Class / Patent application number | Description | Number of patent applications / Date published |
356519000 | Having partially reflecting plates in series (e.g., Fabry-Perot type) | 34 |
20080204761 | POINTING DEVICE - There is provided a pointing device including a light source that provides incident light for illuminating a front surface of a substrate at a predetermined angle of incidence, the substrate having a rear surface as well as the front surface and being transparent to the wavelength of the incident light, a detector that detects the intensity of speckle light from the front and rear surfaces, the speckle light generated from the incident light, and legs that are in contact with the substrate and charge the front surface of the substrate through friction between the legs and the substrate. | 08-28-2008 |
20090109445 | Parallel Plate Arrangement and Method of Formation - A method for forming a structure comprising multiple parallel surfaces having a precise separation is disclosed. Precise separation and parallelism of the surfaces is achieved through the use of an adhesive mixture that comprises a plurality of spacers having a dimension substantially equal to the desired separation. | 04-30-2009 |
20090141286 | METHOD AND SYSTEM FOR SENSING LIGHT USING INTERFEROMETRIC ELEMENTS - Certain embodiments of the invention provide a light sensor comprising at least one interferometric element that absorbs light in at least one wavelength. The interferometric element comprises a first surface and a second surface substantially parallel to the first surface. The second surface is spaced a gap distance from the first surface in a direction substantially perpendicular to the first surface. The light wavelength absorbed is dependent on the gap distance. The interferometric element further comprises a temperature sensor. The temperature sensor is responsive to changes in temperature of at least a portion of the interferometric element due to absorption of light by the interferometric element. | 06-04-2009 |
20090296104 | 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 intensity of the optical signal at the sensor location, the sensing unit including a digital interface to deliver a local digital intensity value corresponding to the local analog intensity value, a first microcontroller function in communication with the digital interface for sequentially collecting local digital intensity values to form a group of digital intensity values corresponding to an intensity variation across the array over a predetermined sensing period, a second microcontroller function cooperating with the first microcontroller function to receive the group of digital intensity values for transfer to an output device. | 12-03-2009 |
20100053636 | 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 arranged to, in use, emit a beam of light; and a rattle plate comprising a first reflective surface and a second reflective surface facing one another, the second reflective surface being only partially reflective. | 03-04-2010 |
20100110447 | COMPACT GAS SENSOR USING HIGH REFLECTANCE TERAHERTZ MIRROR AND RELATED SYSTEM AND METHOD - A system and method includes a tunable light source and a gas cell configured to detect the presence of gases at terahertz frequencies. The light source is operable to emit a light signal at terahertz frequencies. The gas cell includes at least two high frequency mirrors adapted to reflect signals at terahertz frequencies. The gas cell is adapted to be tuned based on the frequency of the emitted light to obtain a Fabry-Perot resonance of the reflected light signal. A pair of detectors are operable to detect the original light signal and the light signal reflected through absorption paths in the gas cell. The system and method are operable to determine a presence and identity of a gas present in the gas cell. | 05-06-2010 |
20100128284 | 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 from the tip portion containing a light directing element for directing light beams at the etalon and receiving reflected light beams from the etalon wherein the received reflected light beams are used for determining an environmental condition proximate the tip portion. A method for measuring a thickness of the etalon may include directing a light beams at different frequencies at the etalon and receiving the light beams from the etalon. The method may also include identifying conditions of the respective light beams condition received from the etalon and then calculating a first thickness of the etalon responsive to the respective conditions and the known characteristic. | 05-27-2010 |
20100165356 | SEMICONDUCTOR OPTICAL ELEMENT - A semiconductor optical element has an active layer including quantum dots. The density of quantum dots in the resonator direction in a portion of the active layer in which the density of photons is relatively high is increased relative to the density of quantum dots in a portion of the active layer in which the density of photons is relatively low. | 07-01-2010 |
20100245840 | 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 coupler splits the reflected signal and provides a first portion of the reflected signal to a first optical detector. The system further includes a filter for receiving a second portion of the reflected signal and providing a filtered signal to a second optical detector and a processing circuitry configured to obtain pressure based on a division or a subtraction of light intensities of the first and the second optical detector output signals. The processing circuitry is further configured to provide a feedback signal to the light source to control a wavelength of the optical signal | 09-30-2010 |
20100277746 | METHOD AND SYSTEM FOR LATERAL SCANNING INTERFEROMETRY - The present invention provides method and system for lateral scanning interferometry (LSI), which utilizes a reflecting reference element having a tilted angle for generating a tilted optical plane formed by wavefronts of a reference light so that interferometric patterns are acquired according to interferometric lights directed through an objective lens or an array of micro objective lens for analysis while the surface parts of the object enters the coherent range formed by the wavefronts of the reference light during lateral movement and a maximum signal intensity with respect to the acquired interferometric patterns can be obtained while the surface profile of the object has a zero or near zero optical path difference (OPD) with respect to the plane of wavefronts. The present invention is capable of reducing time cost comparing to the conventional vertical scanning interferometric method while enabling the system to be utilized for in-line (in-situ) measurement. | 11-04-2010 |
20100309480 | OPTICAL TOMOGRAPHY - An optical tomography imaging a tomogram by using a coherent light by a backscattering light of a measured object and a reflected light of a reference mirror, which has supercontinuum light sources, an optical system having group velocity dispersion connected to the supercontinuum light source, an optical detection element detecting a coherent light by a backscattering light of the measured object and a reflected light of the reference mirror, a timing detection element detecting a timing of each wavelength component in an output light from the optical system having the group velocity dispersion, and a unit sampling a signal from the optical detector by using a timing signal from the timing detection element with a signal from the supercontinuum light source as a trigger, and detecting an optical tomogram signal imaging a tomogram, thereby acquiring an optical tomogram at a higher speed than a conventional SS-OCT. | 12-09-2010 |
20110007323 | Equal-Path Interferometer - An optical assembly for use in an interferometer is provided. The optical assembly includes first and second partially reflective surfaces positioned along an optical axis and oriented at different non-normal angles to the optical axis. The second partially reflective surface is configured to receive light transmitted through the first partially reflective surface along the optical path, transmit a portion of the received light to a test object to define measurement light for the interferometer and reflect another portion of the received light back towards the first partially reflective surface to define reference light for the interferometer. The reference light makes at least one round trip path between the second and first partially reflective surfaces. | 01-13-2011 |
20110019202 | Fabry-perot interferometer and manufacturing method of the same - A Fabry-Perot interferometer and a manufacturing method of the same are disclosed. The Fabry-Perot interferometer includes a first mirror structure and a second mirror structure opposed to each other with a gap therebetween. A first mirror and a first electrode of the first mirror structure are electrically insulated from each other, or, a second mirror and a second electrode of the second mirror structure are electrically insulated from each other. In a state of voltage application between the first and second electrode, a distance “dmi” between the first mirror and the second mirror is shorter than a distance “dei” between a first-electrode-inclusive-portion and a second-electrode-inclusive-portion. | 01-27-2011 |
20110043823 | OPTICAL FILTER AND METHOD FOR THE PRODUCTION OF THE SAME, AND DEVICE FOR THE EXAMINATION OF ELECTROMAGNETIC RADIATION - The invention relates to an optical filter and a method for its production, and to a device for the examination of the spectral and spatial distribution of an electromagnetic radiation irradiated from an object. The invention is based on the task of providing an optical filter of the above described type that is inexpensive to produce, which can be used to detect a plurality of wavelengths, in which, however, tuning of the DBR mirrors by means of displacement is not necessary. Furthermore, a method for the production of such a filter is provided. According to a first aspect of the present invention this task is solved by a method for the production of an optical filter array having two DBR mirrors, and a cavity present between the same, comprising cavity sections having a plurality of different heights, each forming one Fabry Perot filter element, characterized by the following steps: applying a first DBR mirror onto a substrate, forming of a layer comprised of a cavity material on the DBR mirror, wherein this layer is equipped with a plurality of cavity sections forming the filter elements by means of utilizing a nanoimprint method, and applying the second DBR mirror on the cavity material having a structuring that is defined by the different heights of the cavity sections. | 02-24-2011 |
20110051148 | Filtered ASE Swept Source for OCT Medical Imaging - An integrated swept wavelength optical source uses a filtered ASE signal with an optical amplifier and tracking filter. This source comprises a micro optical bench, a source for generating broadband light, a first tunable Fabry Perot filter, installed on the bench, for spectrally filtering the broadband light from the broadband source to generate a narrowband tunable signal, an amplifier, installed on the bench, for amplifying the tunable signal, and a second tunable Fabry Perot filter, installed on the bench, for spectrally filtering the amplified tunable signal from the amplifier. A self-tracking arrangement is also possible where a single tunable filter both generates the narrowband signal and spectrally filters the amplified signal. In some examples, two-stage amplification is provided. The use of a single bench implementation yields a low cost high performance system. For example, polarization control between components is no longer necessary. | 03-03-2011 |
20110170117 | TRANSDUCER SYSTEM | 07-14-2011 |
20110199617 | TUNABLE INTERFERENCE FILTER, LIGHT SENSOR AND ANALYTICAL INSTRUMENT - In a tunable interference filter according to the invention, a second substrate includes a light transmission hole and alight transmissive member provided within the light transmission hole, and the light transmission hole is formed in a tapered shape having a diameter dimension of an inner circumferential surface increasing from the first surface toward the second surface, and the light transmissive member has a light incident surface in parallel to the first reflection surface and the second reflection surface, a light exiting surface in parallel to the first reflection surface and the second reflection surface, and a tapered side surface having a diameter dimension increasing from the first surface toward the second surface, and the tapered side surface is in contact with the inner circumferential surface of the light transmission hole. | 08-18-2011 |
20110205551 | VARIABLE WAVELENGTH INTERFERENCE FILTER, OPTICAL SENSOR, AND ANALYTICAL INSTRUMENT - A variable wavelength interference filter includes: a first substrate having a light transmissive property; a second substrate opposed to and bonded to one surface of the first substrate; a first reflecting film disposed on the one surface of the first substrate; a second reflecting film disposed on a first surface of the second substrate opposed to the first substrate, and opposed to the first reflecting film via a gap; and a variable section adapted to vary the gap, wherein the second substrate includes a light transmission opening disposed at a position opposed to the first reflecting film, and penetrating through the second substrate from the first surface to the second surface on the opposite side, and a planar transmissive member opposed to the first substrate and adapted to close the light transmission opening. | 08-25-2011 |
20110279824 | ELECTRICALLY TUNABLE FABRY-PEROT INTERFEROMETER, AN INTERMEDIATE PRODUCT AN ELECTRODE ARRANGEMENT AND A METHOD FOR PRODUCING AN ELECTRICALLY TUNABLE FABRY-PEROT INTERFEROMETER - Electrically tunable Fabry-Perot interferometers which are produced with micromechanical (MEMS) technology. Producing interferometers with prior art processes includes costly and complicated production phases. Therefore, it has not been possible to apply interferometers in consumer mass products. According to the present solution, the Fabry-Perot cavity is made by removing a sacrificial layer ( | 11-17-2011 |
20120127482 | FABRY-PEROT INTERFEROMETER - 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 has a movable mirror in the spectral region and multiple springs arranged one inside the other around the spectral region. A spring constant of the inner spring is less than a spring constant of the outer spring. One of the fixed mirror structure and the membrane has multiple electrodes, and the other of the fixed mirror structure and the membrane has at least one electrode that is paired with the electrodes to form opposing electrode pairs arranged one inside the other around the spectral region. The number of the opposing electrode pairs is equal to the number of the springs. | 05-24-2012 |
20120162664 | ACTUATOR FOR MOVING A MICRO MECHANICAL ELEMENT - The present invention relates to an actuator for moving a rigid element, e.g. an optical element such as mirror ( | 06-28-2012 |
20130088724 | METHOD AND APPARATUS FOR THE INSPECTION OF SANDWICH STRUCTURES USING LASER-INDUCED RESONANT FREQUENCIES - A method for inspecting a sandwich structure may comprise determining a reference frequency, directing first and second laser beams onto the structure, collecting reflected light, processing it using an interferometer, acquiring a time-dependent signal for a predetermined duration greater than a period corresponding to the reference frequency, processing the time-dependent signal to produce a frequency-dependent signal, and comparing characteristics of the processed frequency-dependent signal to the reference frequency. A laser-ultrasonic apparatus configured to inspect sandwich structures may comprise first and second laser beams configured to generate acoustic energy in and illuminate a sandwich structure, respectively, an interferometer configured to receive reflected light and generate a time-dependent signal, detection electronics configured to process the time-dependent signal to produce a time-dependent electrical signal, and one or more processing units configured to convert the time-dependent electrical signal into a frequency-dependent signal and to compare characteristics thereof to characteristics of a reference frequency-dependent signal. | 04-11-2013 |
20130163005 | Optical Sensing Device - An optical sensing device with multiple photodiode elements and multi-cavity Fabry-Perot ambient light filter structure to detect and convert light signal with different wavelength spectrum into electrical signal. In one embodiment, the optical sensing device capable of sensing color information of ambient light or sunlight and provides blocking of infrared (IR) light within the wavelength ranging from 700 nm to 1100 nm. Preferably, the optical sensing device senses not just the ambient light brightness but also the fundamental red, green and blue color components of the ambient light. | 06-27-2013 |
20130329232 | Micromechanical tunable Fabry-Perot interferometer arrangement and a method for producing the same - The invention relates to controllable Fabry-Perot interferometers which are produced with micromechanical (MEMS) technology. The prior art interferometers have a temperature drift which causes inaccuracy and requirement for complicated packaging. According to the invention the interferometer arrangement has both an electrically tuneable interferometer and a reference interferometer on the same substrate. The temperature drift is measured with the reference interferometer and this information is used for compensating the measurement with the tuneable interferometer. The measurement accuracy and stability can thus be improved and requirements for packaging are lighter. | 12-12-2013 |
20130335748 | FABRY-PEROT INTERFEROMETER - A Fabry-Perot interferometer includes an input mirror and an output mirror arranged facing the input mirror via a gap. Each mirror includes a pair of high-refractive layers and a space layer arranged selectively between the high-refractive layers. At least one of an input-side bridge part and an output-side bridge part arranged crossing the gap, is movable as a membrane. Each bridge part includes a transmission portion and a periphery portion. Each transmission portions includes a mirror element in which the space layer is sandwiched by the pair of high-refractive layers. In a second direction perpendicular to the first direction, the mirror element of the input mirror has a width larger than seven times of a maximum wavelength of a transmission light output from the output mirror, and functions as a diffraction restriction mirror. | 12-19-2013 |
20140111811 | MICROMECHANICAL TUNABLE FABRY-PEROT INTERFEROMETER AND A METHOD FOR PRODUCING THE SAME - Electrically tunable Fabry-Perot interferometers produced with micro-optical electromechanical (MOEMS) technology. Micromechanical interferometers of the prior art require high control voltage, their production includes complicated production phases, and the forms of the movable mirrors are restricted to circular geometries. In the inventive solution, there is a gap in the movable mirror, whereby mirror layers opposite to the gap are connected with anchoring. The anchoring is such that the stiffness of the mirror is higher at the optical area than at the surrounding area. This way it is possible keep the optical area of the mirror flat even if the control electrodes extend to the optical area. Due to large electrodes, lower control voltages are required. | 04-24-2014 |
20140118749 | ACOUSTIC SIGNAL RECEIVING APPARATUS AND IMAGING APPARATUS - There is used an acoustic signal receiving apparatus including a wavelength-tunable light source for irradiating measurement light, a controller for controlling a wavelength of the measurement light, a Fabry-Perot probe having a first mirror on a side where the measurement light enters, a second mirror on a side where an elastic wave from an object enters, and a spacer film positioned between the first and second mirrors and deforms in response to the elastic wave, an array photosensor for detecting a reflected light amount of the measurement light by the Fabry-Perot probe, and a signal processor for acquiring an intensity of the incident elastic wave based on a change in the reflected light amount. The controller sweeps the wavelength of the measurement light, and the signal processor determines the wavelength based on the reflected light amount at each wavelength subjected to the sweep. | 05-01-2014 |
20140125993 | CAVITY ENHANCED LASER BASED GAS ANALYZER SYSTEMS AND METHODS - Cavity enhanced absorption spectroscopy systems and methods for detecting trace gases using a resonance optical cavity, which contains a gas mixture to be analyzed, and a laser coupled to the cavity by optical feedback. The cavity has any of a variety of configurations with two or more mirrors, including for example a linear cavity, a v-shaped cavity and a ring optical cavity. The cavity will have multiple cavity resonant modes, or a comb of frequencies spaced apart, as determined by the parameters of the cavity, including the length of the cavity, as is well known. Systems and methods herein also allow for optimization of the cavity modes excited during a scan and/or the repetition rate. | 05-08-2014 |
20140233039 | PHYSICAL/CHEMICAL SENSOR, PHYSICAL/CHEMICAL PHENOMENON SENSING DEVICE, AND METHOD FOR MANUFACTURING SAME - Present invention relate to a physical/chemical sensor and a physical/chemical phenomenon sensing device that can detect minute change of surface stress and can be reduced in size and arrayed and to provide a method for manufacturing the same | 08-21-2014 |
20140268174 | Integrated Apertured Micromirror and Applications Thereof - An integrated apertured micromirror is provided in which the micromirror is monolithically integrated with a micro-optical bench fabricated on a substrate using a lithographic and deep etching technique. The micromirror has an aperture therein and is oriented such that the micromirror is optically coupled to receive an incident beam having an optical axis in a plane of the substrate and to at least partially transmit the incident beam therethrough via the aperture. | 09-18-2014 |
20150029515 | LASER DEVICE - The invention relates to a laser device, comprising a laser configured to generate laser light and a laser control module configured to receive at least a portion of the laser light generated by the laser, to generate a control signal and to feed the control signal back to the laser for stabilizing the frequency, wherein the laser control module comprises a tunable frequency discriminating element which is preferably continuously frequency tunable, and where the laser control module is placed outside the laser cavity. | 01-29-2015 |
20150124263 | Fabry-Perot interferometer and a method for producing the same - The invention relates to a Fabry-Perot interferometer and a method for producing the same. More specifically, the invention relates to Fabry-Perot interferometers which are controllable with one or several actuators, such as piezoelectric, electrostrictive or flexoelectric actuators. In prior art technology there is a problem to achieve a sufficiently small and uniform gap between mirrors. In the present invention an intermediate structure ( | 05-07-2015 |
20160077235 | DISPLACEMENT MEASUREMENTS USING SIMULATED MULTI-WAVELENGTH LIGHT SOURCES - An embodiment of an apparatus for estimating a parameter includes a multi-wavelength electromagnetic source configured to emit electromagnetic radiation beams having multiple wavelengths at a fixed angle relative to an interferometer, the multi-wavelength source having a stabilizer configured to lock each beam to one of a plurality of discrete wavelength ranges. The apparatus also includes the interferometer, which has a fixed reference reflector and a moveable reflecting assembly coupled to a moveable mass, the mass configured to move in response to the parameter. The apparatus further includes a detector configured to detect an interference pattern generated by the interferometer for each beam, and a processor configured to combine the interference patterns and estimate the parameter based on the combined interference pattern. | 03-17-2016 |
20160252394 | DEVICE AND METHOD FOR OPTICAL MEASUREMENT OF A TARGET | 09-01-2016 |