| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 356454000 | Fabry-Perot type or Etalon Type | 39 |
| 20080273208 | Interference Filter - This invention relates to an interference filter, especially for use in gas detection with infrared light within a chosen range, comprising at least two essentially parallel and partially reflective surfaces with a chosen distance between them thus defining a cavity delimited by the reflecting surfaces between which the light may oscillate, and wherein at least one of said surfaces is partially transparent for transmission of light to or from said cavity. The filter comprises a first transparent material having a high refractive index, e.g. silicon, positioned in at least a part of said cavity, and at least one of said reflective surfaces being divided into a three dimensional pattern with varying shift relative to its plane, thus to provide a position dependent resonance condition between them for separation of different wavelengths in the light. | 11-06-2008 |
| 20090073450 | Apparatus and Methods Using Highly Optically Dispersive Media - Embodiments of the invention pertain to the optical phenomena of ‘slow-light’ and ‘fast-light’, provided by a highly optically dispersive medium; that is, one in which the absolute value of the group index of refraction of the medium is equal to or greater than four. Apparatus embodiments of the invention are directed to an optical spectroscopic parameter detection and/or measurement apparatus. In various non-limiting aspects, the apparatus may be in the form of an interferometer, a spectral interferometer, a spectrometer, a wavemeter, a tunable narrowband filter, and other such devices. Various non-limiting, exemplary apparatus may include a two-beam interferometer, a multiple-beam interferometer, a grating-based interferometer/spectrometer, a Fourier-Transform interferometer, and others. The embodied devices include a highly dispersive medium that appropriately can facilitate either a slow-light effect or a fast-light effect, which is disposed in a propagation path of an electromagnetic (EM) input field and, a detector disposed in a manner to detect an output field resulting from the input filed interaction with the highly dispersive medium. Method embodiments involve measuring a spectroscopic parameter with significantly enhanced bandwidth and/or sensitivity and/or resolving power and/or accuracy over currently available measurement techniques, using an embodied optical spectroscopic parameter detection and/or measurement apparatus that incorporates a highly dispersive medium. | 03-19-2009 |
| 20090073451 | Spectrally diverse, spatially sensitive apparatus and associated methods - A spectrometer for use with a desired wavelength range includes an array of filters. Each filter outputs at least two non-contiguous wavelength peaks within the desired wavelength range. The array of filters is spectrally diverse over the desired wavelength range, and each filter in the array of filters outputs a spectrum of a first resolution. An array of detectors has a detector for receiving an output of a corresponding filter. A processor receives signals from each detector, and outputs a reconstructed spectrum having a second resolution, the second resolution being higher than any of the first resolution of each filter. Filters and detectors may be arranged into a plurality of imaging units, each imaging unit including first and second filters and first and second photosensing regions. A processor receives signals from each imaging unit, and generates a reconstructed spatial image comprised of discrete spatial units corresponding to each imaging unit. | 03-19-2009 |
| 20090262359 | APPARATUS FOR OPTICAL FREQUENCY DOMAIN TOMOGRAPHY WITH ADJUSTING SYSTEM - In an apparatus for imaging of objects by applying optical frequency domain tomography and provided with an adjusting system for setting a relative position of photosensitive elements ( | 10-22-2009 |
| 20090316159 | SLAB WAVEGUIDE SPATIAL HETERODYNE SPECTROMETER ASSEMBLY - An optical broadband micro-spectrometer containing an input optical assembly, a group of slab waveguide spatial heterodyne spectrometer (SHS) integrated circuits (ICs), a detection module and a processor for multi-line detection. The input optical assembly applies an input light signal uniformly with respect to brightness and frequency to the apertures of the waveguides and may project a pupil image onto the SHS input face and may be a scanner. Each slab waveguide spatial heterodyne spectrometer (SHS) integrated circuit (IC) contains at least one slab waveguide SHS IC. The detection module bonds directly to the slab waveguide output apertures. Each slab waveguide SHS IC may contain one or more slab waveguide SHS. | 12-24-2009 |
| 20100079765 | METHOD FOR MEASURING A SPECTRUM OF A NARROWBAND LIGHT SOURCE, AND SPECTROMETER ARRANGEMENT - A spectrometer arrangement for measuring a spectrum of a light beam emitted by a narrowband light source, such as a bandwidth-narrowed laser, includes at least one etalon, a beam splitter for splitting the light beam into a first partial beam and a second partial beam, one or more optical directing elements for directing the first partial beam n times and the second partial beam (n+k) times through the at least one etalon, wherein n and k are integers ≧1. The spectrometer arrangement further has at least one light-sensitive detector and an evaluation device for evaluating the spectra—recorded by the at least one detector—of the first partial beam that has passed through the at least one etalon n times and of the second partial beam that has passed through the at least one etalon (n+k) times in order to determine the light spectrum corrected for the apparatus function of the at least one etalon. | 04-01-2010 |
| 20100097613 | SPECTROMETER AND A METHOD FOR CONTROLLING THE SPECTROMETER - The invention relates to a spectrometer for material analysis and to a control method for a spectrometer. The spectrometer includes a radiant source ( | 04-22-2010 |
| 20100110442 | Tandem Fabry-Perot Etalon Cylindrical Beam Volume Hologram for High Resolution/Large Spectral Range Diffuse Light Spectroscopy - Systems and methods for performing two-dimensional (2D) high resolution spectral-spatial mapping are described. At least one embodiment includes a spectrometer for performing two-dimensional (2D) high resolution spectral-spatial mapping comprising a Fabry-Perot component configured to receive a diffuse input beam and provide a high resolution spectral mapping of the diffuse input beam in a first direction. The spectrometer further comprises a volume hologram for increasing a spectral operating range, the volume hologram configured to perform spectral mapping in a second direction orthogonal to the first direction to increase the spectral operating range. The spectrometer further comprises a charged coupled device (CCD) configured to receive output beams, the output beams used to provide spectral analysis of the input beams. | 05-06-2010 |
| 20100110443 | PLANAR WAVEGUIDE WAVELENGTH DISPERSIVE DEVICES WITH MULTIPLE WAVEGUIDE INPUT APERTURE - A spectrometer has a multi-input aperture for admitting an input wavefront and an array of multiple waveguide structures terminating at the multi-input aperture. The input wavefront is incident on each of the waveguide structures, which provide a dispersive function for the input wavefront. Interferometers are formed by elements of the waveguide structures. The interferometers have different optical path length differences (OPDs). The interferometers provide a wavelength responsive output for spatially extended light sources. The output of the interferometers is detected with a detector array. The spectrometer has an improved etendue, and in some embodiments very high resolution. | 05-06-2010 |
| 20100182608 | IRREGULARLY SHAPED ACTUATOR FINGERS FOR A MICRO-ELECTROMECHANICAL SYSTEM FABRY-PEROT FILTER - According to one embodiment, a micro-electrical mechanical system apparatus includes (i) a comb drive actuator having at least one irregularly shaped finger and (ii) a movable Fabry-Perot filter cavity mirror coupled to the comb drive actuator. According to some embodiments, a relationship between a voltage applied to the comb drive actuator and an amount of displacement associated with the movable mirror is substantially linear. | 07-22-2010 |
| 20100220331 | Micro-electromechanical system fabry-perot filter cavity - According to some embodiments, a micro-electrical mechanical system apparatus includes an actuator within a plane and at least one movable mirror oriented substantially normal to the plane. The actuator may move the movable mirror with respect to a fixed mirror oriented substantially normal to the plane and substantially parallel to the movable mirror. The space between the fixed and movable mirrors might comprise, for example, a Fabry-Perot filter cavity for a spectrometer. | 09-02-2010 |
| 20100245832 | SPECTROMETER AND INTERFEROMETRIC METHOD - The invention relates to a spectrometer, a spectrometric method and detector, and a new use of an interferometer. The spectrometer comprises a Fabry-Perot interferometer ( | 09-30-2010 |
| 20110149292 | APPARATUS AND METHOD FOR ANALYZING OPTICAL CAVITY MODES - A system for analyzing optical cavity modes of at least one microcavity or at least one cluster of microcavities, comprises, an apparatus for sensing a change in the condition of or for analyzing the optical cavity modes by utilizing an optical interference of the optical cavity modes. | 06-23-2011 |
| 20110170108 | Fast Microscale Actuators for Probe Microscopy - A system for measuring a property of a sample includes an actuation device disposed on a substrate and includes a flexible surface spaced apart from the substrate and configured so as to allow placement of the sample thereupon. The actuation device also includes a vertical actuator that is configured to cause the flexible surface to achieve a predetermined displacement from the substrate when a corresponding potential is applied thereto. A sensing probe is disposed so as to be configured to interact with the sample thereby sensing the property of the sample. | 07-14-2011 |
| 20110194118 | WAVELENGTH VARIABLE INTERFERENCE FILTER, OPTICAL SENSOR, ANALYZER AND PROCESS FOR PRODUCING WAVELENGTH VARIABLE INTERFERENCE FILTER - A wavelength variable interference filter includes: a first substrate which has a light transmissive property; a second substrate which has a light transmissive property and is disposed to face one surface of the first substrate and is bonded thereto; a first reflection film which is provided on the first substrate; a second reflection film which is provided on the second substrate; and a variable section which varies the gap; wherein the second substrate includes: a first layer which has a movable section; and a second layer which is laminated to a surface of the first layer facing the first substrate, is formed in a plate shape with a uniform thickness, and has a support section configured to displaceably support the movable section; and the first layer is not laminated to at least a region overlapping with the support section in the planar view. | 08-11-2011 |
| 20110228279 | FABRY-PEROT FOURIER TRANSFORM SPECTROMETER - A spatial Fourier transform spectrometer is disclosed. The Fourier transform spectrometer includes a Fabry-Perot interferometer with first and second optical surfaces. The gap between the first and second optical surfaces spatially varies in a direction that is orthogonal to the optical axis of the Fourier transform spectrometer. The Fabry-Perot interferometer creates an interference pattern from input light. An image of the interference pattern is captured by a detector, which is communicatively coupled to a processor. The processor is configured to process the interference pattern image to determine information about the spectral content of the input light. | 09-22-2011 |
| 20110267625 | INTERFEROMETER WITH FREQUENCY COMBS AND SYNCHRONISATION SCHEME - An embodiment relates to an interferometer comprising: a first frequency comb; a second frequency comb adapted to interact with the first frequency comb in order to produce interferences; means for isolating the beating signal between a subset of frequency components among the frequency components of the two combs. This subset of frequency components may be preferably, but not necessarily, a single line of the first frequency comb and a single line of the second frequency comb; means for monitoring this beating signal and using it as a trigger or as a clock for the acquisition unit device recording the beating interference signal between the entire frequency components of the first and the second frequency combs. | 11-03-2011 |
| 20120002212 | DUAL-ETALON CAVITY RING-DOWN FREQUENCY-COMB SPECTROSCOPY - In an embodiment, a dual-etalon cavity-ring-down frequency-comb spectrometer system is described. A broad band light source is split into two beams. One beam travels through a first etalon and a sample under test, while the other beam travels through a second etalon, and the two beams are recombined onto a single detector. If the free spectral ranges (“FSR”) of the two etalons are not identical, the interference pattern at the detector will consist of a series of beat frequencies. By monitoring these beat frequencies, optical frequencies where light is absorbed may be determined. | 01-05-2012 |
| 20120038928 | SYSTEM AND METHOD FOR OPTICAL MEASUREMENT OF A TARGET - The invention relates to a system and a method for optical measurement of a target, wherein the target is illuminated, either actively illuminated, reflecting ambient light, or self illuminating, and a measurement light beam received from the target or through it is detected. The prior art optical measurement systems generally include mechanical filter wheels and photomultiplier tubes, which cause the equipment to be expensive, large-sized and often not sufficiently accurate and stable. The objective of the invention is achieved with a solution, in which the illuminating light beam and/or measurement light beam is led through a Fabry-Perot interferometer or a set of two or more Fabry-Perot Interferometers, and the Fabry-Perot interferometer or a set of two or more Fabry-Perot Interferometers is controlled into different modes during the measurement of a single target. The invention can be applied in optical measurements where, for example, reflectance, absorption of fluorescence of the target is measured. | 02-16-2012 |
| 20120075636 | Tunable optical filters using cascaded etalons - A temperature-tuned dielectric-slab-etalon scanning spectrometer that is low cost and simple to fabricate uses cascaded etalon modules, each module comprising a Fabry-Perot (FP) etalon having a relatively small Free Spectral Range (FSR), with at least two modules provided with a temperature control. According to the invention, the multiple FP modules produce Vernier tuning control. In these devices, the tuning temperature range is typically less than 10° C., and the required slab thickness may be less than 1 mm. This reduces fabrication and material requirements, and results in lower device cost and improved reliability. | 03-29-2012 |
| 20130016359 | VARIABLE SPECTRAL ELEMENT - A variable spectroscopic element in which a placed position of first sensor and a placed position of the third sensor are symmetrical and a placed position of second sensor and a placed position of fourth sensor are symmetrical with respect to a line connecting the centers of mass of the surfaces of a pair of optical substrates opposite to each other respectively and first to fourth actuators are arranged includes a control unit which calculates a distance between the centers of mass, a first angle that is made between the moved optical substrate and the other optical substrate and a second angle that is made between the other optical substrate and the moved optical substrate, with signals from the first to fourth sensors, and drives the first to fourth actuators on the basis of the distance between the centers of mass, the first angle, and the second angle. | 01-17-2013 |
| 20130169970 | COMPOSITE FABRY-PEROT SENSOR - A self-referencing composite Fabry-Pérot cavity sensor, including methods of use and manufacture. The cavity sensor comprises a substrate defining a first cavity portion juxtaposed to a second cavity portion. The first and second cavity portions are provided having a predetermined depth offset. A polymer or other dielectric material is disposed within the first and second cavity portions. An interference spectrum resulting from a light source of a known wavelength is reflected through the sensor and produces a first refractive index from the first cavity portion offset by a second refractive index from the second cavity portion. The difference in refractive indices can be used to determine various physical parameters. An optical sensor according to the present technology may be used with vapor sensing, pressure sensing, protein detection, photo-acoustic imaging, and the like. | 07-04-2013 |
| 20130215429 | APPARATUS FOR GAS SENSING BY USING FIBER FABRY-PEROT INTERFEROMETER - The present invention relates to an apparatus for gas sensing including: a header part to generate interference wave to light from light source by the principle of fiber fabry-perot interferometer; and an optical spectrum analyzer to decide existence of specific gas based on change of spectrum periodicity of the interference wave, wherein the header part includes a sensing material that expands or shrinks by the above specific gas and the above interference wave changes its spectrum periodicity depending on expansion and shrinkage of the above sensing material. | 08-22-2013 |
| 20130314715 | Method and Apparatus for Correcting Bias Error in Ring-Down Spectroscopy - An apparatus is provided. The apparatus includes a laser source and a ring-down optical resonator that performs cavity ring-down spectroscopy, the optical resonator receives coherent optical energy from the laser, wherein an extinction rate of optical resonance within the optical resonator is at least 100 times longer than an extinction rate of optical energy emitted from the laser source first following deactivation of the laser source. | 11-28-2013 |
| 20140368825 | MIRROR FOR A FABRY-PEROT INTERFEROMETER, AND A METHOD FOR PRODUCING THE SAME - A method for producing a mirror plate for a Fabry-Perot interferometer includes providing a base slab, which includes a substrate coated with a reflective multilayer coating, forming one or more intermediate layers on the base slab such that the lowermost intermediate layer substantially consists of silica, and such that the multilayer coating is at least partially covered by the lowermost intermediate layer, forming one or more capacitive sensor electrodes by depositing conductive material on top of the intermediate layers, and removing material of the lowermost intermediate layer by etching in order to form an exposed aperture portion of the multilayer coating. | 12-18-2014 |
| 20140368826 | CAVITY ENHANCED SPECTROSCOPY - The present disclosure describes cavity enhanced spectroscopy (CES) apparatuses, and systems, and methods of forming the same. An example of a CES apparatus includes a first partial reflector, an optical cavity to expose a sample to electromagnetic radiation below the first partial reflector, and a semiconductor wafer with the first partial reflector and the optical cavity formed thereon. | 12-18-2014 |
| 20150043000 | WAVELENGTH MONITOR AND OPTICAL MODULE - A wavelength monitor monitors wavelengths of laser beams emitted from a laser source and transmitted through a collimating lens. The wavelength monitor comprises an etalon that serves as an optical filter, and an optical detector. The etalon has a transmittance that is periodic with respect to a frequency, and is disposed such that a pair of collimated beams, emitted through a pair of emitting ports of the laser source and then transmitted through the collimating lens, is incident on the optical filter at symmetrically positive and negative angles. The optical detector receives the pair of collimated beams transmitted through the etalon, and detects the intensities of the pair of collimated beams. | 02-12-2015 |
| 20150092194 | Spectrometer for Gas Analysis - A spectrometer ( | 04-02-2015 |
| 20150116721 | ULTRA-THIN OPTICAL COATINGS AND DEVICES AND METHODS OF USING ULTRA-THIN OPTICAL COATINGS - A spectral encoder includes a thin layer of lossy dielectric material whose thickness varies transversely from 0 to a thickness of about λ/4n (e.g., <100 nm), where λ is the wavelength of incident radiation and n is the dielectric material's refractive index. The dielectric layer reflects (and/or transmits) light at a wavelength that depends on the layer's thickness. Because the dielectric layer's thickness varies, different parts of the dielectric layer may reflect (transmit) light at different wavelengths. For instance, shining white light on a dielectric layer with a linearly varying thickness may produce a rainbow-like reflected (and/or transmitted) beam. Thus, the spectral encoder maps different wavelengths to different points in space. This mapping can be characterized by a transfer matrix which can be used to determine the spectrum of radiation incident on the spectral encoder from the spatial intensity distribution of the radiation reflected (and/or transmitted) by the spectral encoder. | 04-30-2015 |
| 20150138561 | SPECTROSCOPIC MEASUREMENT APPARATUS AND SPECTROSCOPIC MEASUREMENT METHOD - A spectroscopic measurement apparatus includes a wavelength tunable interference filter that selects light of a predetermined wavelength from incident light, allows the selected light to exit, and is capable of changing the wavelength of the light that is allowed to exit, a light dividing element that divides the exiting light having exited out of the wavelength tunable interference filter into a plurality of light fluxes, and a first light receiving device and a second light receiving device that are provided in correspondence with the plurality of divided light fluxes divided by the light dividing element and have sensitivities different from each other. | 05-21-2015 |
| 20150292944 | Fringe Reduction in Laser Spectroscopy - An optical phase scrambler is coupled to a laser source to randomly modulate the optical phase. Since the optical phase is continuously changing in a random fashion, at the output of an etalon interferometer formed in the optical path, the two or more components in the interference always have certain time delay between each other, resulting in a random phase different between each other. Therefore, after interference, the fringe amplitude varies randomly as well. Then at the receiver side, the fringe noise is greatly reduced after averaging over time. | 10-15-2015 |
| 20150292947 | QCL Spectroscopy System and Applications Therefor - A spectroscopy system comprising at least two laser modules, each of the laser modules including a laser cavity, a quantum cascade gain chip for amplifying light within the laser cavity, and a tuning element for controlling a wavelength of light generated by the modules. Combining optics are used to combine the light generated by the at least two laser modules into a single beam and a sample detector detects the single beam returning from a sample. | 10-15-2015 |
| 20150300948 | DEVICE AND METHOD FOR FAST RECORDING OF AN ABSORPTION SPECTRUM OF A FLUID - A device for recording an absorption spectrum of a fluid has a radiation source ( | 10-22-2015 |
| 20150346031 | FABRY-PEROT INTERFEROMETER BASED SATELLITE DETECTION OF ATMOSPHERIC TRACE GASES - Systems, methods, and devices relating to optical imaging systems for gathering data on atmospheric trace gas emissions from a satellite. An optical system used in the satellite has a Fabry-Perot interferometer coupled to a suitable telescope. The interferometer is a wide angle Fabry-Perot interferometer which creates a fringing pattern in concentric circles with each fringe being a different wavelength on the imaging system. A filter is used with the optical system and allows multiple adjacent modes in a selected spectral range to pass through the interferometer to the imaging system. Each pixel in the imaging system collects light at multiple wavelengths within the selected spectral range. The optical system gathers multiple images of the target area allowing light from the target area to be collected at multiple different wavelengths. Different absorption data for different atmospheric trace gases can be gathered in a single satellite pass over the target area. | 12-03-2015 |
| 20160018262 | OPTICAL FILTER AND OPTICAL MEASURING DEVICE EMPLOYING THE SAME - Provided are an optical filter and an optical measuring device employing the optical filter. The optical filter comprises at least one pixel. The at least one pixel comprises a first reflective plate that is configured to receive the incident light and have a plurality of first holes formed therein; and a second reflective plate that is configured to transmit particular wavelength or range of wavelengths of the light transmitted through the first reflective plate, faces the first reflective plate with a gap between the first reflective plate and the second reflective plate, and has a plurality of second holes formed therein. | 01-21-2016 |
| 20160054179 | Spectrophotometer Comprising an Integrated Fabry-Perot Interferometer - An “integrated” Fabry-Perot interferometer, such as for use in a spectrophotometer, is fabricated by attaching two micro-machined semiconductor-on-insulator wafers to one another. One mirror is formed on each micro-machined wafer. One mirror is supported by a thermally insulated, suspended micro-platform. In some embodiments, interferometer cavity length is adjustable. Detectors are disposed at least partially within the micro-platform. In some embodiments, the interferometer, a light source, and other circuitry and components, such as wireless communications components, are contained in a sealed package that includes a sampling region, thereby providing an integrated spectrophotometer. The integrated spectrophotometer can be implanted, for example, in animal tissue environments, such as for analyzing various compounds in the blood. | 02-25-2016 |
| 20160123809 | FABRY-PEROT SPECTRAL IMAGE MEASUREMENT - A system for wide-range spectral measurement includes one or more broadband sources, an adjustable Fabry-Perot etalon, and a detector. The one or more broadband sources is to illuminate a sample, wherein the one or more broadband sources have a short broadband source coherence length. The adjustable Fabry-Perot etalon is to optically process the reflected light to extract spectral information with fine spectral resolution. The detector is to detect reflected light from the sample, wherein the reflected light is comprised of multiple narrow-band subsets of the illumination light having long coherence lengths and is optically processed using a plurality of settings for the adjustable Fabry-Perot etalon, and wherein the plurality of settings includes a separation of the Fabry-Perot etalon plates that is greater than the broadband source coherence length but that is less than the long coherence lengths. | 05-05-2016 |
| 20160139038 | GAS SENSOR - One example discloses an interferometer device, including: a first side, having a first reflectivity; a second side, having a second reflectivity; a cavity disposed between the first and second sides, and having an opening configured to receive a substance; an electromagnetic source input region configured to receive an electromagnetic signal; and an electromagnetic detector output region configured to output the electromagnetic signal modulated in response to the substance in the cavity. Another example discloses a method including: fabricating a first side, having a first reflectivity; fabricating a second side, having a second reflectivity and positioned with respect to the first side so as to form a cavity; fabricating an opening configured to receive a substance; fabricating an electromagnetic source input region configured to receive an electromagnetic signal; and fabricating an electromagnetic detector output region configured to output the electromagnetic signal modulated in response to the substance in the cavity. | 05-19-2016 |
| 20160161336 | METHOD AND APPARATUS FOR MULTIPLEXED FABRY-PEROT SPECTROSCOPY - A method of optical spectroscopy and a device for use in optical spectroscopy. The device includes a substrate, and a plurality of etalon cavities affixed to or coupled to the substrate. A signal is received from a Fabry-Perot interferometer. The signal is sampled using the device according to a generalized Nyquist-Shannon sampling criterion. The signal is sampled using the device according to a phase differential criterion for wave number resolution. An input spectrum for the signal is reconstructed based on the signal sampled according to the generalized Nyquist-Shannon sampling criterion and the signal sampled according to the phase differential criterion for wave number resolution. | 06-09-2016 |
