1327 results about "Responsivity" patented technology

Low cost millimeter wave imagers using two-dimensional focal plane arrays based on backward tunneling diode (BTD) detectors. Two-dimensional focal arrays of BTD detectors are used as focal plane arrays in imagers. High responsivity of BTD detectors near zero bias results in low noise detectors that alleviate the need for expensive and heat generating low noise amplifiers or Dicke switches in the imager. BTD detectors are installed on a printed circuit board using flip chip packaging technology and horn antennas direct the waves toward the flip chip including the BTD detectors. The assembly of the horn antennas, flip chips, printed circuit board substrate, and interconnects together work as an imaging sensor. Corrugated surfaces of the components prevent re-radiation of the incident waves.

A macro pixel is provided. The macro pixel includes at least two color pixel elements. Each color pixel element includes a photoreceptor that in response to receiving light, generates an output signal that is indicative of the quantity of light photons of a color are received. Each of the color pixel elements are configured to receive a corresponding color. The photoreceptor of each color pixel element has a geometry and a responsivity to light that is a function of the geometry of the photoreceptor such that the responsivity of the output signal of the photoreceptor to the corresponding color is controllable by changing the geometry. The geometries of the photoreceptors are selected so that a predetermined relative sensitivity to each color is obtained

The present invention provides a horizontal linear vibrator which can reduce the thickness but increase the strength of vibrations while at the same time guaranteeing a sufficiently long lifetime and satisfactory responsivity. The horizontal linear vibrator includes a casing, a bracket, a vibration unit, a cylindrical coil and springs. The bracket is coupled to the casing to form an internal space. The vibration unit includes a weight, a pair of yokes and magnets. The weight has an opening therein. The yokes are disposed on the inner surfaces of the weight. The magnets are provided in the yokes such that different poles of the magnets face each other. The cylindrical coil is perpendicularly mounted to the bracket and disposed in space between the pair of yoke. The springs are coupled to both ends of the casing or the bracket. The springs elastically support the vibration unit to allow the vibration unit to vibrate in the horizontal direction.

An air conditioner capable of enhancing responsivity of a blowout temperature of conditioned air while preventing occurrence of an overshoot or undershoot condition of the blowout temperature when a user gives an instruction to change the blowout temperature in a dehumidifying operation mode. In a control state, if a set temperature level is adjusted to increase a blowout temperature of conditioned air by increasing the target condenser outlet temperature, the rotating speed of the refrigerant compressor is increased, while the restriction opening of the heating expansion valve is maintained. Thus, the condenser outlet temperature is regulated to the target temperature with minimal undershoot or overshoot of the target temperature.

In one aspect, the present invention provides a silicon photodetector having a surface layer that is doped with sulfur inclusions with an average concentration in a range of about 0.5 atom percent to about 1.5 atom percent. The surface layer forms a diode junction with an underlying portion of the substrate. A plurality of electrical contacts allow application of a reverse bias voltage to the junction in order to facilitate generation of an electrical signal, e.g., a photocurrent, in response to irradiation of the surface layer. The photodetector exhibits a responsivity greater than about 1 A / W for incident wavelengths in a range of about 250 nm to about 1050 nm, and a responsivity greater than about 0.1 A / W for longer wavelengths, e.g., up to about 3.5 microns.

The present invention provides a horizontal linear vibrator which can reduce the thickness but increase the strength of vibrations while at the same time guaranteeing a sufficiently long lifetime and satisfactory responsivity. The horizontal linear vibrator includes a casing, a bracket, a vibration unit and springs. The casing defines an internal space therein. A first magnet is attached to an upper plate of the casing. The bracket is coupled to the lower end of the casing. The second magnet is attached to the bracket such that different poles of the first and second magnets face each other. The vibration unit has a weight, and a cylindrical coil which is provided in or under the weight. The springs are coupled to the sidewall plates of the casing or the bracket. The springs elastically support the vibration unit to allow the vibration unit to vibrate in the horizontal direction.

An engine control device capable of improving engine efficiency by operating the engine in an area where fuel consumption is small (good) while allowing high responsivity of the engine to be maintained. The object can be achieved by operating to match at a point on a target torque line of a torque diagram and operating an electric motor when a matching point moves on the target torque line in a direction in which a load applied to the engine output shaft becomes large.

A surface-tracking measuring machine is provided, in which measurement range is enlarged while keeping a measuring force, responsivity, resolution thereof. For the object, the surface-tracking measuring machine has a frame (10), a probe (11) swingably supported by the frame (10) and having a tracer (15) at an end thereof, a measuring force controller (21) for controlling the measuring force applied to the probe, a displacement detector (31) for detecting a displacement of the probe, a measuring force detector (41) for detecting the measuring force applied to the probe, and a controller (51) for comparing a measuring force detected value detected by the measuring force detector and a previously commanded measuring force command value and to control the measuring force controller so that the measuring force detected value is equal to the measuring force command value.

An integrated color pixel (ICP) with at least one integrated metal filter is presented. Rather than utilizing a separate color filter, the wavelength responsivity of the ICP is specified and integrated at pixel level into the ICP itself using metal materials already available for standard integrated circuit design and fabrication process. The ICP of the present invention is thus distinguished from a conventional color pixel constructed in a two-stage process that combines an image sensor with a color filter array or other optical material.

The invention discloses a magnetic composite nano microsphere capable of emitting fluorescent light and a preparation method thereof, which belong to the inorganic nanophase material field. The preparation method comprises the following steps: firstly, the sol-gel method or the reversed phase microemulsion method is adopted for performing base catalysis on alkyl silicate, and a layer of silicon dioxide is uniformly coated on the surface of inorganic magnetic nano particles; secondly, an amino silane coupling agent is adopted for performing surface finish on silicone dioxide; thirdly, semiconductor quantum dots are absorbed on the surface of the silicone dioxide through the electrostatic action between an amino group and a carboxyl group on the surface of the amino silane coupling agent; and fourthly, the magnetic composite nano microsphere with a core-shell structure capable of emitting the fluorescent light is obtained. The preparation method has easy obtained raw materials and low cost. The composite nano microsphere obtained has good stability, controllable grain size, narrow distribution, and has good magnetic responsivity and performance of being capable of emitting the fluorescent light, and the two performances are controllable. The magnetic composite nano microsphere and the preparation method can be applied in the fields of biomedicine, bioengineering, etc. including immunoassay, biological labeling and separation, cell imaging and so on.

An illumination device and method is provided herein for calibrating individual LEDs and photodetector(s) included within the illumination device, so as to obtain a desired luminous flux and a desired chromaticity of the device over time as the LEDs age. Specifically, a calibration method is provided herein for characterizing each emission LED and each photodetector separately. The wavelength and intensity of the illumination produced by each emission LED is accurately characterized over a plurality of different drive currents and ambient temperatures, and at least a subset of the wavelength and intensity measurement values are stored with a storage medium of the illumination device for each emission LED. The responsivity of the photodetector is accurately characterized over emitter wavelength and photodetector junction temperature, and results of said characterization are stored with the storage medium.

The invention discloses an imaging spectrometer absolute radiation calibration method and belongs to the field of optical metrological testing. The method utilizes a high-stability radiation source combination imaging system, a beam-splitting system and an integrating sphere to generate uniform monocolor radiation through a heavy-caliber parallel collimator to form collimated radiation to be received by a standard radiometer with a precise diaphragm and a measured imaging spectrometer, spectral radiant luminance on an entrance pupil face of the measured imaging spectrometer is calibrated by the standard radiometer, and full wavelength absolute radiation calibration of the imaging spectrometer can be realized. The imaging spectrometer absolute radiation calibration method solves the problem of absolute radiation calibration of current imaging spectrometers, measuring of responsivity uniformity of the imaging spectrometer can also be realized, and the imaging spectrometer absolute radiation calibration method has the advantages of high calibration accuracy and wide application prospect.

This invention comprises plurality of edge illuminated photodiodes. More specifically, the photodiodes of the present invention comprise novel structures designed to minimize reductions in responsivity due to edge surface recombination and improve quantum efficiency. The novel structures include, but are not limited to, angled facets, textured surface regions, and appropriately doped edge regions.

The invention provides an infrared detector of a microbridge structure and a method for manufacturing the infrared detector of the microbridge structure. The detector comprises a reading circuit substrate, a microbridge leg, a heat sensitive layer, an infrared reflection layer and an infrared absorption layer. The infrared absorption layer is supported by and arranged above the heat sensitive layer, a resonant cavity for incoming infrared light is formed by the infrared absorption layer and the infrared reflection layer, and the microbridge leg is arranged below the infrared reflection layer and electrically connected with the reading circuit substrate. Through the structure, the infrared absorptivity of the device can be improved while thermal conductance of the device can be reduced, the filling rate of the device is improved, the defects of the resonant cavity are overcome, and thus the thermal isolation effect and the responsivity of the device are improved and the performance of the device is optimized.

The invention requests to protect an infrared focal plane array blind pixel detection method based on integral time adjustment, belongs to the technical field of signal detection. Aiming at the condition limitation that the traditional blind pixel detection method based on a standard black body radiation source depends on an expensive black body and a fixed dark room and the blind pixel detectioncannot be performed as required anytime anywhere, the invention provides a method of flexibly and conveniently adjusting a response output value of the infrared focal plane array in different integral time through a CPLD (complex programmable logic device) programming, computing a response rate of each detection unit according to the response output value and detecting the blind pixel according to the blind pixel definition. The detection unit response output value, the blind pixel detection and the blink pixel compensation in different integral time are recorded. The method provided by the invention has a simple implementation process, and has application and spread value in the IRFPA (infrared focal plane array) blind pixel detection.

Disclosed is a low-cost deformation sensor which is light-weighted and flexible. The deformation sensor stably operates with high responsivity in the air. Specifically disclosed is a deformation sensor (6) which is a sheet composed of a nonaqueous polymer solid electrolyte (10) and at least a pair of electrodes (7, 8) sandwiching the nonaqueous polymer solid electrolyte (10). The nonaqueous polymer solid electrolyte (10) contains a polymer component which is selected from at least either of a polymer containing a monomer unit having a heteroatom and a block copolymer containing a block of the polymer, and an ionic liquid. The sensor generates an electromotive force when deformed, and is able to sense the position of deformation and the pressure distribution.

A thermal infrared (IR) imaging system and associated calibration methods are described. In various illustrative embodiments, techniques are provided for the stabilization and radiometric calibration of a thermal IR imager without stabilization of the device's focal-plane-array (FPA) temperature. In one embodiment, a scene image is corrected for FPA temperature to produce a FPA-temperature-stabilized image, to which radiometric calibration can optionally be added through additional calculations and prior device characterization. In another embodiment, the internal shutter of the thermal IR imager is used as an equivalent external blackbody source to cancel the FPA-temperature-dependent offset from a scene image Radiometric calibration can be included through additional calculations and prior device characterization. In some embodiments, these techniques are combined to correct for dependence on FPA temperature of both the imager's responsivity and its zero-radiance-scene offset.

A method and system for maintaining uniformity in a FLIR display. During a one-time initialization procedure, a plurality of dynamic ranges are defined by covering a specific range of bucket fill levels when in a certain gain. To cover all dynamic ranges possible, a plurality of pairs of responsivity equalization (RE) calibrations (each pair producing a RE set of pixel gain corrections) are also accomplished in the same one time initialization period. A plurality of corresponding level equalization (LE) calibrations (each using the appropriate calibrated RE set and producing a LE set of pixel level corrections) for each anticipated dynamic range are made at every power-up initialization. Each of the calibrations is done with respect to a thermal reference source to produce a uniform scene at the desired bucket fill level. An algorithm is employed which forces the two bucket fill points defined during the responsivity calibration to span as far as possible the dynamic range and forces the level equalization bucket fill point to fall within the two bucket fill points of the responsivity calibration. Then, during an operational time period, the scene and optics temperatures are monitored, and if the average bucket fill value exceeds the bucket fill range of the present dynamic range, the presently selected dynamic range is changed to a second dynamic range (gain is changed along with the RE set and LE set). The dynamic ranges are designed to overlap so that a hysteresis effect is achieved. The pre-calibrations and automatic dynamic range switching prevent saturation and create the best uniformity (lowest fix pattern noise) possible while allowing for continuous operation of the FLIR system, thus eliminating the interruption caused by the prior art touch-up calibration procedure.

Electromagnetic radiation detection systems and associated methods are provided. In one aspect, for example, an electromagnetic radiation detection system includes a semiconductor material operable to detect electromagnetic radiation, the semiconductor material having a responsivity of greater than or equal to 0.3 A / W at an operating voltage of less than or equal to about 50 volts and at a wavelength of from about 0.01 nm to about 100 nm. The system can further include an electromagnetic radiation source positioned to deliver electromagnetic radiation to the semiconductor material.

This invention comprises plurality of edge illuminated photodiodes. More specifically, the photodiodes of the present invention comprise novel structures designed to minimize reductions in responsivity due to edge surface recombination and improve quantum efficiency. The novel structures include, but are not limited to, angled facets, textured surface regions, and appropriately doped edge regions.

The present invention provides a horizontal linear vibrator which can reduce the thickness but increase vibration strength while at the same time guaranteeing a sufficiently long lifetime and satisfactory responsivity. The horizontal linear vibrator includes a casing, a bracket, a vibration unit and springs. The casing defines an internal space therein. The bracket is disposed under the casing. A cylindrical coil is provided on the bracket. The vibration unit has a magnet, a yoke and a weight. The yoke contains the magnet therein and is open on the lower end thereof. The weight is coupled to the outer surface of the yoke. The springs are coupled to sidewall plates of the casing or the bracket. The springs elastically support the vibration unit to allow the vibration unit to vibrate in the horizontal direction.

An integrative control method and device for controlling gas engines is proposed which load responsivity of the engine is improved while maintaining air fuel ratio control and stable control is performed when fuel gas of different calorific value is used. The control method comprises a speed control process for controlling engine rotation speed by controlling the fuel gas flow control valve based on deviation of actual engine rotation speed from a target command value of rotation speed, and an air fuel ratio control process for controlling air fuel ratio of fuel-air mixture by controlling throttle valve opening based on deviation of the actual mixture flow rate from the command value of mixture flow rate, whereby correction of theoretical air fuel ratio in accordance with exhaust temperature is performed in the air fuel ratio control process, the correction being done to correct the theoretical air fuel ratio used to calculate the command value of fuel-air mixture flow rate in accordance with exhaust temperature based on deviation of actual exhaust temperature from target exhaust temperature prescribed for various engine rotation speeds and load factors.

The present invention provides a horizontal linear vibrator which can increase vibration strength while at the same time guaranteeing a sufficiently long lifetime and satisfactory responsivity. The horizontal linear vibrator includes a casing, a bracket, a vibration unit and springs. The bracket and the casing form the internal space therein. A coil is provided above the bracket such that the center axis thereof is oriented in a horizontal direction. The vibration unit is disposed through the coil and comprises a magnetic field generating unit and a weight. The magnetic field generating unit includes a magnet assembly and a yoke. The magnet assembly has magnets which are provided on opposite sides of a magnetic body core such that the similar magnetic poles of the magnets face each other. The weight is mounted to the magnetic field generating unit. The springs are coupled to the casing or the bracket and elastically support the vibration unit.

The present invention provides a front-illuminated avalanche photodiode (APD) with improved intrinsic responsivity, as well as a method of fabricating such a front-illuminated APD. The front-illuminated APD comprises an APD body of semiconductor material, which includes a substrate and a layer stack disposed on a front surface of the substrate. The layer stack includes an absorption layer, a multiplication layer, and a field-control layer. Advantageously, a back surface of the APD body is mechanically and chemically polished, and a reflector having a reflectance of greater than 90% at the absorption wavelength band is disposed on the back surface of the APD body. Thus, incident light that is not absorbed in a first pass through the absorption layer is reflected by the reflector for a second pass through the absorption layer, increasing the intrinsic responsivity of the front-illuminated APD.

A radiation sensor includes an integrated circuit radiation sensor chip (1A) including first (7) and second (8) thermopile junctions connected in series to form a thermopile (7,8) within a dielectric stack (3). The first thermopile junction (7) is insulated from a substrate (2) of the chip. A resistive heater (6) in the dielectric stack for heating the first thermopile junction is coupled to a calibration circuit (67) for calibrating responsivity of the thermopile (7,8). The calibration circuit causes a current flow in the heater and multiplies the current by a resulting voltage across the heater to determine power dissipation. A resulting thermoelectric voltage (Vout) of the thermopile (7,8) is divided by the power to provide the responsivity of the sensor.

A fiber-pigtailed assembly for an optical detector with low back reflection and minimal polarization-dependent responsivity has a detector surface mounted adjacent a beveled end of a fiber pigtail such that the detector surface is tilted and rotated with respect to the beveled end of the fiber pigtail. Also an external optical fiber may be coupled to the fiber pigtail with low back reflection and minimal polarization-dependent responsivity by having an input ferrule at the end of the external optical fiber, the end being beveled; by having an intermediate ferrule at a coupling end of the fiber pigtail, the coupling end being beveled while the other end of the ferrule is beveled by the same amount but approximately orthogonal to the coupling end; and by having an output ferrule on the fiber pigtail adjacent to the intermediate ferrule, the end of the output ferrule adjacent to the intermediate ferrule being beveled. The ferrules are maintained in position so that the beveled ends of the intermediate ferrule are parallel to the corresponding beveled ends of the input and output ferrules and there is a gap between the input and intermediate ferrules. The beveled ends of the ferrules at both the coupler and detector ends of the fiber pigtail introduce fixed amounts of polarization-dependent responsivity while reducing back reflection, while the tilt of the detector surface at the detector end and the opposite approximately orthogonal bevel of the intermediate ferrule at the coupler end compensate and essentially eliminate such polarization-dependent responsivity.