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| Number | Title | Issue Date |
| 6259089 | Integrated optics rotation sensor A gyroscope which utilizes light waves to sense motion in the plane of the substrate. The gyroscope has a primary optical waveguide which is adapted to pass light from a single light source through the primary optical waveguide in both directions. The lig... | 07/10/2001 |
| 6166815 | Constantly high sensitivity fiber optic interferometer sensor A fiber optic interferometric sensor (150) having constantly high sensitivity by use of two lasers (152, 154) that simultaneously output at first and second wavelengths. By judicious choice of the wavelengths, the optical path length difference between th... | 12/26/2000 |
| 6018390 | Integrated optics waveguide accelerometer with a proof mass adapted to exert force against the optical waveguide during acceleration A sensor, an optical accelerometer, which is sensitive enough for the measurement of nano-g's as well as thousands of g's. The sensor is created by an optical waveguide coil which is secured to a substrate. At one end of the waveguide coil, a mirror refle... | 01/25/2000 |
| 5750901 | Optical fiber apparatus and method for measuring geological strains A measurement optical fiber is placed into contact with a geological structure, and a reference optical fiber of about the same length is not contacted to the geological structure. An input beam of light is transmitted down the lengths of the measurement ... | 05/12/1998 |
| 5531116 | Apparatus and method for phase tomographic determination of fluid currents An array of acoustic signal sources and sensors are positioned in a fluid. Acoustic signals propagated through the medium are subjected to phase differences as they pass through fluid currents. An eikonal description of the acoustic waves propagating thro... | 07/02/1996 |
| 5469519 | Optical waveguide image transmission system and method An improved image transmission system which includes an elongate optical waveguide 15 having an input aperture 17 and an output aperture 19. Optical apparatus 11, 13 is provided for injecting a transform of an image into the waveguide. In a specific imple... | 11/21/1995 |
| 5361383 | Optical fiber having internal partial mirrors and interferometer using same An optical fiber disposed to partially internally reflect optical energy passing therethrough is disclosed herein. The optical fiber 10 of the present invention includes an internal partial mirror disposed to partially transmit and to partially reflect op... | 11/01/1994 |
| 5345522 | Reduced noise fiber optic towed array and method of using same A sensitive towed optical fiber sensor array 50, wherein the fiber sensors (60A-60N) are connected in parallel, and the optical fiber cable (34) is paid out from the towing ship at a velocity about equal to but opposite to the velocity of the towing ship.... | 09/06/1994 |
| 5291032 | Fiber optic evanescent wave fuel gauge and leak detector using eccentric core fibers An optical fiber evanescent wave fuel sensor, employing a light source with a wavelength selected to be at the strong infrared absorption lines of the fuel, typically hydrocarbons. The amount of light leaking from the optical fiber is an exponential funct... | 03/01/1994 |
| 5289266 | Noncontact, on-line determination of phosphate layer thickness and composition of a phosphate coated surface A nondestructive method and apparatus is disclosed for determining the thickness and composition of a zinc phosphate layer applied to a metal surface, such as sheet metal on an automotive assembly line. The phosphate layer is irradiated with infrared ligh... | 02/22/1994 |
| 5275635 | Coastal air wash system A system for washing the air in a coastal environment in which a volume of air moves from a land mass to a water mass. The system includes a plurality of fountains 12 mounted offshore which spray a volume of water into the path of the air flow. Water is s... | 01/04/1994 |
| 5270538 | System for accurately detecting changes in temperature and pressure A system adapted for attachment to a device that undergoes changes in temperature and pressure, and for detecting changes in temperature and pressure in the device comprises a mechanism for attaching the system to the device and an optic device that inclu... | 12/14/1993 |
| 5235179 | Evanescent wave liquid level sensor with density compensation An evanescent wave liquid level sensor for measuring the density-compensated level of a liquid in a container. The sensor employs an eccentric core optical fiber fully immersed in the liquid to be measured. Light is injected into one end of the fiber. Som... | 08/10/1993 |
| 5224188 | Eccentric core optical fiber An eccentric core optical fiber 10 having a cross-sectional area sufficiently large to afford ease of manipulation, yet deposed to operate in an evanescent mode, is disclosed herein. The inventive optical fiber 10 includes a fiber core 20 of a first index... | 06/29/1993 |
| 5222161 | Method and apparatus for compressing a light pulse This invention discloses a method and apparatus for shortening the length of a pulse of light. Generally, the method entails altering the index of refraction of an optical medium (14) through which the pulse of light is traveling at an area of the medium ... | 06/22/1993 |
| 5220180 | Fiber optic fuel and liquid gauge having an open rigid "J" shaped tube A fiber optic fuel or liquid level gauge is disclosed which determines the liquid level by measuring the amount of light loss due to evanescent transfer to the fuel or liquid. An optical fiber is supported in the fuel or liquid tank, with a first end adja... | 06/15/1993 |
| 5212583 | Adaptive optics using the electrooptic effect An adaptive electroopical lens system for use in optical data storage systems, optical phased arrays, laser or other optical projectors, and raster scanning devices, and the like. The invention provides an electrooptical means for scanning an optical beam... | 05/18/1993 |
| 5210779 | Apparatus and method for focusing hard X-rays A dislocation-free, composite-substance crystal having a lattice constant which decreases over the length of the crystal (38) convergently focuses beams of hard X-rays or gamma rays (11). A single-substance, dislocation-free crystal (34) collimates diffus... | 05/11/1993 |
| 5179028 | Antibody coated crystal chemical sensor A sensor for detecting the presence of a particular chemical by determining the absolute frequency shift in the oscillating frequency of an antibody-coated oscillator. Specific antibodies deposited on a high Q crystal oscillator detect the change in frequ... | 01/12/1993 |
| 5164608 | Plural wavelength fiber optic liquid level sensor for multiple liquids A fiber optic liquid level sensor for measuring the level of multiple immiscible liquids in a container (20). An end of an optical fiber (24) is immersed in the liquids in the container (20). Light is injected into the other end of the fiber. The ratio of... | 11/17/1992 |
| 5155792 | Low index of refraction optical fiber with tubular core and/or cladding An optical fiber having an index of refraction less than that conventionally available. The low index of refraction fiber 10 of the present invention includes a fiber core 20 of a first index of refraction. The fiber core 20 circumscribes a longitudinal a... | 10/13/1992 |
| 5118932 | Shaft rotation rate sensor with a diffraction grating producing a velocity-related beat frequency A shaft rotation rate sensor for turbine engines. A reflective radial grating on the surface of the turbine shaft is employed in conjunction with an electromagnetic wave source and beam combining elements to mix two beams of frequency f and f&#b1;Ɗf, whe... | 06/02/1992 |
| 5100230 | True ground speed sensor A speed sensor for a moving vehicle. A transmissive grating is used in conjunction with an electromagnetic wave source and beam combining waveguide to mix two beams of frequency f and f+Ɗf, where Ɗf is proportional to the speed of the grating relative t... | 03/31/1992 |
| 5099131 | Acquisition and testing of latent fingerprints using upconversion Latent fingerprints are detected by upconverting infrared radiation provided by a special dusting powder and digitally imaging the upconverted radiation. In accordance with the principles of the present invention, a real time image of latent fingerprints ... | 03/24/1992 |
| 5077482 | Liquid gauge having an optical fiber with flexible membrane enclosure A fiber optic fuel or liquid level gauge is disclosed which determines the liquid level by measuring the amount of light loss due to evanescent transfer to the fuel or liquid. An optical fiber is supported in the fuel or liquid tank, with a first end adja... | 12/31/1991 |
| 5058420 | Fiber optic liquid leak detector A precision liquid leak detector 10 free of mechanical moving parts is disclosed herein. The liquid leak detector 10 of the present invention is disposed to measure the rate of change of the volume of a liquid within a container 14. The leak detector 10 i... | 10/22/1991 |
| 5012499 | γ-ray detecting device using dislocation-free crystal A γ-ray detector that comprises a dislocation-free single crystal. Typical crystals include silicon and germanium, for example. The crystal is surrounded by an active shield that functions as an anticoincidence counter and a γ-ray detector is disposed a... | 04/30/1991 |
| 5004914 | Fiber-optic interferometric chemical sensor A fiber-optic interferometric chemical sensor for detecting chemical vapors in the air. The chemical sensor 10 includes a light source 12 which outputs an optical signal to a first beam splitter 14. The first beam splitter 14 splits the optical signal int... | 04/02/1991 |
| 4987582 | X-ray fluorescence imaging of elements A system for detecting the presence of known materials in a body or container. The system incorporates a gamma or X-ray source for irradiating the body with gamma rays to produce X-ray fluorescence of materials contained therein. A directionally discrimin... | 01/22/1991 |
