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"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 4381564 | Waveguide laser having a capacitively coupled discharge A waveguide laser having a gain medium excited by a capacitively coupled self-sustained discharge is disclosed. The gain medium is disposed within a dielectric waveguide having a capillary bore centrally located therein. A gain medium such as a rare gas h... | 04/26/1983 |
| 4370540 | Reflective beam rotator An apparatus adapted for rotating a beam of radiation to obtain azimuthal and radial time averaging of the intensity distribution incident onto a workpiece is disclosed. The apparatus includes a housing adapted for rotation about a centerline axis, an ent... | 01/25/1983 |
| 4295741 | Two-wavelength phase control system In accordance with the present invention, output beams from a plurality of optical amplifiers in an oscillator-amplifier optical configuration are phase matched utilizing a feedback system employing phase error signals generated by optically heterodyning ... | 10/20/1981 |
| 4271355 | Method for mitigating 2πN ambiguity in an adaptive optics control system A method of mitigating 2πN phase ambiguity in an adaptive optics control system is disclosed wherein the radiation sensed by a detector within a feedback loop is passed through an aperture having a variable diameter. The turn-on of the adaptive optics co... | 06/02/1981 |
| 4261636 | Apparatus for high frequency optical beam oscillation A mechanical scanning apparatus adapted for oscillating the focus zone of a beam of radiation having high power to modify and control the nature and extent of the interaction zone on a workpiece is disclosed. The apparatus includes a compound beam adapted... | 04/14/1981 |
| 4260958 | Apparatus and method for deposition of electrical power in an electric discharge laser An improved electrode configuration and method for the deposition of electrical power into an electric discharge laser having a gas path transversely disposed to an optical axis and the electric field is disclosed. The electrode configuration includes a c... | 04/07/1981 |
| 4256958 | Apparatus for monitoring the optical quality of a beam of radiation An apparatus for monitoring the optical quality of a beam of coherent radiation or of an image from an incoherent source is disclosed. The apparatus includes a disk capable of being rotated, a plurality of slit sets circumferentially disposed about the di... | 03/17/1981 |
| 4253739 | Thermally compensated mirror A mirror adapted for compensating thermal distortions resulting from the absorption of energy in a beam of radiation incident thereon is disclosed. Coolant channels disposed within the mirror proximate the reflective surface are adapted for passing coolan... | 03/03/1981 |
| 4249140 | Closed loop resonator feedback system A resonator feedback system is disclosed wherein the output from a resonator having adaptive optics is monitored by a detector within a feedback loop to provide electrical control signals to actuators attached to the adaptive optics to control the phase o... | 02/03/1981 |
| 4245156 | Apparatus for monitoring the optical quality of a beam radiation An improved apparatus for monitoring the optical quality of a beam of coherent radiation or an image from an incoherent source is disclosed. The apparatus includes a disk capable of being rotated and having a plurality of rings of slit sets radially dispo... | 01/13/1981 |
| 4230996 | Nozzle array for chemical lasers An improved nozzle array adapted for use in chemical lasers is disclosed. The sidewalls of the nozzle array include a restoring bar fixedly attached thereto adapted for elastically restoring plastic thermal deformation of the array. The nozzle array inclu... | 10/28/1980 |
| 4229079 | Electro-optic modulator with improved acousto-optic suppression, heat transfer and mechanical support An improved electro-optic moduator device is disclosed which provides strain-free mounting of an electro-optic crystal within a housing assembly and suppression of acousto-optic effects within the crystal. An acoustic matching liquid having an acoustic im... | 10/21/1980 |
| 4223202 | Apparatus and method for welding boat subassemblies utilizing laser radiation An apparatus for welding T-frame stiffeners circumferentially to the interior surface of a cylindrical shell at selected axial positions to fabricate reinforced hull sections suitable for boat construction is disclosed. The apparatus is adapted for provid... | 09/16/1980 |
| 4223201 | Laser welding apparatus for shipyard panel shops An automated welding facility for the fabrication of shell sections suitable for ship construction utilizing laser welding is disclosed. The facility includes a panel welding station which includes an optical system for providing radiation for automated t... | 09/16/1980 |
| 4221469 | Thermally stabilized mirror An optical mirror having coolant means for compensating thermal tilt of the reflective surface is disclosed. The optical mirror has a laminated structure formed of a plurality of plates including a faceplate, a second plate, a third plate, a substrate pla... | 09/09/1980 |
| 4215321 | Method for obtaining high beam quality in a gas dynamic laser An apparatus and method for minimizing gas density perturbation within an optical region of a gas dynamic laser to improve the optical quality of the output laser is disclosed. Gas disturbance generators disposed intermediate the throat region of the nozz... | 07/29/1980 |
| 4207746 | Cryopump A cryopump having a cryopanel adapted for being cooled by a first refrigerant and shielded from radiation incident thereon by shields adapted for being cooled with a second refrigerant is disclosed. The cryopanel and the radiation shield are fabricated wi... | 06/17/1980 |
| 4206429 | Gas dynamic mixing laser A high power gas dynamic mixing laser capable of having an energizing gas formed by an exothermic decomposition process is disclosed. The laser includes a housing having a reaction chamber in which an excitation gas is formed by thermal decomposition of a... | 06/03/1980 |
| 4188592 | Closed cycle chemical laser A closed cycle chemical laser adapted for continuous wave operation is disclosed. A first gas such as sulphur hexafluoride is decomposed by an electrical discharge means to provide at least some fluorine atoms which when combined with molecular hydrogen i... | 02/12/1980 |
| 4178078 | Aerodynamic window An apparatus adapted for providing an aerodynamic window having a cylindrical configuration with an annular cross section capable of enveloping annularly a cavity therein is disclosed. The apparatus includes an annular injector adapted for providing a flo... | 12/11/1979 |
| 4177435 | Optically pumped laser An optically pumped laser system having a configuration capable of efficiently coupling pumping radiation with a gain medium to provide an outlet beam having a wavelength in the ultraviolet and visible spectrum is disclosed. A gain medium including halide... | 12/04/1979 |
| 4176327 | Method for cavity dumping a Q-switched laser A method for cavity dumping a Q-switched laser having a gaseous gain medium to obtain submicrosecond output pulses, typically controllably variable between ten and three hundred nanoseconds at a high pulse repetition frequency typically up to at least twe... | 11/27/1979 |
| 4175834 | Laser mirror with coolant fluid transfer manifold A pressure balancing fluid transfer manifold for use with fluid cooled laser mirrors is disclosed. The manifold is adapted for connection to the inlet and outlet ports of a fluid cooled laser mirror and includes an interface fitting adapted for being fixe... | 11/27/1979 |
| 4174504 | Apparatus and method for cavity dumping a Q-switched laser A laser having a gaseous gain medium capable of continuous wave operation and including an etalon with a Stark active gas disposed therein, adapted for providing submicrosecond pulses is disclosed. A method of utilizing the Stark effect to tune rapidly an... | 11/13/1979 |
| 4171251 | Laser photochemical separation of hydrogen isotopes A method of separating isotopes of hydrogen utilizing isotopically selective photodissociation of organic acid is disclosed. Specifically acetic or formic acid containing compounds of deuterated and hydrogenated acid is irradiated by radiation having a wa... | 10/16/1979 |
| 4170405 | Resonator having coupled cavities with intercavity beam expansion elements A resonator is disclosed having a mode control cavity and a power extraction cavity capable of being independently optimized to produce a laser beam having high power and good optical quality in the far field. The mode control cavity is a positive branch ... | 10/09/1979 |
| 4164366 | Variable output coupled resonator A variable output resonator is disclosed having a mode control cavity and a power extraction cavity both capable of being independently optimized to produce a laser beam having high power and good optical quality in the far field. A cone having a conical ... | 08/14/1979 |
| 4158821 | Laser gain tube An improved laser gain tube for use in a differential laser gyro is disclosed. The gain tube comprises a housing having a cathode located therein with a pair of chambers located within the cathode, a pair of discharge tubes extending from anode regions on... | 06/19/1979 |
| 4152575 | Method of material processing utilizing an interrupted beam of continuous wave laser radiation A method of material processing, in particular welding, utilizing high frequency interruption of a continuous wave beam of radiation is disclosed. The pulses of laser radiation are generated at a pulse repetition rate more rapid than the thermal response ... | 05/01/1979 |
| 4152049 | Spatial filter having aerodynamic windows An improved spatial filter for operation with high power laser beams is provided wherein a first gas flow system and a second gas flow system cooperate to enclose a cavity therebetween capable of accommodating a filter having an aperture located therein f... | 05/01/1979 |
| 4135787 | Unstable ring resonator with cylindrical mirrors An unstable ring resonator capable of providing an output beam having high power and high optical quality is disclosed. The unstable ring resonator is formed with a first region capable of providing transverse mode discrimination, beam magnification and i... | 01/23/1979 |
| 4132000 | Apparatus and method for making gun targets An apparatus for the generation of rifle targets for load development and accuracy testing of scope assisted rifles is disclosed in which the rifle targets have sighting areas optimized for a particular scope. The apparatus comprises a base having a first... | 01/02/1979 |
| 4123651 | Apparatus and method for speckle tracking A laser radar system and method for tracking speckle generated by the interaction of a beam of coherent electromagnetic radiation with a target to enhance the signal to noise ratio of a return signal is disclosed. The radar system is formed with a transce... | 10/31/1978 |
| 4123150 | Stable resonators for radial flow lasers A stable resonator is disclosed capable of providing a laser beam having both high power and good optical quality from a large volume gain medium. The stable resonator is formed having an optical cavity defined at one end by an unstable resonator and at t... | 10/31/1978 |
| 4123149 | Unstable resonator having high magnification An unstable resonator having high magnification and capable of accommodating an active medium having high gain and small dimensions is disclosed. The unstable resonator, formed with a pair of coupled cavities, has a diffraction grating capable of providin... | 10/31/1978 |
| 4092882 | Water closet flange wrench and puller The invention is a water closet flange wrench and puller comprising a base element having alignment means on each end, and having a pair of line-up studs which are attached to the bottom surface of said base element and are slideable engageable with the r... | 06/06/1978 |
| 4092515 | Laser method of precision hole drilling A method for obtaining a hole in a workpiece essentially free of a recast layer and heat affected zone with laser radiation is disclosed. Pulses of laser radiation having durations comparable to the time required to vaporize workpiece material, typically ... | 05/30/1978 |
| 4078167 | Welding shield and plasma suppressor apparatus A welding device capable of providing a blanket of nonreactive gas to isolate atmospheric gases from a weld zone to prevent weld contamination and capable of providing a stream of suppression gas across the path of a welding beam to suppress the formation... | 03/07/1978 |
| 4074269 | Burglar alarm for use with an automatic garage door opener A burglar alarm generator is electrically connected to a conventional remote control automatic garage door opener to provide a visual and/or audible signal to deter potential burglars from the residence. The alarm generator (such as a siren or the like ca... | 02/14/1978 |
