|
Match
|
Document |
Document Title |
|
|
7626169 |
Optical reference, and a method of using same
A detector calibration reference is disposed along a path of travel for radiation that extends from a radiation source to a radiation detector. The detector calibration reference has mutually...
|
|
|
7605370 |
Microspectrometer gas analyzer
A robust, compact spectrometer apparatus for determining respective concentrations or partial pressures of multiple gases in a gas sample with single as well as multiple and even overlapping,...
|
|
|
7598478 |
Image pickup device having a light shield element
An image pickup device wherein the range in the amount of incident light (dynamic range) for obtaining an appropriate image can be expanded, and shutter and aperture functions are provided. A light...
|
|
|
7485849 |
Light sensor protection and method for protecting a light sensor with laser radiation attenuating gas
A light sensor protection system and method protects a light sensor system from a laser threat. The light sensor system has a sensor housing which contains optical elements disposed within the...
|
|
|
7339170 |
Optical encoding and reconstruction
The invention features methods including: (i) modulating multiple components (e.g., different spatial regions, different wavelengths, or both) of electromagnetic (EM) radiation emerging from an...
|
|
|
7268352 |
Apparatus and method for determining the proportion of a substance in a gas sample using an infrared measuring instrument
The invention relates to an apparatus and a method for improved correction of drift in an infrared measuring instrument. The measurement signal furnished by a thermal detector is split into a...
|
|
|
7244937 |
Optical measurement apparatus with laser light source
An optical measurement apparatus operable with a test specimen has a light source with a laser having an output beam, and a beam splitter that splits the output beam of the laser into a first split...
|
|
|
7193214 |
Sensor having differential polarization and a network comprised of several such sensors
Parametric processing capability is added to a typical sensor so that a target object can be more clearly distinguished from the background clutter in a given scenery. A polarizer with several...
|
|
|
7166842 |
Gas sensor arrangement with reduced settling time
A gas sensor arrangement for detecting the presence or concentration of an analyte in a measuring gas comprises a gas measuring chamber having an inlet for receiving the measuring gas. A measuring...
|
|
|
7164131 |
High fidelity electrically calibrated pyroelectric radiometer
Using biased, electrical power feedback to an electrical heater, the output signal from a pyroelectric detector is made to follow the waveform of incident electromagnetic radiation. The feedback...
|
|
|
7157711 |
Microspectrometer gas analyzer
A robust, compact spectrometer apparatus for determining respective concentrations or partial pressures of multiple gases in a gas sample with single as well as multiple and even overlapping,...
|
|
|
7141793 |
Remove vehicle emission sensing device with single detector
A remote sensing device for determining at least one characteristic of a vehicle emission plume includes a radiation source, a detector, and a plurality of filters. Either the filters or the...
|
|
|
7092007 |
Vehicular forward-vision display system decreasing luminance with decreasing vehicle speed
A vehicular forward-vision display system includes a night-vision camera for scanning a nighttime image ahead of a vehicle and a head-up display for displaying the scanned nighttime image as a...
|
|
|
7091488 |
Uncooled optical imaging device
Optical sensors, more particularly infrared sensors, use an array of MEM micromirrors to chop a light beam impinging on an array of sensors of an imaging device to minimize the influence of thermal...
|
|
|
6995359 |
Miniature cryogenic shutter assembly
A calibration method for radiometric imaging systems that relies on an absolute measurement of scene radiance (thereby requiring a baseline measurement of zero radiance), and a shutter assembly for...
|
|
|
6813063 |
Exciton polariton optical switch
A waveguide having a periodic structure and the excitation of exciton polariton as one form of interactions between radiation fields and matter systems are applied to light switching to provide an...
|
|
|
6800856 |
Light sampling system
A light sampling system for sampling scattered light from mirrors in an optical switch. The system includes four basic components: an imaging lens, a multi-channel liquid crystal light valve...
|
|
|
6770882 |
Micromachined pyro-optical structure
This invention is a micromachined sensor pixel structure that can be fabricated either as a discrete sensor or in array form with application to thermal sensing of radiation receive from various...
|
|
|
6717148 |
Method and apparatus for measuring coating
The invention relates to a method and an apparatus for measuring a coating from paper or board. The measurement is carried out by one detector at different times or by two detectors simultaneously....
|
|
|
6707044 |
Infrared camera system
An IR camera comprises an IR Focal Plane Array having a number of detector elements as sensor devices, an optical system focusing an object onto the Focal Plane Array, and a signal processing...
|
|
|
6664553 |
Trap blackbody
An apparatus for simulating a blackbody utilizes several plates to absorb and reflect electromagnetic radiation. Electromagnetic radiation entering the apparatus from a certain view is reflected...
|
|
|
6586738 |
Electromagnetic radiation detectors having a micromachined electrostatic chopper device
The present invention provides for an improved electromagnetic radiation detector having a micromachined electrostatic chopping device. The MEMS flexible film chopping device provides reliability,...
|
|
|
6585410 |
Radiant temperature nulling radiometer
A self-calibrating nulling radiometer for non-contact temperature measurement of an object, such as a body of water, employs a black body source as a temperature reference, an optomechanical...
|
|
|
6580078 |
Ferroelectric liquid crystal infrared chopper
A liquid crystal infrared light chopper includes a polarizer that receives and polarizes incoming infrared light, a layer of ferroelectric liquid crystal material switchable between at least two...
|
|
|
6580064 |
Background rejection circuit
A background rejection circuit uses the harmonic content of an angularly narrow target to produce a signal. The signal is used to modulate an externally derived audio signal to produce a target...
|
|
|
6396060 |
System for detecting radiation in the presence of more intense background radiation
A system for sensitively discriminating against background radiation which tends to swamp and prevent detection of radiation from a source of interest such as IR (Infra-Red) light radiation as may...
|
|
|
6225630 |
Apparatus configured for identification of a material and method of identifying a material
The present invention relates to an apparatus configured for identification of a material and method of identifying a material. One embodiment of the present invention provides an apparatus...
|
|
|
6222190 |
Photo acoustic infrared (IR) detector
Photo acoustic infrared (IR) detector including a chamber for receiving a gas or gas mixture, a window for allowing pulsed or modulated IR radiation into the chamber, and a pressure sensor adapted...
|
|
|
6184529 |
Methods and apparatus for performing scene based uniformity correction in imaging systems
Methods and apparatus for generating uniform reference sources for use in calibrating multiple-detector imaging devices. In exemplary embodiments, a plano-plano reference lens is inserted at a...
|
|
|
6177674 |
Infrared radiation modulating device
A non-mechanical modulating device for use in infrared detection. The device is of particular use in the 8-14 μm range and has application in thermal imaging cameras and gas sensing systems. The...
|
|
|
6163026 |
Chemically stabilized light selective element for imaging applications
An imaging system having an imaging sensor providing sensor signals in response to incident light and control signals, control circuitry configured to generate control signals for controlling said...
|
|
|
6121617 |
Infrared gas analyzer
An infrared gas analyzer is formed of a source of infrared rays for emitting infrared flux; an infrared flux interrupting device for chopping the emitted infrared flux from the source of the...
|
|
|
6069359 |
Pyroelectric IR sensor
A pyroelectric IR sensor equipped with a chopper for opening and closing a shielding plate so that infrared rays emitted from an object are allowed to be incident onto a pyroelectric sensor unit...
|
|
|
6034371 |
Semi-opaque chopper for thermal imaging system and method
Thermal imaging chopper (22) having a frame (42) with an open window (47) and a covered window (48). The covered window (48) is preferably covered with a material that partially blocks a selected...
|
|
|
6028312 |
Electronic chopping
A sensor with radiation detectors with two or more photoconductor elements and bias polarity switching of one element to emulate mechanical chopping of input radiation. This electronic chopping...
|
|
|
5994701 |
Infrared sensor device with temperature correction function
A shutter 3 which can be momentarily held open and immediately closed, is disposed adjacent to an aperture stop 4 in an optical system, and a temperature sensor 5 is provided for measuring the...
|
|
|
5965890 |
Solid state infrared chopper
A chopper is provided of solid state construction. Two layers are provided adjacent one another with the area between the layers defining one or more diffusion zones. One or more voltage potentials...
|
|
|
5952661 |
Chopper for thermal imaging system and method
Thermal imaging chopper (20) may comprise a disk (40) formed of a thermally transmitting material. The disk (40) may include a structure (44) operable to randomly scatter thermal radiation of the...
|
|
|
5923036 |
Spatially-multiplexed imaging microscope
An infrared imaging microscope uses spatial encoding to divide an sample being examined into a plurality of pixel regions. The spatial encoding is provided by a digitally controlled mask, which is...
|
|
|
5867307 |
Blur film assembly for infrared optical applications
A blur film is made of a polymeric film material transmissive to infrared energy of a selected waveband, which is affixed to a surface of a substrate transmissive to energy of the same selected...
|
|
|
5818049 |
Infrared gas spectrometer having a lid assembly with an integrated chopper and chopper motor
A respiratory gas monitor for measuring the concentration of certain gases in a respiratory gas stream has a compact and unitary lid assembly having an integral low-profile motor and a cylindrical...
|
|
|
5811811 |
Environment monitor
A disc having a plurality of slits radially each of which have approximately the same width as a diameter of a photoreceptor of the sensor, and a rotary chopper, are arranged to coaxially rotate....
|
|
|
5796107 |
Infrared modulator
The invention provides an IR modulator for synchronized interruption of an IR beam path in a thermal imaging device. A layer made of thermorefractive material is arranged in the beam path, and...
|
|
|
5739535 |
Optical gas analyzer
An optical gas analyzer for measuring the percentage of components in a gas phase by IR absorption, containing a power source, a measuring path containing the gas sample, a photoelectric receiver...
|
|
|
5731583 |
Folded optical path gas analyzer with cylindrical chopper
The disclosed gas analyzer (10) provides two separate folded optical paths (16 and 18) from a single source (12) to a single detector array (14) via a polychromatic filter (26). One optical path...
|
|
|
5680135 |
Radiation communication system
An aircraft has an exhaust flame or plume which can be modulated to communicate. A sound emitter is mounted to the aircraft for emitting acoustic waves into the exhaust plume. An encoder will...
|
|
|
5659416 |
Thermometer for remote temperature measurements
An instrument is provided for measuring the temperature of an object from infrared radiation emitted by the object. The instrument includes a radiation detector, a temperature indicating device...
|
|
|
5640015 |
Pyrometer electromagnetic radiation measuring device
A pyrometer for measuring the electromagnetic radiation emitted by an object comprises a first detector to which the radiation is delivered through an optical system as well as a second detector to...
|
|
|
5572031 |
Pressure- and temperature-compensating oxygen sensor
RF modulation spectroscopy of a near-infrared tunable laser diode source is used to determine the oxygen concentration in a sample medium. A reference cell containing a known concentration of...
|
|
|
5528391 |
Infrared beam steering system using diffused infrared light and liquid crystal apertures
A system for scanning a room to find the location of target devices, and then locking onto them with stationary directed beams for two-way communication. In one embodiment, a base system in each...
|