporated halodeoxyuridine A method for the simultaneous flow cytometric measurement of the total DNA content and the level of DNA synthesis in normal and malignant cells is disclosed. The sensitivity of the method allows a study of cell cycle traverse rates for large scale cell po... | 04/29/1986 |
| 4553078 | Servo control booster system for minimizing following error A closed-loop feedback-controlled servo system is disclosed which reduces command-to-response error to the system's position feedback resolution least increment, ƊSR, on a continuous real-time basis for all operating speeds. The servo system e... | 11/12/1985 |
| 4549155 | Permanent magnet multipole with adjustable strength Two or more magnetically soft pole pieces are symmetrically positioned along a longitudinal axis to provide a magnetic field within a space defined by the pole pieces. Two or more permanent magnets are mounted to an external magnetically-soft cylindrical ... | 10/22/1985 |
| 4549144 | Reflex ring laser amplifier system A laser pulse is injected into an unstable ring resonator-amplifier structure. Inside this resonator the laser pulse is amplified, spatially filtered and magnified. The laser pulse is recirculated in the resonator, being amplified, filtered and magnified ... | 10/22/1985 |
| 4538274 | Q-Switched Raman laser system Method and apparatus for use of a Raman or Brillouin switch together with a conventional laser and a saturable absorber that is rapidly bleached at a predetermined frequency .nu.=.nu.0, to ultimately produce a Raman or Brillouin pulse at freque... | 08/27/1985 |
| 4510402 | Optical harmonic generator A pair of uniaxial birefringent crystal elements are fixed together to form a serially arranged, integral assembly which, alternatively, provides either a linearly or elliptically polarized second-harmonic output wave or a linearly polarized third-harmoni... | 04/09/1985 |
| 4507589 | Low pressure spark gap triggered by an ion diode Spark gap apparatus for use as an electric switch operating at high voltage, high current and high repetition rate. Mounted inside a housing are an anode, cathode and ion plate. An ionizable fluid is pumped through the chamber of the housing. A pulse of c... | 03/26/1985 |
| 4504953 | Apparatus for generating coherent infrared energy of selected wavelength A tunable source (11) of coherent infrared energy includes a heat pipe (12) having an intermediate region (24) at which cesium (22) is heated to vaporizing temperature and end regions (27, 28) at which the vapor is condensed and returned to the intermedia... | 03/12/1985 |
| 4455277 | Electron beam magnetic switch for a plurality of free electron lasers Apparatus for forming and utilizing a sequence of electron beam segments, each of the same temporal length (substantially 15 nsec), with consecutive beams being separated by a constant time interval of the order of 3 nsec. The beam sequence is used for si... | 06/19/1984 |
| 4436796 | All-solid electrodes with mixed conductor matrix Alkali metal based electrochemical cells offer a great deal of promise for applications in many areas such as electric vehicles and load leveling purposes in stationary power plants. Lithium is an attractive candidate as the electroactive species in such ... | 03/13/1984 |
| 4409643 | Long lifetime, low intensity light source for use in nighttime viewing of equipment maps and other writings A long-lifetime light source with sufficiently low intensity to be used for reading a map or other writing at nighttime, while not obscuring the user's normal night vision. This light source includes a diode electrically connected in series with a small p... | 10/11/1983 |
| 4404470 | Neutron streak camera Apparatus for improved sensitivity and time resolution of a neutron measurement. The detector is provided with an electrode assembly having a neutron sensitive cathode which emits relatively low energy secondary electrons. The neutron sensitive cathode ha... | 09/13/1983 |
| 4398211 | Solid state optical microscope A solid state optical microscope wherein wide-field and high-resolution images of an object are produced at a rapid rate by utilizing conventional optics with a charge-coupled photodiode array. A galvanometer scanning mirror, for scanning in one of two or... | 08/09/1983 |
