| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073514260 | Optical sensor | 18 |
| 20090044625 | Method for controlling light - Provided is a method for controlling light, including retrieving accelerations along an X-axis, a Y-axis, and a Z-axis with a 3-axis accelerometer sensor; matching the retrieved accelerations with RGB values; and transforming the RGB values and displaying a color of the transformed RGB values. The 3-axis accelerometer sensor retrieves the accelerations Ax, Ay, and Az along the X-axis, the Y-axis, and the Z-axis and calculates a velocity Vi along the X-axis, the Y-axis, and the Z-axis using the accelerations Ax, Ay, and Az, with i denoting directions x, y, and z, Vi=Vio+Ait expressing a terminal velocity in the direction i, Vio denoting an initial velocity in the direction i, Ai denoting the acceleration in the direction i, and t denoting time, thereby allowing variation of brightness to be controlled in eight modes. | 02-19-2009 |
| 20090056447 | Fiber optic MEMS seismic sensor with mass supported by hinged beams - The present invention relates to an optic seismic MEMS sensor. More specifically, a proof mass is supported by a frame having supporting beams. The proof mass is positioned within the frame and has a hinged attachment to the beams. The proof mass has a sensor gap having a first reflector and a second reflector positioned at opposing ends of the sensor gap. An optical fiber injects light into the sensor gap and light is reflected to determine seismic movement of the proof mass with respect to the frame. Stops are provided for limiting the movement of the proof mass to minimize strain on the attachment of the beams and the proof mass. | 03-05-2009 |
| 20110283795 | System, Device And Method For Detecting Seismic Acceleration - A device for detecting seismic acceleration including a proof mass; a base for providing a sensor acceleration, relative to the proof mass, based on the seismic acceleration; an optical fibre portion operatively connected between the proof mass and the base for providing a fibre tension based on the sensor acceleration, a fibre Fabry-Perot interferometer (FFPI) in the optical fibre portion for providing an optical characteristic representative of the fibre tension, and a compensator for applying a compensating tension to the FFPI to compensate for a change of the optical characteristic due to a temperature change of the FFPI. | 11-24-2011 |
| 20100024551 | FIBER OPTIC LASER ACCELEROMETER - An accelerometer is provided for a fiber optic laser. Strain applied to the fiber optic laser results in an emission wavelength shift. The fiber optic laser is joined to a transducer and extends laterally across said transducer. Acceleration of the transducer in a predefined direction causes strain in said fiber optic laser. The transducer can have many possible designs. There is further provided a system for sensing acceleration which includes a pumping laser and a distributor joined to the fiber optic laser. Return signals from the fiber optic laser are provided to an interferometer and analysis circuitry. In the absence of a transducer, the system can operate as a strain sensor. | 02-04-2010 |
| 20120024062 | Low Cost Optical Accelerometer - An accelerometer assembly and its method of operation. The accelerometer assembly is designed to be very low cost and robust. This enables the accelerometer assembly to be used in traditionally inexpensive consumer products. The accelerometer assembly uses one or more molded elastomeric structures. Each of the elastomeric structures has a flexible neck section and a head section that is supported by the flexible neck section. The head section of the elastomeric structure is placed between a light source and a photodetector. The head section partially obscures the photodetector from the light source. As the elastomeric structure experiences acceleration forces, the neck section flexes and the head section moves. This varies the degree in which the head section obscures the photodetector. The amount of light detected by the photodetector, therefore, becomes a measure of changing acceleration forces. | 02-02-2012 |
| 20110219874 | FIBRE OPTIC ACCELEROMETER AND A METHOD OF MANUFACTURING A FIBRE OPTIC ACCELEROMETER - A tri-axis accelerometer for use in seismic surveying is provided. The accelerometer comprises at least three fibre optic accelerometer elements which have respective fibre sensor coils, and which are characteristic in that the fibre sensor coils are coiled about a common coiling axis and at least one of the accelerometer elements is a slant angle accelerometer element. A corresponding method of manufacturing a tri-axis fibre optic accelerometer is also disclosed. A fibre optic tri-axis accelerometer for sensing acceleration in three directions is also provided, which comprises a first, a second, and a third sensor base, each base including a first, a second, and a third fixed element, respectively, and a first, a second, and a third movable element, respectively, each pair of fixed and movable elements carrying a fibre sensing coil. The fibre sensing coils are all coiled around a common coiling axis and at least one of the movable elements is designed and mounted so as to be movable in a direction that is slanted with respect to the common coiling axis. | 09-15-2011 |
| 20100313658 | FIBER OPTIC PARTICLE MOTION SENSOR SYSTEM - A sensor apparatus combines an optical sensor in which acceleration, acoustic velocity, or displacement (vibration) causes a corresponding shift in the center wavelength of the sensor output, coupled to a high speed interferometric interrogator, through an unbalanced fiber interferometer. The unbalanced interferometer functions to translate optical wavelength shift into phase shift, which is easily demodulated by the interrogator. | 12-16-2010 |
| 20110126623 | OPTICAL DETECTION METHOD AND OPTICAL MEMS DETECTOR, AND METHOD FOR MAKING MEMS DETECTOR - The present invention discloses an optical MEMS detector, comprising: a substrate; at least one photo diode in a region within the substrate; an isolation wall above the substrate and surrounding the photo diode region; and at least one movable part having an opening for light to pass through and reach the photo diode, wherein when the at least one movable part is moved, an amount of light reaching the photo diode is changed. | 06-02-2011 |
| 20120198935 | TWIN SUB-WAVELENGTH GRATING OPTICAL SIGNAL PROCESSOR - The present disclosure relates generally to an optical signal processor. In one embodiment, the optical signal processor includes a first sub-wavelength grating having a first grating period and a second sub-wavelength grating having a second grating period that is different than the first grating period of the first sub-wavelength grating. | 08-09-2012 |
| 20090308158 | Optical Accelerometer - An optical accelerometer including a light source, a light detector and a flexible medium positioned between the light source and the light detector. The flexible medium has an opening through which the light beam from the light sources passes with the light beam being detected by the light detector. Movement by the flexible medium in response to acceleration or deceleration varies the intensity of the light beam detected by the light detector. | 12-17-2009 |
| 20080229825 | Accelerometers - A fibre optic accelerometer particularly intended for use with an interferometer using the compliant cylinder approach but further providing a seismic mass at the core of the cylinder resulting in improved sensitivity and rejection of out-of-axis inputs. | 09-25-2008 |
| 20110303008 | CANTILEVER BEAM STRUCTURAL RESONANT-TYPE INTEGRATED OPTICAL WAVEGUIDE ACCELEROMETER - A cantilever beam structural resonant-type integrated optical waveguide accelerometer, includes an input waveguide ( | 12-15-2011 |
| 20100313659 | SEISMIC STREAMER - There is provided a solid seismic streamer cable for use in seismic surveying in marine environments. The streamer is characterised by a buffer layer | 12-16-2010 |
| 20110088470 | METHOD USING ASYMMETRIC OPTICAL RESONANCES - A method utilizes an optical resonator that includes a reflective element and a spatial mode filter positioned relative to the reflective element such that light emitted from the spatial mode filter is reflected by the reflective element. The optical resonator has an optical resonance with a resonance lineshape that is asymmetric as a function of wavelength. | 04-21-2011 |
| 20120325001 | OPTICAL SENSOR SYSTEMS AND METHODS - Optical sensors and sensing methods are provided. A particular method includes applying light to a first end of an optical fiber. Light reflected by at least one of a first photonic crystal sensor coupled to a second end of the optical fiber and a second photonic crystal sensor coupled to the second end of the optical fiber is detected. The first photonic crystal sensor exhibits a first reflection spectrum that changes responsive a first sensed parameter and the second photonic crystal sensor exhibits a second reflection spectrum that changes responsive a second sensed parameter. A parameter value of at least one of the first sensed parameter and the second sensed parameter is determined based on the detected light. | 12-27-2012 |
| 073514270 | Frequency or phase shift | 3 |
| 20110277548 | FIBER OPTIC PARTICLE MOTION SENSOR AND MEASURING METHOD USING THE SENSOR - An optical sensor in which acceleration, acoustic velocity, or displacement (vibration) causes a corresponding shift in the center wavelength of the sensor output. The sensor can be coupled to a high-speed interferometric interrogator through an unbalanced fiber interferometer. The unbalanced interferometer functions to translate optical wavelength shift into phase shift, which is easily demodulated by the interrogator. A method of measuring acceleration uses the sensor. | 11-17-2011 |
| 20080271533 | METHOD OF MEASURING BOREHOLE GRAVITATIONAL ACCELERATION - A sensor adapted for measuring acceleration, the sensor including a light source for illuminating an optical cavity; the optical cavity oriented for receiving light from the source, the optical cavity comprising a quality factor greater than or equal to about 10,000; and a photodetector for measuring a resonant frequency of light emitted from the optical cavity. | 11-06-2008 |
| 20120216615 | METHOD OF MEASURING ACCELERATION USING A FIBER OPTIC PARTICLE MOTION SENSOR - A method of measuring acceleration using an optical sensor. In the optical sensor, acceleration, acoustic velocity, or displacement (vibration) causes a corresponding shift in the center wavelength of the sensor output. The sensor can be coupled to a high-speed interferometric interrogator through an unbalanced fiber interferometer. The unbalanced interferometer functions to translate optical wavelength shift into phase shift, which is easily demodulated by the interrogator. | 08-30-2012 |
