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| Number | Title | Issue Date |
| 8411281 | Fabry-perot interferometer having an increased spectral band A Fabry-Perot interferometer includes a fixed mirror structure and a movable mirror structure. The fixed mirror structure has a fixed mirror in a spectral region. The movable mirror structure includes a membrane spaced from the fixed mirror structure. The membrane h... | 04/02/2013 |
| 8334984 | Single wafer fabrication process for wavelength dependent reflectance for linear optical serialization of accelerometers A plurality of Fabry-Perot interferometric sensors are optically coupled in series with each other to form an ordered optical series. Each Fabry-Perot interferometric sensor has a unique signalband and a passband. Each Fabry-Perot interferometric sensor has its uniq... | 12/18/2012 |
| 8199334 | Self-calibrated interrogation system for optical sensors An optical pressure sensor interrogation system is provided. The system includes a light source for providing an optical signal to an optical pressure sensor and an optical coupler for receiving a reflected signal from the optical pressure sensor. The optical couple... | 06/12/2012 |
| 8154734 | Optical interferometric sensor Embodiments of environmental stimulus sensors comprising multiple sources and detectors for interrogating one or more optically resonant cavities that are responsive to one or more environmental stimuli are disclosed. Such sensors have, among other advantages, impro... | 04/10/2012 |
| 8120782 | Processes for producing tunable optical cavities A tunable optical cavity can be tuned by relative movement between two reflection surfaces, such as by deforming elastomer spacers connected between mirrors or other light-reflective components that include the reflection surfaces. The optical cavity structure inclu... | 02/21/2012 |
| 8077326 | Human-readable, bi-state environmental sensors based on micro-mechanical membranes An environmental sensing device includes an interferometric modulator which permanently actuates, in a visually-detectable manner, in response to being exposed to a predetermined environmental threshold or condition. The device can include a reactive layer, coating,... | 12/13/2011 |
| 8040526 | Implanting optical cavity structures An implantable product includes an optical cavity structure with first and second parts, each of which can operate as an optical cavity. The first part includes a container with at least one opening through which bodily fluid can transfer between the container's int... | 10/18/2011 |
| 8035822 | Optical sensor for extreme environments An optical sensing probe includes a tube having a tip portion configured for placement in an environment in which conditions are to be sensed and an etalon having a known characteristic disposed proximate the tip portion. The tube also includes a head portion remote... | 10/11/2011 |
| 8027042 | Multiple beam source for a multi-beam interferometer and multi-beam interferometer A multi-beam interferometer, typically for use in Optical Coherence Tomography, comprising a multiple beam source, the source being arranged so as to provide, in use, a plurality of beams of light for use in the interferometer, the source comprising: a light source ... | 09/27/2011 |
| 7990544 | Microcontroller-based imaging system utilizing a CMOS image sensor array Described herein is a an optical sensing unit, the optical sensing unit including a one-dimensional array of sensor locations, each sensor location being responsive to an incident optical signal to generate a local analog intensity value representative of the intens... | 08/02/2011 |
| 7961335 | Variable spectroscopy device Desired spectral characteristics are attained by making reflection films close enough. A variable spectroscopy device (1) has a pair of optical substrates (2, 3) opposing each other with an interval therebetween, two reflection films (5) opposin... | 06/14/2011 |
| 7948639 | Phase-shifting interferometry in the presence of vibration A phase-shifting interferometry (PSI) method and corresponding system including: (i) recording an interferogram for each phase in a sequence of phases between test light reflected from a test surface and reference light reflected from a reference surface, the test a... | 05/24/2011 |
| 7940400 | Method and apparatus for continuous readout of fabry-perot fiber optic sensor A pressure measurement system and method are described. The system uses a tunable laser and a Fabry-Perot sensor with integrated transducer. A detector senses the light modulated by the Fabry-Perot sensor. A signal conditioner, which can be located up to 15 km away,... | 05/10/2011 |
| 7936463 | Containing analyte in optical cavity structures A device can include both a photosensing component and an optical cavity structure, with the optical cavity structure including a part that can operate as an optical cavity in response to input light, providing laterally varying output light. For example, the optica... | 05/03/2011 |
| 7852490 | Implanting optical cavity structures An implantable product includes an optical cavity structure with first and second parts, each of which can operate as an optical cavity. The first part includes a container with at least one opening through which bodily fluid can transfer between the container's int... | 12/14/2010 |
| 7852491 | Human-readable, bi-state environmental sensors based on micro-mechanical membranes An environmental sensing device includes an interferometric modulator which permanently actuates, in a visually-detectable manner, in response to being exposed to a predetermined environmental threshold or condition. The device can include a reactive layer, coating,... | 12/14/2010 |
| 7800764 | Method and apparatus for reducing fringe interference of light A method for reducing fringe interference of light created in a passive cavity defined by partially reflecting optical surfaces, wherein the optical path length of the cavity is varied with a Gaussian distribution, where the standard deviation is at least one-quarte... | 09/21/2010 |
| 7800763 | High precision measurement of the free spectral range of an etalon Methods, systems, apparatus and devices for using a modified PDH technique to measure the FSR of an etalon with one part per 104 precision. An embodiment of the method for measuring the free spectral range of an etalon can include generating a laser light... | 09/21/2010 |
| 7796275 | Phase-shifting interferometry in the presence of vibration using phase bias A phase-shifting interferometry (PSI) method and corresponding system including: (i) recording an interferogram for each phase in a sequence of phases between test light reflected from a test surface and reference light reflected from a reference surface, the test a... | 09/14/2010 |
| 7787130 | Human-readable, bi-state environmental sensors based on micro-mechanical membranes An environmental sensing device includes an interferometric modulator which permanently actuates, in a visually-detectable manner, in response to being exposed to a predetermined environmental threshold or condition. The device can include a reactive layer, coating,... | 08/31/2010 |
| 7782469 | Method for determining optimal resonant length to maximize wave intensity in resonant structure Provided is a method for determining the optimal resonant length, among a large number of local resonant lengths which satisfy a resonant condition, that maximizes wave intensity in a resonant structure. In the second harmonic generation or the cascaded difference f... | 08/24/2010 |
| 7746480 | Apparatus for characterizing fiber Bragg gratings An apparatus characterizes at least one fiber Bragg grating. The apparatus includes a laser pulse source, an optical spectrum analyzer, and multiple optical paths. A first optical path includes a pulse stretcher and an attenuator. A second optical path optically cou... | 06/29/2010 |
| 7710581 | Wavelength monitoring method and apparatus and method of making same A wavelength of an optical source is monitored by first and second adjacent detectors on a common base. A bulk reflective component has first and second partially reflective surfaces that respectively direct first and second portions of energy from the source to the... | 05/04/2010 |
| 7701590 | Apparatus, methods, devices, and systems in which differences and/or changes in photosensed positions and/or quantities relate to shifts and/or differences in photon energies Response to light with laterally varying photon energy distribution is based on position, such as position on a detector of a respective light spot or intensity maximum for a wavelength or photon energy subrange. A layered structure such as a coating over the detect... | 04/20/2010 |
| 7684051 | Fiber optic seismic sensor based on MEMS cantilever A dual cantilevered beam structure is attached to a silicon frame. An optical fiber extends from a borosilicate wafer bonded to the bottom of the frame. A second borosilicate wafer is bonded to the top of the frame. The bottom borosilicate wafer is bonded to the opt... | 03/23/2010 |
| 7679755 | Tunable Michelson and Mach-Zehnder interferometers modified with Gires-Tournois interferometers Optical filters tunable for both center wavelength and bandwidth, having applications such as in astronomy, remote sensing, laser spectroscopy, and other laser-based sensing applications, using Michelson interferometers or Mach-Zehnder interferometers modified with ... | 03/16/2010 |
| 7667853 | Quantum bit reading device and method An apparatus includes a material in a resonator and containing systems, each of the systems having five energy states, a unit generating first and second pulse that resonate in a second transition and a third transition, respectively, a unit controlling the first an... | 02/23/2010 |
| 7643156 | Sensor, multichannel sensor, sensing apparatus, and sensing method A new and novel sensor having a simple structure with high detection sensitivity. The sensor (S1) includes the following from measuring light (L1) input side in the order listed below: a first reflector (10) having semi-transmissive and semi-ref... | 01/05/2010 |
| 7633629 | Tuning optical cavities A tunable optical cavity can be tuned by relative movement between two reflection surfaces, such as by deforming elastomer spacers connected between mirrors or other light-reflective components that include the reflection surfaces. The optical cavity structure inclu... | 12/15/2009 |
| 7626707 | Dual cavity displacement sensor An optical displacement sensor is disclosed comprising a beam splitter having two optically coupled and mechanically coupled optically resonant cavities. The respective cavity lengths of the optically resonant cavities are functions of an environmental stimulus. By ... | 12/01/2009 |
| 7583390 | Accelerometer comprising an optically resonant cavity An accelerometer based on an optical displacement sensor is disclosed. An embodiment of the present invention directs a light beam toward an optically resonant cavity and detects both the reflected and transmitted optical beams that result from interaction with the ... | 09/01/2009 |
| 7554673 | Obtaining information about analytes using optical cavity output light While two or more analytes within an optical cavity move relative to an array of photosensing elements, the cavity provides output light that has a position/time varying intensity function that depends on optical characteristics of the analytes and on the relative m... | 06/30/2009 |
| 7554674 | Optical displacement sensor An optical displacement sensor for sensing an environmental stimulus is disclosed. The optical displacement sensor exhibits an optical design that has suppressed back reflection and improved alignment tolerance between its optical components. The sensor is based on ... | 06/30/2009 |
| 7545513 | Encoding optical cavity output light Output light from an optical cavity includes, for each of a set of modes, an intensity function. Analyte can be positioned in the cavity, and a mode's intensity function can be encoded to include information about an optical characteristic of an analyte. For example... | 06/09/2009 |
| 7522291 | Optical air data system At least one second beam of light from a first beam of light generated by a laser is directed into an atmosphere. Light therefrom scattered by molecules or aerosols in the atmosphere is collected by at least one telescope as at least one light signal, which together... | 04/21/2009 |
| 7518736 | Optical air data system At least one second beam of light from a first beam of light generated by a laser is directed into an atmosphere. Light therefrom scattered by molecules or aerosols in the atmosphere is collected by at least one telescope as at least one light signal, which together... | 04/14/2009 |
| 7508528 | Optical air data system At least one second beam of light from a first beam of light generated by a laser is directed into an atmosphere. Light therefrom scattered by molecules or aerosols in the atmosphere is collected by at least one telescope as at least one light signal, which together... | 03/24/2009 |
| 7505145 | Optical air data system At least one second beam of light from a first beam of light generated by a laser is directed into an atmosphere. Light therefrom scattered by molecules or aerosols in the atmosphere is collected by at least one telescope as at least one light signal, which together... | 03/17/2009 |
| 7502123 | Obtaining information from optical cavity output light Output light from an optical cavity includes, for each of a set of modes, an intensity function, and a mode's intensity function includes information, such as about an optical characteristic of an analyte or of a region. For example, the intensity function can inclu... | 03/10/2009 |
| 7499182 | Optical signal measurement system An optical signal measurement system provides a tunable optical filter. An unknown optical signal is scanned through the tunable optical filter. The wavelength and chromatic dispersion values of the unknown optical signal scanned through the tunable optical filter a... | 03/03/2009 |
