|| List of recent Second Wave-related patents
| Systems and methods for enhancing the visibility of medical items|
Systems and methods make medical items more visible during a medical procedure. An example medical item includes an absorbent material adapted to absorb fluid during a medical procedure, the absorbent material having an outer surface that reflects one or more first wavelengths of light to provide the absorbent material with one or more first colors.
| Optical transceiver with isolated modulator contacts and/or inputs|
A multi-channel optical transmitter generally includes a first light source configured to emit light of a first wavelength, a second light source configured to emit light of a second wavelength, a first modulator configured to modulate the light of the first wavelength, and a second modulator configured to modulate the light of the second wavelength. The first modulator has a first anode and a first cathode, and the second modulator has a second anode and a second cathode electrically isolated from the first anode and the first cathode.
| Measurement of total hemoglobin in whole blood|
A method for determining total hemoglobin concentration in a blood sample comprising spectrophotometric analysis of a blood sample at two wavelengths and determining a ratio of the detected radiation at a first wavelength to the detected radiation at a second wavelength; and determining a concentration of total hemoglobin in the blood sample based on the ratio.. .
Mec Dynamics Corporation
| Light source unit and projector|
A small light source unit is provided which emits lights of the primary colors which are highly bright and which have a high color reproducibility and excitation light, and the light source unit includes a light source module and a light source control module and the light source module has a first light source which emits light having a first wavelength which is used as excitation light which excites a luminescent material, and a second light source which emits light having a second wavelength which is different from the first wavelength but which falls within a range of wavelengths of light of a similar color to that of the light of the first light source, and the light source control module controls individually the illumination of the first light source and the second light source.. .
Casio Computer Co., Ltd.
| Ultra high-resolution volumetric three-dimensional display|
An ultra high-resolution volumetric three-dimensional (3d) display system comprises an image chamber, and an addressing system to direct a beam of electromagnetic energy at a first wavelength to slice through the image chamber. The beam of electromagnetic energy slices the image chamber along a first axis to provide an image slice.
| Light-emitting element and the manufacturing the same|
The present application discloses a light-emitting element comprising a semiconductor light-emitting stack emitting a first light which has a first color coordinate, a first wavelength conversion material on the semiconductor light-emitting stack converting the first light to emit a second light, and a second wavelength conversion material on the first wavelength conversion material converting the second light to emit a third light. The first light and the second light are mixed to be a fourth light having a second color coordinate.
|Treatment apparatus and use thereof for treating psoriasis|
A treatment apparatus (10) is used for treatment of parts of a skin (5). The apparatus comprises a radiation source (1) emitting radiation, and a radiator (2) for guiding the emitted radiation to the parts of the skin (5).
Koninklijke Philips N.v.
|Optical electro-mechanical hearing devices with combined power and signal architectures|
An audio signal transmission device includes a first light source and a second light source configured to emit a first wavelength of light and a second wavelength of light, respectively. The first detector and the second detector are configured to receive the first wavelength of light and the second wavelength of light, respectively.
|Lte channel access over unlicensed bands|
Methods, systems, and devices are described for wireless communications. In one method, a clear channel assessment (cca) may be performed at a base station to determine availability of an unlicensed spectrum.
|Fiber signal loss event identification|
A system includes a wavelength tunable laser to provide a first optical pulse of a first wavelength and a second optical pulse of a second wavelength to an optical fiber, a reflection detector to determine a first fiber attenuation curve from the first reflected pulse and a second fiber attenuation curve from the second reflected pulse, and a discontinuous loss event analyzer to identify a discontinuous loss event at a discontinuous loss point in at least one of the first fiber attenuation curve and the second first fiber attenuation curve, determine a return loss slope based on a return loss at the discontinuous loss point for the first fiber attenuation curve and a return loss at the discontinuous loss point for the second first fiber attenuation curve, and determine whether the discontinuous loss event is a bad fiber bending event based on the return loss slope.. .
Verizon Patent And Licensing Inc.
An endoscope apparatus includes an illuminating section capable of irradiating a subject with a light in a first wavelength band and light in a second wavelength band, an image processing section including a color filter configured by a plurality of filters, the image processing section generating, from two image pickup signals respectively generated in a first pixel and a second pixel that respectively receive light in a predetermined wavelength band and light in a wavelength band different from the predetermined wavelength band among return lights from the subject, first and second image signals, a control section that determines whether the two image pickup signals can be separated into the first and second image signals, and an illumination control section that performs irradiation in a time division manner or simultaneous irradiation according to a determination result whether the separation is possible or not.. .
Olympus Medical Systems Corp.
Method and generating color image and depth image of object by using single filter
An apparatus for generating an image representing an object is provided. The apparatus may include a filtering unit configured to acquire first light of a first wavelength band and second light of a second wavelength band, which are included in light reflected from the object, by using a single filter; a sensing unit configured to convert both the first light and the second light into charges or convert only the second light into charges; a first image generating unit configured to generate a first image representing the object by correcting color values corresponding to the charges into which the first light and the second light have been converted; and a second image generating unit configured to generate a second image representing the object by using the charges into which the second light has been converted..
Samsung Electronics Co., Ltd.
Analysis and control of aerosol flow
An aerosol generation system has a light source arrangement which provides signals at first and second wavelengths, and the detected light signals are recorded. The detected signals are processed to derive at least a measure of the aerosol particle size.
Koninklijke Philips N.v.
Absolute distance laser interferometer
A device for absolute distance measurement includes a first tunable light source for emitting a first wavelength light of a first tunable frequency modulated by a first modulating frequency and a second light source for emitting a second wavelength light of a second frequency modulated by a second modulating frequency. An optical coupler couples the first wavelength light and the second wavelength light into an interferometer cavity.
Attocube Systems Ag
Semiconductor processing apparatus using laser
Provided is a semiconductor processing apparatus, including a first laser beam irradiation unit having a first variable beam expanding telescope and a first galvanometer scanner transferring a first laser beam having a first wavelength, a second laser beam irradiation unit having a second variable beam expanding telescope and a second galvanometer scanner transferring a second laser beam having a second wavelength, and a telecentric lens.. .
Samsung Electronics Co., Ltd.
Method for determining noise level
The present invention relates to a method for determining noise levels in a subband of an image. The method comprises receiving the subband of the image, defining block regions in the at least two space domains of the subband, for each defined block region, identifying first wavelet coefficients associated with coordinate values in the at least two space domains in the defined block region, computing a correlation matrix between identified wavelet coefficients to determine the correlation between first wavelet coefficients according to the at least one color domain, computing second wavelet coefficients, the computation of second wavelet coefficients being based on the correlation matrix and the first wavelet coefficients, computing at least one noise level, the noise level computation being based on at least one second wavelet coefficient and providing the at least one noise level..
Qualcomm Technologies, Inc.
Method and image content detection and image content replacement system
A subject (10), such as a billboard, has a filtering film (15) to absorb electromagnetic radiation specifically in a first wavelength band. A detector (60) provides a first detector signal (61a) relating to the first wavelength band and a second detector signal (61b) relating to another, different, second wavelength band, respectively.
Systems and methods for detecting multiple infrared bands
A dual-band infrared detector is provided. The dual-band infrared detector includes a first absorption layer, a barrier layer coupled to the first absorption layer, and a second absorption layer coupled to the barrier layer.
The Boeing Company
Thickness measuring apparatus and thickness measuring method
Provided are a thickness measuring apparatus and a thickness measuring method. The thickness measuring method includes irradiating first laser beam of a first wavelength λ1 to a transparent substrate and measuring intensity of first laser beam transmitting the transparent substrate; irradiating second laser beam of a second wavelength λ2 to the transparent substrate and measuring intensity of second laser beam transmitting the transparent substrate; and extracting a rotation angle on a lissajous graph using the first and second laser beams transmitting the transparent substrate.
Korea Research Institute Of Standards And Science
Multiple wavelength optical assemblies for inline measurement of optical power and fiber optic networks
An apparatus for measuring optical power including a first multiplexer/demultiplexer to split/combine an optical signal including a first wavelength and second wavelength; a second multiplexer/demultiplexer to split/combine an optical signal including the first wavelength and the second wavelength; a first tap photodetector coupled to the first and second multiplexer/demultiplexers and to a first measurement device; and a second tap photodetector coupled to the first and second multiplexer/demultiplexers and to a second measurement device.. .
Afl Telecommunications Llc
Pulsed fiber laser with double- pass pumping
A pulsed fiber laser oscillator comprising in succession: a pumping source (10) for providing pumping energy at a first wavelength to a multimode optical fiber; a first bragg grating optical filter (11) reflecting a second wavelength and transparent to said first wavelength; an active optical fiber (20) having a predefined wavelength which emits radiation at said second wavelength; a switch (14) arranged to periodically interrupt said second wavelength to provide a pulsed laser beam; and a second bragg grating optical filter (15) partially reflecting said second wavelength; characterized by comprising, following said active optical fiber (20), a reflector (21) of said first wavelength, such that said pumping energy undergoes two passages within said active optical fiber (20); said predefined wavelength being determined such that the absorption of said pumping energy at said first wavelength within said active optical fiber (20) is greater than 80% after undergoing said two passages.. .
Datalogic Automation S.r.l.
Electrostatic chuck system and semiconductor fabrication device
An electrostatic chuck system comprising a chuck body 1 having a clamping face 4 for electrostatically clamping a substrate 5, an electrode portion 2 generating a clamping force on the clamping face 4, a temperature-regulating portion 3 regulating the temperature of the substrate 5 to maintain it at a predetermined level, and a controller 10 controlling the voltage applied to the electrode portion 2, wherein, prior to completion of the electrostatic clamping of the substrate 5 to the chuck body 1, a voltage waveform obtained by superimposing a first waveform, which changes in a stepwise, rectilinear, or quadratic manner between a first level and a second level having a larger absolute value than the first level, and a periodic second waveform, which may be any of a rectangular wave, a triangular wave, a saw-tooth wave, or a sine wave, is applied by the controller 10 to the electrode portion 2.. .
Nissin Ion Equipment Co., Ltd.
Optical mode conversion using intermodal chrenkov radiation
Embodiments of the present invention generally relate to optical mode conversion using intermodal cherenkov radiation. More specifically, embodiments of the present invention relate to optical mode conversion utilizing intermodal four-wave mixing to convert light between modes for complex applications, whereby one of the four waves is generated from cherenkov radiation.
A waveguide coupler comprising: a first coupling portion arranged to couple with a first waveguide and a second coupling portion arranged to couple with a second waveguide so as to connect the first waveguide and the second waveguide together; wherein arranged between the first and second coupling portions is a wave modulation portion arranged to modulate wave signals transferred between the first waveguide and the second waveguide.. .
City University Of Hong Kong
Method and device for examining a biological tissue by analysing fluorescence response to illumination and for treating the tissue
Method, and the associated device, for examining a biological tissue, in particular dental tissue or tooth enamel of one or several teeth, the method including the steps of taking into account at least the fluorescence of the tissue detected in a first wavelength range and the fluorescence of the tissue detected in a second wavelength range. The device can be a surgery microscope with one or several filters.
Carl Zeiss Meditec Ag
Inversion techniques using streamers at different depths
Techniques are disclosed relating to geophysical surveying and data processing using streamers at different depths. In one embodiment, a method includes obtaining geophysical data specific to a geophysical formation that includes a first set of data representative of a first particle motion signal and a first pressure signal recorded using sensors at a first depth and a second set of data representative of a second particle motion signal and a second pressure signal recorded using sensors at a second, greater depth.
Pgs Geophysical As
Light-emitting device and projection apparatus
A light-emitting device includes: a semiconductor light-emitting element which emits light of a first wavelength; and a first wavelength conversion unit which includes a first phosphor and emits light of a second wavelength by being excited by the light of the first wavelength. The first phosphor contains europium as an activator.
Display efficiency optimization by color filtering
Technology is disclosed for optimizing a near-eye display using a waveguide. A first waveband for a first color narrower than the full spectral bandwidth for the first color and a second waveband for a second color adjacent to the first color in the visible spectrum are generated in image light of an image generation unit like a microdisplay.
Biological information displaying apparatus and biological information displaying method
A biological information displaying apparatus includes an analyzing unit and a display unit. The analyzing unit analyzes measured continuous biological information waveforms to detect abnormal biological information waveforms.
Nihon Kohden Corporation
Scanning laser projector
A scanning projector for projecting an image comprising multiple wavelength signals is disclosed. Embodiments of the present invention include a beam combiner comprising a planar lightwave circuit having a plurality of surface waveguides arranged to define a plurality of input ports, a mixing region, and an output port.
Image sensor, manufacturing the same, and image processing device having the image sensor
An image sensor comprising: a first layer having a plurality of groups of photodiodes formed in a semiconductor substrate, each group representing a 2×2 array of photodiodes, with 2 first pixels configured to detect light of a first wavelength and 2 second pixels configured to detect light of a second wavelength, each first pixel positioned adjacent to the second pixels; and a second layer overlapping the first layer, the second layer is organic, having a plurality of organic photodiodes configured to detect light of a third wavelength, each organic photodiode positioned to partially overlap 2 first photodiodes and 2 second photodiodes of the first layer.. .
Light emitting device for illuminating plants
A spectrally adapted light emitting device for illuminating plants includes at least one semiconductor light-emitting diode (led), at least one light conversion element for down-converting a portion of light emitted at the first wavelength to at least a second wavelength between 600 nm-680 nm, and at least one scattering device to diffuse light within the light emitting device. The at least one led is configured to emit at least a first wavelength between 400 nm and 480 nm.
Venntis Technologies Llc
An electric heater (10) includes at least one heater element (12) which is adapted to emit electromagnetic radiation (30) having a first wavelength. A reflector (16) adjacent the heater element reflects radiation from the element, the reflected radiation (32) also having the first wavelength.
Bromic Healing Pty Ltd.
Picosecond optical radiation systems and methods of use
Methods, systems and apparatus are disclosed for delivery of pulsed treatment radiation by employing a pump radiation source generating picosecond pulses at a first wavelength, and a frequency-shifting resonator having a lasing medium and resonant cavity configured to receive the picosecond pulses from the pump source at the first wavelength and to emit radiation at a second wavelength in response thereto, wherein the resonant cavity of the frequency-shifting resonator has a round trip time shorter than the duration of the picosecond pulses generated by the pump radiation source. Methods, systems and apparatus are also disclosed for providing beam uniformity and a sub-harmonic resonator..
Tunable laser emission device
A second waveguide (5) made of silicon on silicon dioxide and disposed parallel to the first waveguide spaced from the first waveguide in a vertical direction of the emission device so as to allow the existence of a hybrid optical mode coupled at one and the same time to the second waveguide and to the first waveguide, the second waveguide comprising a distributed reflector (9) along the second waveguide, the second waveguide comprising transverse zones (11, 12, 13, 14) doped differently so as to form a polar junction oriented in a transverse direction of the emission device. Electrodes (15, 16) coupled to the doped transverse zones modify an effective index seen by the hybrid optical mode..
Ofdma overlay on legacy passive optical networks using optical nyquist filtering
Methods and systems for combining signals include modulating data onto a first signal at a first frequency and wavelength; modulating data onto a second signal at a second wavelength using a modulation scheme that produces spectral components at the first frequency; filtering the second signal using an optical filter to suppress spectral components that would cause interference to the first signal; and combining the first signal and the second signal onto a transmission medium.. .
Nec Laboratories America, Inc.
The invention relates to a mach-zehnder modulator comprising a first optical waveguide forming a first modulator arm and a second optical waveguide forming a second modulator arm of the mach-zehnder modulator, an electrode arrangement comprising a plurality of first waveguide electrodes for applying a voltage across the first optical waveguide and a plurality of second waveguide electrodes for applying a voltage across the second optical waveguide, at least one electrically conductive connecting element generating a short-circuit between at least one of the first waveguide electrodes and at least one of the second waveguide electrodes. The electrode arrangement is a travelling wave electrode arrangement further comprising a first and a second electrical line extending at least partially parallel to the first and second optical waveguide.
Fraunhofer-gesellschaft Zur FÖrderung Der Angewand Ten Forschung E.v.
Optical module and manufacturing the same
An optical module that facilitates positioning includes an optical device and a light transmitting member having a fitting portion into which a counterpart optical member is fitted and having a lens portion that collimates light of a first wavelength emitted from the optical device or that converges parallel light of the first wavelength emitted from the counterpart optical member into converged light to be incident on the optical device. The light transmitting member is formed such that a position of a leading end surface of the fitting portion coincides with a position of an imaging plane in a direction of the optical axis.
Sumitomo Electric Industries, Ltd.
Optical tomography apparatus, optical tomography method, and optical coherence tomography apparatus
Provided is an optical tomography apparatus acquiring high-quality tomographic images even if light source characteristic is different between sweeps in first and second directions, when acquiring the image by reciprocating sweep. The optical tomography apparatus includes: a wavelength swept light source device; a splitting-combining unit splitting light from the device into measurement and reference light, and combining return light from an object to be measured by the measurement light and the reference light; and an image processing unit acquiring a tomographic image of the object based on combined light.
Canon Kabushiki Kaisha
Optical signal switching device and optical transmission system
An optical signal switching device includes: first through third input ports; first through third output ports; first through third optical splitters: first through third optical couplers; first through third short wavelength pass filters respectively configured to pass the first wavelength band; and first through third long wavelength pass filters respectively configured to pass the second wavelength band. Each of the optical splitters splits a wdm optical signal input through a corresponding input port to be guided to a corresponding short wavelength pass filter and a corresponding long wavelength pass filter.
Fixtures for large area directional and isotropic solid state lighting panels
Reflector designs for a large area panel light source create induced draft cooling means adjacent to the panel light source. The panel light source has a wavelength conversion element on a solid state light source for emitting light of a first and second wavelength to form a broader emission spectrum of light from the panel light source..
Generating broadband light downhole for wellbore application
Generating broadband light downhole for wellbore application. A laser source is configured to reside outside a wellbore and produce a seed light pulse at a first wavelength spectrum.
Apparatus and multispectral imaging with parallax correction
An apparatus and a method for multispectral imaging that may, comprising a cyclopean camera arrangement comprising at least two spaced apart imaging sensors operating at a first waveband, an image combiner arranged to combine images from the at least two spaced apart imaging sensors to provide a first cyclopean image of a scene from a first virtual position, a further imaging sensor operating at a second waveband different from the first and arranged to provide a second image of the scene from a second position, and a second image combiner arranged to combine the first and second images of the scene to provide a multispectral image, wherein the first virtual position of the cyclopean camera arrangement and the second position of the further sensor are arranged to be substantially the same.. .
Image capture-display device
An image capture-display device includes: a light source that emits a light beam falling within a first wavelength range; an optical system arranged on the optical path of the light beam falling within the first wavelength range emitted from the light source and configured to reflect the light beam falling within the first wavelength range and transmit a light beam falling within a second wavelength range; a display panel arranged on the optical path of the light beam falling within the first wavelength range emitted from the light source and reflected by a dichroic mirror and configured to transmit the light beams falling within the first and second wavelength ranges; and an imaging device arranged opposite from the display panel with respect to the optical system and configured to receive the light beam falling within the second wavelength range transmitted through the display panel and the optical system.. .
Light emitting diode package structure
A led package structure includes a base portion, a light-emitting chip, a cup portion and an encapsulating glue. The base portion has an upper surface and a lower surface.
System, polarization control
A polarization control device includes a first wave plate having a first surface profile and a second wave plate having a second surface profile complimentary to the first surface profile. The optical axis of the first wave plate is orthogonal to the optical axis of the second wave plate.
Mach-zehnder modulator arrangement and operating a mach-zehnder modulator arrangement
An electro-optic mach-zehnder modulator arrangement includes first and second optical waveguides forming, respectively, first and second arms of the mach-zehnder modulator. An electrode arrangement includes a first waveguide electrode output port coupled to the first waveguide electrodes a second waveguide electrode arranged on top of a capacitive segment of the first and the second optical waveguides, respectively, such that a voltage can be applied across the capacitive segments of the first and second optical waveguide.
Light source device and projection-type display apparatus
A light source device includes a first light source that emits light of a first polarization, and a second light source that emits light of a second polarization whose polarization direction is different from the light of the first polarization by 90 degrees. A combined wavelength band of the light of the first polarization and the light of the second polarization is a first wavelength band.
Scanning endoscope system
A scanning endoscope system includes a fiber, a first actuator that is provided laterally of the fiber to swing the fiber, a second actuator that is arranged at a position opposite to the first actuator with the fiber intervened in between to swing the fiber, and a driver unit that outputs, to the first actuator, a first drive signal having either a first waveform such that a minimum value of a voltage value, which varies periodically with a positive voltage value as a center, is not less than zero, or a second waveform such that a maximum value of a voltage value, which varies periodically with a negative voltage value as a center, is not more than zero, and configured to output, to the second actuator, a second drive signal having the same waveform as the first drive signal and different phase from the first drive signal.. .
Volumetric light emitting device
A volumetric light emitting device includes a substrate, a semiconductor light emitting diode disposed on the substrate and a reflector ring extending axially from the substrate. The reflector ring defines a first volume bounded by the substrate, an inner wall of the reflector ring, and a terminal plane at a distal end of the reflector ring.
Light emitting device package and lighting apparatus using the same
Disclosed is a light emitting device, and more particularly are a light emitting device package configured to improve the quality of light and a lighting apparatus using the same. The light emitting device package includes a light emitting device located on a package main body, the light emitting device including a first light emitting device configured to emit light having a first wavelength band and a second light emitting device configured to emit light having a second wavelength band, a lens disposed over the light emitting device, and a wavelength conversion layer disposed over the lens, the wavelength conversion layer serving to absorb light having the first wavelength band or the second wavelength band so as to emit light having a third wavelength band..
Light source adjustment unit, optical measurement device, subject information obtaining system, and wavelength adjustment program
An optical measurement device includes a light source unit including a first laser light source configured to emit a laser beam having a first wavelength and a second laser light source configured to emit a laser beam having a second wavelength, a measurement wave number setting unit, and a light source adjustment unit configured to adjust at least one of the first wavelength and the second wavelength such that a difference between or a sum of a first wave number corresponding to the first wavelength and a second wave number corresponding to the second wavelength matches a measurement wave number set through the measurement wave number setting unit.. .
An optical receiver including a waveguide substrate including a first waveguide that transmits a main signal beam, a second waveguide that transmits a monitoring beam that has branched from the main signal beam, and a third waveguide that transmits an amplification beam to amplify the main signal beam; a light receiving device array including, integrally formed to the same substrate, a first light receiving device that detects the main signal beam and a second light receiving device that detects the monitoring beam; and a case that houses the waveguide substrate and the light receiving device array. The first light receiving device faces toward an end of the first waveguide, and the second light receiving device faces toward an end of the second waveguide..
Method for producing high-luminance monochromatic light based on optical wavelength conversion and light source
Disclosed is a method for producing a high-luminance monochromatic light based on optical wavelength conversion, which is used in a light source comprising an excitation light source, and comprises the steps of: setting a first wavelength conversion material and a second wavelength conversion material; using an excitation beam to excite the first wavelength conversion material and the second wavelength conversion material, wherein the first wavelength conversion material absorbs the excitation light to produce a first excited light; the second wavelength conversion material absorbs a first waveband portion of the first excited light to produce a second excited light, where the energy of the absorbed first waveband portion is more than 50% of the total energy of the first excited light; mixing the second excited light and the unabsorbed portion of the first excited light together to form the high-luminance monochromatic light.. .
Radiation generating apparatus and a generating radiation
Radiation generating apparatus is disclosed. The apparatus comprises a first radiation generating source for generating radiation comprising a first range of wavelengths, a second radiation generating source for generating radiation comprising a second range of wavelengths and a photoluminescent material which is arranged to absorb radiation in the first and second wavelength range and generate radiation comprising a third range of wavelengths.
System and synchronizing light pulses at a selected location.
A system (100) for spatially addressing the synchronization of two light pulses (118, 120) having a respective wavelength. The system (100) includes two light sources (110, 114), each one generating one of the light pulses (118, 120) in response to receiving a respective source trigger.
Image-capturing device and filter
An image-capturing device including a lens system and an image-capturing unit upon which light having passed through the lens system is incident, wherein the image-capturing unit includes a plurality of first image-capturing elements configured to receive light in a first wavelength band and a plurality of second image-capturing elements configured to receive light in a second wavelength band which is different from the first wavelength band, and wherein the lens system or the image-capturing unit is provided with an optical element so that the light in the first wavelength band of which light quantity is less than the light quantity of the light in the second wavelength band reaches the image-capturing unit.. .
Droplet generator with actuator induced nozzle cleaning
Systems (and methods therefor) for generating euv radiation that comprise an arrangement producing a laser beam directed to an irradiation region and a droplet source. The droplet source includes a fluid exiting an orifice and a sub-system having an electro-actuatable element producing a disturbance in the fluid.
Statistical optical design enabled via twdm-pon
An optical line terminal (olt) in a time and wavelength division multiplexed (twdm) passive optical network (pon). The olt comprises a first optical port, a second optical port, and a processor.
Time delay compensation for optical waveguides using a bidirectional wavelength scan
Methods and apparatus for accurately determining wavelength by compensating a time delay using a bidirectional wavelength scan are provided. One example method generally includes introducing first wavelength-swept light into an optical waveguide according to a first sweep function having a first wavelength sweep direction; interrogating one or more optical elements, having characteristic wavelengths, with the first wavelength-swept light to produce a first set of optical signals, wherein the optical elements are disposed along the optical waveguide; introducing second wavelength-swept light into the optical waveguide according to a second sweep function having a second wavelength sweep direction, wherein the second wavelength sweep direction is opposite the first wavelength sweep direction; interrogating the optical elements with the second wavelength-swept light to produce a second set of optical signals; and determining a parameter associated with at least one of the optical elements based on the first and second sets of optical signals..
Optical information device, cross-talk reduction method, computer, player, and recorder
A ratio xm of an information item recorded on an adjacent track relative to an information item recorded on a main track included in a first signal obtained from a first light flux having passed through a center region (6c) is different from ratios xs1 and xs2 of the information items recorded on the adjacent track relative to the information items recorded on the main track included in second and third signals obtained from second and third light fluxes having passed through first and second end regions (6r, 6l), and a ratio of respective gains of a first waveform equalizer (80c), a second waveform equalizer (80r), and a third waveform equalizer (80l) is determined so as to cancel the information item recorded on the adjacent track in each of frequency components of the first signal, the second signal, and the third signal.. .
A beam detector including a light source, a receiver, and a target, acting in cooperation to detect particles in a monitored area. The target reflects incident light, resulting in reflected light being returned to receiver.
Display backlight system
A polarizing color converting layer (104) arranged to receive light that is outcoupled from said light outcoupling surface, and comprising i) a color converting elements (105) capable of converting light of said first wavelength range into light of a second wavelength range, and ii) at least one region of an optically anisotropic material (108), and at least one region of an optically isotropic material (109), wherein said polarizing color converting layer is capable of preferentially scattering one linear polarization direction of light received from the light-emitting arrangement. The lighting device of the invention provides improved polarization efficiency.
Lighting device, projector including the same, and lighting method
A lighting device includes a first light source which emits excitation light, a wavelength convertor which generates fluorescence containing at least a first wavelength range and a second wavelength range by excitation with the excitation light, a second light source which emits light containing a third wavelength range different from the first wavelength range and the second wavelength range, an optical path-combining element which combines an optical path for the fluorescence from the wavelength convertor and an optical path for the light from the second light source, so as to guide the combined optical paths to a single emission optical path, and a light separator disposed in the emission optical path, which obtains and emits at least the first wavelength range and the second wavelength range of the fluorescence and at least the third wavelength range of the light from the second light source.. .
Ferrite circulator with integrated e-plane transition
A waveguide circulator system for an e-plane-layer transition includes a first waveguide including: at least n waveguide arms, and a first-interface aperture spanning a first x-y plane on a bottom surface of a first waveguide arm, a ferrite element having n segments protruding into the n respective waveguide arms of the first waveguide; an e-plane-transition waveguide having a first open-end and a second opposing open-end; and a second waveguide including a second-interface aperture spanning a second x-y. The first-interface aperture is arranged to proximally overlap the first open-end.
Systems and methods of optical code reading using a color imager
Systems and methods of optical code reading include production of image data by a color image sensor array and processing of the image data to decode an optical code. In one configuration, the color image sensor array includes first and second sets of sensor pixels sensitive to light having different wavelengths.
A lithotripter is provided for fragmenting a stone inside a patient's body. In one form, the lithotripter includes a motor having at least two modes of operation and is configured to produce first and second waveforms.
Laser device and photoacoustic measurement device
Disclosed is a laser device which can emit light having first and second wavelengths, having the advantage of increasing laser efficiency without causing an increase in cost. A flash lamp irradiates excitation light onto a laser rod.
Method for treating a substance with wave energy from an electrical arc and a second source
A substance is treated using a device having: (a) a volute or cyclone head, (b) a throat connected to the volute or cyclone head, (c) a parabolic reflector connected to the throat, (d) a first wave energy source comprising a first electrode within the volute or cyclone head that extends through the outlet into the opening of the throat along the central axis, and a second electrode extending into the parabolic reflector and spaced apart and axially aligned with first electrode, and (e) a second wave energy source disposed inside the throat, embedded within the throat or disposed around the throat. The substance is directed to the inlet of the volute or cyclone head and irradiated with one or more wave energies produced by the first and second wave energy sources as the substance passes through the device..
Optical mode conversion by nonlinear effects
Embodiments of the present invention generally relate to optical mode conversion by nonlinear effects. More specifically, embodiments of the present invention relate to nonlinear mode conversion utilizing intermodal four-wave mixing to convert light between modes having different wavelengths for complex applications.
Method for determining noise level
A method for determining noise levels in a subband of an image. The method comprises receiving the subband of the image, defining block regions in at least two space domains of the subband, for each defined block region, identifying first wavelet coefficients associated with coordinate values in the at least two space domains in the defined block region, computing a correlation matrix between identified wavelet coefficients to determine the correlation between first wavelet coefficients according to the at least one color domain, computing second wavelet coefficients, the computation of second wavelet coefficients being based on the correlation matrix and the first wavelet coefficients, computing at least one noise level, the noise level computation being based on at least one second wavelet coefficient and providing the at least one noise level..
Methods for modification of insect behaviour
A method is described for emitting an insect behaviour modification signal to create a protected zone into which insect entry is minimized. The use of complex waveforms is described, emitted at frequencies from 150.000 hz to 250.000 hz.