Abstract: Probe light pulses output from a light source are input to an optical effect unit after the beam diameter is changed by a beam diameter changing optical system, the pulse front is tilted by a pulse front tilting unit, and the beam diameter is adjusted by a beam diameter adjusting optical system. To the optical effect unit, probe light pulses output from the beam diameter adjusting optical system are input, and an electromagnetic wave being an object to be detected is also input. Optical characteristics of the optical effect unit change due to propagation of the electromagnetic wave, and probe light pulses affected by the change in optical characteristics are output from the optical effect unit. The probe light pulses output from the optical effect unit are detected by a photodetector.

Abstract: Infrared imagery device with integrated shield against parasite infrared radiation, and method of manufacturing the device. This device comprises a support (62) provided with an infrared radiation detector (40), at least one optical device (28) facing the detector, and a shield against parasite radiation. The shield comprises at least two continuous beads (c1, c2), spaced from each other, extending from the support as far as the optical device, provided with vents and made of a material that significantly attenuates parasite radiation, penetrating laterally between the support and the optical device. The two beads with their vents form a baffle. The device is manufactured using the flip chip technique.

Abstract: In an electrical device controlled by infrared signals from a remote control, a power saving device has an infrared detection module and a processor. The infrared detection module includes an infrared sensor configured to monitor the output of the remote control device, and a shield which is at least substantially impervious to infrared radiation, and which at least partially shields the infrared sensor from infrared radiation which does not emanate from the remote control device. The processor is coupled to the infrared detection module, and supplies power to the electrical device at least substantially only when the electrical device is in active use by a nearby user, and based at least in part upon input from the infrared sensor.

Abstract: The present invention relates to a simplified optical position sensing assembly, which includes a unitized optical assembly formed as a single component and a unitized optical circuit. The unitized optical assembly is attached or mounted to the unitized optical circuit. The unitized optical assembly may include a body and a single-element lens. The single-element lens can be injection-molded within a first cavity of the body so as to form a single component. An illumination window may be received within a second cavity extending from the back to the front of the body. The unitized optical circuit can include an energy source and a sensor directly connected thereto. The present invention also relates to an optical position sensing system incorporating such a simplified optical position sensing assembly and methods for manufacturing a unitized optical assembly.

Abstract: A light path adjusting assembly includes a supporting component and a light path adjusting component. The supporting component includes a mounting portion, a light transmission portion and a connecting portion. The light transmission portion faces to the mounting portion. The connecting portion is located between and is connected to the mounting portion and the light transmission portion, thereby forming a receiving space between the mounting portion and the light transmission portion. The light path adjusting component is disposed in the receiving space. An optical touch device using the light path adjusting assembly is also provided. The light path adjusting assembly and the optical touch device have a simple manufacturing process and a high production yield.

Abstract: A diffuse reflector of radiation in the near and mid infrared regions includes (i) an assembly that has a reflecting element and a diffusing element that is made of one or more layers of calcium fluoride, sapphire, or alumina; or (ii) a diffusively reflective surface configured as a metallic layer with a rough surface. The diffuse reflector can be incorporated into systems for measuring properties of sheet materials and particularly into optical sensors that include a measurement window configured with one or more of the diffuse reflectors that cause incident radiation from a sensor light source to be diffused and reflected a plurality of times within a layer of material before being detected by the sensor receiver.

Abstract: The present invention discloses a distance detecting sensor, comprising: a housing, a focusing lens, a circuit board, as well as a transmitter device for transmitting infrared light rays and a receiver device for receiving and sensing the reflected infrared light rays, wherein the housing comprises an elongated main body and two apertures located on a top surface of the main body; the lens comprises a transmitting lens and a receiving lens located at positions of the two apertures of the housing; the circuit board is received in the main body of the housing and located below the lens; the transmitter device and the receiver device are positioned directly below the transmitting lens and the receiving lens, wherein the transmitter device is an infrared light emitting diode and the receiver device is a distance detecting sensing module.

Abstract: A stray light baffle for a seeker or other sensor system and a method for making the same are provided. The seeker, for example, may include a first receiver configured to receive an infrared signal, a second receiver configured to receive a radio frequency signal, a dichroic mirror configured to reflect the infrared signal toward the first receiver and to transmit the radio frequency signal toward the second receiver, and a stray light baffle having a coarse surface comprising a plurality of peaks and a plurality of valleys, wherein an average height of the plurality of peaks is greater than or equal to an average width of the plurality of valleys.

Abstract: An integrated proximity and ambient light sensor assembly includes an emitter of an IR proximity signal, and a detector configured to detect the IR proximity signal from the emitter when the apparatus is sensing proximity, and to detect ambient light when the apparatus is sensing ambient light. The assembly includes an IR cut filter that has a film disposed over the detector that rejects IR light but passes visible light to the detector, and an opening in the film centered over a midpoint of the detector that passes IR and visible light to the detector. The opening allows IR light to reach the detector from within a narrow angle, but absorbs undesirable emitted IR light that is reflected by oily build-up or “smudge” left on a cover of the device. The film allows visible light to pass for a wider angle to better determine average ambient light.

Abstract: Occlusion sensor systems and methods of using the occlusion sensor systems are provided. In a general embodiment, the present disclosure provides a sensor device includes a tube and an infra-red reflective sensor comprising an infra-red light emitter and an infra-red photo-transistor receiver or photo-diode. The infra-red reflective sensor and the infra-red phototransistor receiver or photo-diode are positioned at or near the tube so that an infra-red light can be transmitted to a portion of the tube and at least a portion of the infra-red light reflected off the portion of the tube can be detected by the infra-red phototransistor receiver or photo-diode.

Abstract: In a terahertz antenna module 1, a photoconductive antenna element 17 is fixed to a wiring board 9, and electrically connected to an electric signal input/output pin 24 of an electric signal input/output port 23 via a signal electrode of the wiring board 9. Further, a buffer member 7, a hemispherical lens 8, a photoconductive antenna element 17, and the wiring board 9 are disposed in a recess 3 of a container 2 in this order from an opening 6 side of the container 2, and by attaching a cover 25 to the container 2, the wiring board 9, the photoconductive antenna element 17, and the hemispherical lens 8 are pressed against the buffer member 7. Further, the wiring board 9 is positioned by the recess 4 and the hemispherical lens 8 is positioned by the buffer member 7 so that the optical axis OA of the hemispherical lens 8 passes just through a photoconductive antenna part of the photoconductive antenna element 17.

Abstract: The present invention relates to ellipsometer and polarimeter systems, and more particularly is an ellipsometer or polarimeter or the like system which operates in a frequency range between 300 GHz or lower and extending to higher than at least 1 Tera-hertz (THz), and preferably through the Infra-red (IR) range up to, and higher than 100 THz, including: a source such as a backward wave oscillator; a Smith-Purcell cell; a free electron laser, or an FTIR source and a solid state device; and a detector such as a Golay cell; a bolometer or a solid state detector; and preferably including at least one odd-bounce polarization state image rotating system, and optionally including a polarizer, at least one compensator and/or modulator, in addition to an analyzer.

Abstract: An apparatus and method are disclosed for detecting terahertz radiation at room temperature. A detecting pixel includes a sub-wavelength split-ring resonator, and is mechanically coupled to (but thermally decoupled from) a substrate via a cantilever formed from two materials that have a significant mismatch in their thermal expansion coefficients. Incident radiation causes the split-ring resonator to resonate, thereby generating heat that is transferred to the cantilever, causing the cantilever to flex. An optical readout system includes a secondary light source, such as a laser, that shines on a reflective surface on the pixel, whereby a photodiode detects the reflected light and permits calculation of a relative deflection of the pixel in the nanometer range. An exemplary detector has a noise equivalent power rating of approximately 60 pW/?Hz.

Abstract: A Fresnel composite lens for used in an infrared touch control device including a number of infrared emitters and an infrared receiver. The Fresnel composite lens includes a number of Fresnel lens portions having a plurality of parallel optical axes, each Fresnel lens portion having a corresponding optical axis. Each Fresnel lens portion corresponds to a particular emitter and is configured for converging and directing light from a corresponding infrared emitter to the infrared receiver. The Fresnel lens portions are configured for focusing the light from the respective infrared emitters at a common point located on the infrared receiver.

Abstract: A system for detecting a flame. The system may discriminate between a detected hot object and flame. The system may be a camera-like structure incorporating an infrared sensor, a lens, and an element that could filter out some of the long-wave infrared radiation. The sensor may receive radiation of a scene which forms images on the sensor. The images may be provided to a processor that incorporates one or more modules to determine whether a flame is present in the scene.

Abstract: A system for testing an IR proximity sensor has an infrared reflector that receives radiation transmitted from the proximity sensor under test. An electronically modulated IR-transmissive device is positioned between the sensor and the reflector. A tester is coupled to control the IR-transmissive device for testing the sensor. Other embodiments are also described and claimed.

Abstract: The bolometer-type THz wave detector according to the present invention has a thermal isolation structure in which a temperature detecting portion including a bolometer thin film connected to electrical wirings is supported in a state of being raised from the substrate by a supporting portion including the electrical wirings connected to a Read-out integrated circuit formed in a substrate, and the detector comprises a reflective film formed on the substrate, an absorbing film formed on the front surface or back surface or at an inner position in the temperature detecting portion , whereby an optical resonant structure is formed by the reflective film and the absorbing film, and a dielectric film formed on the reflective film. The dielectric film thickness f is set so that air gap between an upper surface of the dielectric film and a lower surface of the temperature detecting portion is smaller than 8 ?m.

Abstract: An infrared sensor module includes: an infrared sensor device disposed on a substrate and configured to receive infrared signals; a signal processing circuit device configured to process an output from the infrared sensor device; a metal case which is provided at a predetermined distance from the infrared sensor device, which includes a light incident window provided with an optical system for coupling an image on the infrared sensor device from external infrared signals, and which accommodates the infrared sensor device and the signal processing circuit device; and a sensor cover which is disposed between the infrared sensor device and the case and the signal processing circuit device, and which includes a light-transmitting portion configured to guide the infrared signals entering via the optical system to the infrared sensor device.

Abstract: A terahertz scanning reflectometer is described herein. A high sensitivity terahertz scanning reflectometer is used to measure dynamic surface deformation and delamination characteristics in real-time. A number of crucial parameters can be extracted from the reflectance measurements such as dynamic deformation, propagation velocity, and final relaxation position. A terahertz reflectometer and spectrometer are used to determine the permeation kinetics and concentration profile of active ingredients in stratum corneum.

Abstract: A distance detection induction device comprises a housing, a condensing lens, a circuit board bearing multiple electronic components, an infrared light emitting means for emitting the infrared light, and a light receiving means for receiving and sensing the reflected infrared light. The housing comprises a main body and two round openings on the top of the main body. The condensing lens has an emitting lens and a receiving lens respectively located inside two round openings. The circuit board bearing the multiple electronic components is used for processing signal, and is mounted inside the main body of the housing. The infrared light emitting means is infrared light-emitting diode, and emits the infrared light to the emitting lens. The light receiving means is the distance detecting sensing module, and senses the reflected light focused by the receiving lens. Said distance detection induction device further comprises positioning brackets that match with the housing, and is fixed to the housing.

Abstract: A semi-active laser (SAL) sensing system is thus provided that uses a lens concentrator system to pass received reflected laser light from an aperture to a detector. The lens concentrator system facilitates the use of SAL systems with different laser designator wavelengths to improve the performance of the SAL system. In one embodiment, the lens concentrator system is formed from polymer having substantial optical clarity for radiation having wavelengths between approximately 1.5 and approximately 1.65 ?m. For example, the lens concentrator system may be formed from amorphous fluoropolymer. The lens concentrator system formed from amorphous fluoropolymer facilitates the use SAL designators using different wavelengths than those in past SAL sensing systems.

Abstract: An infrared imaging system used for providing images from a plurality of views. The multiple view infrared imaging system includes a plurality of lens and infrared focal plane array (FPA) pairings, wherein each pairing can be used to provide an image and/or sample scene data of a distinct view. A single set of processing circuitry and a single set of one or more output elements may be utilized to provide such images. A multi-input switch may be utilized in combination with the single set of processing circuitry and output elements to provide images from any of the lens and FPA pairings based on the positioning of the switch.

Abstract: Two-color (two-photon) excitation with two confocal excitation beams is demonstrated with a Raman shifter as excitation light source. Two-color excitation fluorescence is obtained from Coumarin 6H dye sample (peak absorption=394 nm, peak fluorescence=490 nm) that is excited using the first two Stokes outputs (683 nm, 954 nm, two-color excitation=398 nm) of a Raman shifter pumped by a 6.5 nsec pulsed 532 nm-Nd:YAG laser (Repetition rate=10 Hz). The two Stokes pulses overlap for a few nanoseconds and two-color fluorescence is generateven with focusing objectives of low numerical apertures (NA?0.4). We observed the linear dependence of the two-color fluorescence signal with the product of the average intensities of the two Stokes excitation beams. The two-color fluorescence distribution is strongly localized around the common focus of the confocal excitation beams.

Abstract: Disclosed herein is a sensing assembly. The assembly includes a sensing assembly housing for enclosing an interior. The assembly further includes a plurality of sensing assembly components which are at least partially positioned, or at least partially contained, within the interior. And the assembly includes an indicator lens device which is integral with, or integrated with respect to the housing. In at least some embodiments, at least a portion of the housing coincides at least in part with a first axis and at least a portion of the indicator lens coincides with a second axis, such that the first axis and the second axis intersect to form an oblique viewing angle range and at least a portion of the indicator lens device is visible at least substantially throughout the oblique (e.g., obtuse) viewing angle range.

Abstract: A multilayer electronic imaging module and sensor system incorporating a micro-lens layer for imaging and collimating a received image from a field of regard, a photocathode layer for detecting photons from the micro-lens layer and generating an electron output, a micro-channel plate layer for receiving the output electrons emitted from the photocathode in response to the photon input and amplifying same and stacked readout circuitry for processing the electron output of the micro-channel plate. The sensor system of the invention may be provided in the form of a Cassegrain telescope assembly and includes electromagnetic imaging and scanning means and beam-splitting means for directed predetermined ranges of the received image to one or more photo-detector elements which may be in the form of the micro-channel imaging module of the invention.

Abstract: A radiation detector including a substrate; a first inclined thin film disposed on a first main surface of the substrate, and having crystal planes serving as a factor in inducing anisotropy; a second inclined thin film disposed on a second main surface of the substrate opposite to the first main surface, and having crystal planes serving as a factor in inducing anisotropy; a first electrode pair of electrodes disposed on the first inclined thin film, the electrodes being opposed to each other in a direction in which the crystal planes of the first inclined thin film are aligned inclined to the first main surface; and a second electrode pair of electrodes disposed on the second inclined thin film, the electrodes being opposed to each other in a direction in which the crystal planes of the second inclined thin film are aligned inclined to the second main surface.

Abstract: Provided are a THz-wave generation/detection module and a device including the same, which increase heating efficiency and are miniaturized. The module includes a photomixer chip, a lens, a PCB, and a package. The photomixer chip includes an active layer, an antenna, and a plurality of electrode pads. The lens is disposed on the photomixer chip. The PCB includes a plurality of solder balls connected to the electrode pads, under the photomixer chip. The package surrounds a bottom and side of the PCB, and dissipates heating of the active layer, which is transferred from the electrode pad of the photomixer chip to the PCB, to outside.

Abstract: A radiation sensor includes first and second pixels with a radiation absorption filter positioned over the first pixel and an interference filter positioned over both the first and second pixels. The combined spectral response of the absorption filter and the first pixel has a first pixel pass-band and a first pixel stop-band. The spectral response of the interference filter has an interference filter pass-band which is substantially within the first pixel pass-band for radiation incident on the interference filter at a first angle of incidence, and substantially within the first pixel stop-band for radiation incident on the interference filter at a second angle of incidence greater than the first angle of incidence.

Abstract: One or more embodiments of the invention provide for a lens package comprising a housing having a vacuum compatible interior space, a base coupled to the housing, a lens coupled to the housing, and an infrared detector within the housing for providing infrared images representative of infrared energy received through the lens. The housing, base, and lens are adapted to form an infrared detector vacuum package assembly. The housing may include a focal alignment feature that allows for focal adjustment of the lens relative to the infrared detector by applying pressure to at least a portion of the housing.

Abstract: A detector includes a housing with at least one window for allowing radiation to enter, at least one sensor for sensing entered radiation, a unit for processing sensor signals, and mirrors that are shaped and mounted in the housing for reflecting radiation from outside detection zones better than radiation from elsewhere, onto the sensor. Linked mirrors reflect radiation from a detection zone consecutively and each mirror in at least one linked pair is shaped and mounted in the housing so as to prevent it from reflecting radiation from another detection zone in sequence with other mirrors onto the sensor, thus optically isolating the pair from other mirrors.

Abstract: An infrared retroreflecting device used for a high-aspect-ratio optical touch panel, comprising an infrared retroreflecting stripe having a front surface, a back side and an elongated axis; the stripe being formed of a cube-corner retroreflecting structure having a primary groove and at least two secondary grooves; the primary groove being perpendicular to the elongated axis; and the stripe reflecting infrared emitted toward the front surface when an infrared incident angle is ranged from about 0° to about 61°. A method of manufacturing an infrared retroreflecting device used for a high-aspect-ratio optical touch panel, comprising forming a cube-corner retroreflecting sheet having a front surface, a back side, a first direction and a second direction, said first direction being perpendicular to the second direction, and cutting a retroreflecting stripe from said cube-corner retroreflecting sheet in the second direction.

Abstract: A passive infra-red detector including at least three sub-detectors, each sub-detector being operative to receive infra-red radiation from a corresponding one of at least three sub fields-of-view, each sub field-of-view being exclusively defined by an optical element which does not define any other sub field of view, the sub fields-of-view being angled with respect to each other, adjacent ones of the sub fields-of-view being separated by a gap of no more than 30 degrees and at least one of the sub fields-of-view having at least one of the following characteristics: extending over no more then 45 degrees in azimuth; and including not more than three azimuthally distributed detection zones, and signal processing circuitry, operative to receive output signals from the sub detectors and to provide a motion detection output.

Abstract: Methods and systems for providing a light device that can emit light and sense light are disclosed. In one embodiment, a lighting device includes a light guide having a planar first surface, the light guide configured such that at least some ambient light enters the light guide through the first surface and propagates therein, and at least one light detector disposed along an edge of the light guide, the at least one detector optically coupled to the light guide to receive light propagating therein. The light detector can be configured to produce a control signal. In some embodiments, the lighting device also includes at least one light turning feature disposed on the first surface, the at least one light turning feature configured to direct light incident into the light guide through the first surface.

Abstract: The present invention relates to a terahertz imaging device comprising a terahertz source, a converter for converting terahertz radiation into thermal radiation, and a thermal detector. The converter has at least one zone sensitive to terahertz radiation, designed to absorb the terahertz radiation and vconvert the absorbed radiation into heat. This sensitive zone is close to a reference zone, of known absorption capacity, and the thermal detector is designed to measure the heat generated by the sensitive zone relative to the heat generated by the reference zone.

Abstract: In an infrared sensor 1 including a condenser lens 3 and a multi-element light-receiving unit 2 with a plurality of light-receiving elements 2a to 2h aligned therein on a straight line, a position of receiving an intensity distribution peak of infrared rays which have passed through the condenser lens 3 is deviated from the center position of the multi-element light-receiving unit 2 to a desired light-receiving element position. Especially when the infrared sensor 1 is included in an air conditioner, the position of receiving the intensity distribution peak of the infrared rays is set to the position of a light-receiving element used for detecting heat in a location far from the installment position of the air conditioner.

Abstract: Passive infrared detectors (20, 22, 24, 26, 28) carried by an elevator car (14) detect the presence of persons on top of or in the hoistway (12) below the elevator car (14). The passive infrared detectors (20, 22, 24, 26, 28) can also be used to detect open landing doors with no elevator present.

Abstract: An infrared detector includes a detecting element, a first electrode, a second electrode, and a covering structure. The detecting element defines an absorbing part and a non-absorbing part. The detecting element includes a first end and a second end opposite with the first end. The first end is disposed in the absorbing part. The second end is disposed in the non-absorbing part. The first electrode is electrically connected with the first end. The second electrode is electrically connected with the second end. The covering structure covers the non-absorbing part.

Abstract: A Multimode Optical Sensor (MMOS) is a laser radar (ladar) that employs both coherent, or heterodyne, and noncoherent detection at long range, i.e. ranges for which the target is no more than a pixel in dimension. Coherent detection provides much higher velocity resolution while the noncoherent detection can provide better detectability.

Abstract: A proximity sensor includes a printed circuit board (PCB); a first cup and a second cup embedded in the PCB; an electromagnetic radiation transmitter operably mounted in the first cup; and an electromagnetic radiation receiver operably mounted in the second cup.

Abstract: In a terahertz imaging system, a scanning component for scanning a field of view is tracked by an optical beam to obtain positional information. The optical tracking beam can be steered by the scanning component for example by reflection, refraction or diffraction. The steered tracking beam can then be detected by a spatially sensitive detector such as a charge-coupled device array. In a preferred embodiment, the output of a terahertz detector receiving terahertz radiation from the scanned field of view is used to modulate the tracking beam. This means that the spatially sensitive detector can provide an image directly derived from the scanning of the field of view by the terahertz radiation.

Abstract: According to some embodiments, an apparatus having a first sensor having a first adjustable lens and a second sensor having a second adjustable lens is disclosed. A controller is coupled to the first sensor and the second sensor. The controller is to cause the first sensor and the second sensor to operate independently in a first mode and is to cause the first motion sensor and the second motion sensor to operate interdependently in a second mode.

Abstract: An autonomous ventilation system includes a variable-speed exhaust fan, a controller, an exhaust hood, and an infrared radiation (“IR”) sensor. The exhaust fan removes air contaminants from an area. The controller is coupled to the exhaust fan and adjusts the speed of the exhaust fan. The exhaust hood is coupled to the exhaust fan and directs air contaminants to the exhaust fan. The IR sensor is coupled to the controller, detects changes in IR index in a zone below the exhaust hood, and communicates information relating to detected changes in IR index to the controller. The controller adjusts the speed of the exhaust fan in response to information relating to detected changes in IR index. The autonomous ventilation system also includes an alignment laser to indicate a point at which the IR sensor is aimed and a field-of-view (“FOV”) indicator to illuminate the zone in which the IR sensor detects changes in IR index.

Abstract: A conformal coherent wideband antenna coupled IR detector array included a plurality of unit cells each having a dimension that includes an antenna for focusing radiation onto an absorber element sized less than the dimension. In one embodiment, the absorber element may be formed of a mercury cadmium telluride alloy. According to a further embodiment, the antenna array may be fabricated using sub-wavelength fabrication processes.

Abstract: Pixel-level monolithic optical element configurations for uncooled infrared detectors and focal plane arrays in which a monolithically integrated or fabricated optical element may be suspended over a microbolometer pixel membrane structure of an uncooled infrared detector element A monolithic optical element may be, for example, a polarizing or spectral filter element, an optically active filter element, or a microlens element that is structurally attached by an insulating interconnect to the existing metal interconnects such that the installation of the optical element substantially does not impact the thermal mass or thermal time constant of the microbolometer pixel structure, and such that it requires little if any additional device real estate area beyond the area originally consumed by the microbolometer pixel structure interconnects.

Abstract: According to one embodiment of the present invention, a system for viewing an area includes a dewar and an optical system positioned within the dewar. The dewar permits operation of the flux detector at cryogenic temperatures, in some embodiments. The optical system includes an infrared radiation system capable of focusing one or more light beams. The inclusion of the optical system within the cryogenic space of the dewar allows reduction of the overall system length and weight, if desired.

Abstract: Imaging systems in which an undedicated optical component—i.e., a component that would be present in the system even in the absence of image stabilization—is configured to undergo corrective motion and/or other correction of image data, and thus to function as a stabilization component. The stabilization component may be a mirror and/or a lens, and a positioner may be provided to tilt, rotate, and/or otherwise precisely adjust the position and orientation of the stabilization component to improve image resolution, compensate for platform motions such as platform vibration, and/or improve image tracking. Because an undedicated optical component functions as the stabilization component, the stabilization occurs upstream, rather than downstream, from separation (if any) of the incoming image data into two or more beams.

Abstract: An infrared motion detector including at least one infra-red radiation sensor, at least one radiation reflecting surface, operative to direct radiation impinging thereon towards the at least one infra-red radiation sensor and at least one coating layer, coating the at least one radiation reflective surface, which is substantially reflective to far infra-red radiation and which strongly absorbs at least one of visible light and near infra-red radiation, wherein the at least one coating layer includes black nickel.

Abstract: An apparatus for detecting images in a first selected bandwidth includes a probe light source to generate a probe beam in a second selected bandwidth, an optical path including input imaging optics to capture an image in the first selected bandwidth and form an image beam and a beam combiner to optically combine the probe beam with the image beam to form a combined beam, and an optical readout quantum well device in the optical path of the combined beam, which simultaneously passes in an optical readout beam an intensity level of at least one wavelength within the probe beam in the second selected bandwidth in proportion to an intensity level of at least one wavelength within the image beam in the first selected bandwidth; and a detector sensitive to light in the second selected bandwidth and not sensitive to light in the first selected bandwidth.

Abstract: A detector, system including a detector and method for sensing motion within a detection region. The detector has a detection element and a focusing element aiming received energy corresponding to a presence within the detection region toward the detection element. The focusing element has a plurality of sections in which each of the plurality of sections establishes a corresponding detection zone within the detection region. The plurality of sections are arranged to allow a motion vector to be determined for an object passing through the detection region. The system includes a detector that generates pulses each time presence in a detector zone is detected as well as a central alarm panel. The central alarm panel receives the pulses and has processor that evaluates the timing between electrical pulses to determine the motion vector.

Abstract: To process measurement data representing a subterranean structure, a derivative of the measurement data collected by at least one survey receiver is computed, with respect to frequency. A response representing the subterranean structure is then computed based on the derivative of the measurement data, where the response contains an air-wave component that has been suppressed due to computing the derivative of the measurement data relative to at least another component that is sensitive to the subterranean structure.