585 results about "Short wave infrared" patented technology

The invention discloses a method for monitoring farmland drought, which comprises obtaining soil or leaf water content of an observing point which is arranged on monitoring ground surface, building a functional relation between soil or leaf water content of the observing point and a corresponding index of characterized farmland drought condition, taking remote sensing data into the functional relation, and obtaining the soil or leaf water content of the monitoring ground surface, wherein the corresponding index of characterized ground surface drought condition is defined according to following methods: Firstly, the farmland ground surface whose vegetation coverage< =15% adopts a vertical drought index, secondly, the farmland ground surface whose vegetation coverage>15% and <= 65% adopts a vegetation conditions albedo drought index, and thirdly, the farmland ground surface whose vegetation coverage>65% to 100% adopts at least one of three following indexes: a short wave infrared vertical water loss index, a vegetation water content index, and a vegetation water deficit index. The ground surface drought monitoring method of the invention is applied for drought testing farmland ground surface with different vegetation coverage degrees.

Apparatus and methods for rapidly detecting, localizing, imaging, and quantifying leaks of natural gas and other hydrocarbon and greenhouse gases. Scanning sensors, scan patterns, and data processing algorithms enable monitoring a site to rapidly detect, localize, image, and quantify amounts and rates of hydrocarbon leaks. Multispectral short-wave infrared detectors sense non-thermal infrared radiation from natural solar or artificial illumination sources by differential absorption spectroscopy. A multispectral sensor is scanned to envelop an area of interest, detect the presence and location of a leak, and raster scan the area around the leak to create an image of the leak. The resulting absorption image related to differential spectral optical depth is color mapped to render the degree of gas absorption across the scene. Analysis of this optical depth image, with factors including known inline pressures and / or surface wind speed measurements, enable estimation of the leak rate, i.e., emission mass flux of gas.

Apparatus and methods for rapidly detecting, localizing, imaging, and quantifying leaks of natural gas and other hydrocarbon and greenhouse gases. Scanning sensors, scan patterns, and data processing algorithms enable monitoring a site to rapidly detect, localize, image, and quantify amounts and rates of hydrocarbon leaks. Multispectral short-wave infrared detectors sense non-thermal infrared radiation from natural solar or artificial illumination sources by differential absorption spectroscopy. A multispectral sensor is scanned to envelop an area of interest, detect the presence and location of a leak, and raster scan the area around the leak to create an image of the leak. The resulting absorption image related to differential spectral optical depth is color mapped to render the degree of gas absorption across the scene. Analysis of this optical depth image, with factors including known inline pressures and / or surface wind speed measurements, enable estimation of the leak rate, i.e., emission mass flux of gas.

The invention discloses a catadioptric hybrid multispectral imaging system, which comprises a primary mirror, a catadioptric dual-purpose secondary mirror, a wedge-shaped dichroic beam splitter, a medium wave or long wave infrared or medium-long wave infrared dual-waveband imaging mirror assembly, a medium wave or long wave infrared or medium-long wave infrared dichroic detector unit, a visible to near infrared waveband imaging mirror assembly, a visible to near infrared waveband beam splitting device and a detection unit thereof, a short wave infrared waveband imaging mirror assembly, and a short wave infrared waveband beam splitting device and a detection unit thereof, wherein a hole is formed at the center of the primary mirror, and the reflecting surface of the primary mirror is a concave surface; and the incident surface of the catadioptric dual-purpose secondary mirror is a convex surface. The system can realize imaging with common field of view and common aperture of a same object, improve the utilization rate of light energy, save space for the beam splitter and the system, prevent parasitic light from directly leaking into the imaging mirror assembly from the hole formed on the primary mirror, correct asymmetric aberration, be more conductive to realizing large aperture and the larger field of view and significantly improve the imaging quality. The imaging with the same optical axis and the common field of view can enable an image to be easy to register.

An aiming device is configured to generate an infrared cross on a target. The cross having a principal wavelength above the wavelength detectable by image intensification night vision devices. A night vision system having a short wave infrared detector includes an illuminator having a principal wavelength above the wavelength detectable by image intensification night vision devices. A beacon is configured to generate light at a wavelength above which can be scene with image intensification night vision devices.

The invention relates to a multielement remote sensing information coordinated snow cover parameter inversion method. The normalized vegetation / snow cover indexes are calculated by utilizing a green ray waveband and short wave infrared of two data sources Terra and Aqua and are combined with a near-infrared band and the green ray waveband to obtain a snow cover inversion result at an initial stage, multi-temporal coordinated cloud removing processing is carried out on the snow cover inversion result, and coordinated multi-temporal microwave data generate a final snow cover inversion product; the snow depth is inversed by utilizing passive microwave data, the snow depth which is greater than 5cm is taken as an effective value and is combined with a microwave snow cover classification chart for performing multi-temporal coordination, the snow depth which is smaller than or equal to 5cm is taken as pixel values which are expressed by an optical data inversion result and is combined with an optical snow cover classification chart for improving the inversion precision, and the microwave inversion result and the optical inversion result are coordinated for generating a final snow depth inversion product. The multielement remote sensing information coordinated snow cover parameter inversion method has the beneficial effects that the precision and the integrity of snow cover parameter inversion are high, and for inversion of the snow depth which is smaller than or equal to 5cm, an optical data inversion formula is invented, so that the method makes up the blank of inversion in a shallow snow area.

A combination thermal and visual image capturing device used to capture real time thermal and visual images of surface and subsurface biological tissue, said device comprising: a power source, said power source functionally connected to said device; a housing, a long wave infrared microbolometer, said microbolometer functionally connected to said power source a digital camera; a short wave infrared microbolometer, said microbolometer functionally connected to said power source; a digital camera, said digital camera functionally connected to said power source; and a digital camera, said digital camera functionally connected to said power source, wherein said digital camera and 3D camera are contained within a USB peripheral device; said imaging apparatus further comprising means to electronically provide combined thermal image information from the microbolometers and visual image information from said digital camera and said 3D camera to another electronic device.

A system and method for using near-infrared or short-wave infrared (SWIR) light sources for identification of counterfeit drugs may perform spectroscopy using a super-continuum laser to provide detection in a non-contact and non-destructive manner at stand-off or remote distances with minimal sample preparation. Also, near-infrared or SWIR light may penetrate through plastic containers and packaging, permitting on-line inspection and rapid scanning. The near-infrared or SWIR spectroscopy may also be used to detect illicit drugs and their chemical composition. Moreover, the spectroscopic techniques may also be applied to quality assessment and control in pharmaceutical manufacturing, thus permitting the implementation of smart manufacturing with feedback control. Fiber super-continuum lasers may emit light in the near-infrared or SWIR between approximately 1.4-1.8 microns, 2-2.5 microns, 1.4-2.4 microns, 1-1.8 microns. In particular embodiments, the detection system may be a dispersive spectrometer, a Fourier transform infrared spectrometer, or a hyper-spectral imaging detector or camera.

A system and method for identifying an unknown substance in a sample comprising multiple entities. A method may comprise generating a RGB image representative of a sample and assessing said RGB image to identify at least one region of interest. This region of interest may he assessed to generate a spatially accurate wavelength resolved image, which may be a hyperspectral image. This spatially accurate wavelength resolved image may comprise a fluorescence, Raman, near infrared, short wave infrared, mid wave infrared and / or long wave infrared image. This spatially accurate wavelength resolved image may be assessed to identify said unknown substance. A system may comprise: a reference database, a first detector for generating an RGB image, a second detector for generating a spatially accurate wavelength resolved image, and a means for assessing said RGB image and said spatially accurate wavelength resolved image.

A surveillance planning and analysis tool kit for planning and analysis at a region. The tool kit includes a computer system programmed with software adapted to simulate optical and imaging parameters at the region including a realistic geo-spatial map of the region, a number of surveillance cameras, camera specifications and lighting conditions. Preferred embodiments include computer software to permit planning and analysis of optical imaging technologies in the 400 nm-1700 nm spectrum that comprises the visible, near infrared, and short wave infrared where the primary signal is ambient light reflected from objects.

The invention discloses a multi-aperture multi-band high-resolution-ratio imaging device and method. The device comprises a Cassegrain optical system and a multi-aperture multi-band imaging device. The Cassegrain optical system is composed of a primary mirror of a Cassegrain telescope and a secondary mirror of the Cassegrain telescope. The multi-aperture multi-band imaging device comprise a square visible light CCD detector array, a square short wave infrared CCD detector array, a square medium wave infrared CCD detector array, a square long wave infrared CCD detector array, four lenses corresponding to visible lights, short wave infrared rays, medium wave infrared rays and long wave infrared rays, a focal plane coding module and a light insulation baffle, wherein the four CCD detector arrays are equal in size. The multi-aperture multi-band high-resolution-ratio imaging device and method overcome the difficulties encountered when a single-band infrared image is used for detecting a small target in the prior art, and reduce the false alarm probability in small target detection. The multi-aperture multi-band high-resolution-ratio imaging device and method have the advantages of having ultrahigh-resolution-ratio imaging capacity and saving imaging pixels and effectively overcome the common defect that the field of view is small.