TELOPS Articles & Applications Notes

  1. FAST Thermal Imaging – Tank/Artillery Muzzle Flash Analysis

    Typical large caliber muzzle flash last less than 0.2 seconds in the MW (3μm to 5μm) band. This fact leads to the most important technological challenge when it comes to the detection and characterization of short, millisecond long events: high frame rate.

  2. Urban Heat Island Characterization With Airborne Thermal Infrared Hyperspectral Imaging

    This application note discusses how to efficiently characterize urban heat islands using airborne TIR hyperspectral imaging, and to better understand their relationship with man-made materials.

  3. Time-Resolved Multispectral Imaging Of Combustion Reactions

    Most combustion gases selectively absorb/emit infrared radiation over a very narrow spectral range, so spectral filters are used to estimate these parameters and provide selectivity of the combustion gases’ chemical nature. Telops developed a time-resolved multispectral to characterize combustion experiments, and measure temperature profiles. This application note illustrates how the Telops’ MS-IR MW was used to calculate the combustion profile of a lit candle.

  4. Standoff Midwave Infrared Hyperspectral Imaging Of Ship Plumes

    Characterization of ship plumes is very challenging due to the great variety of ships, fuel, and fuel grades, as well as the extent of a gas plume. In this work, imaging of ship plumes from an operating ferry boat was carried out using standoff midwave (3-5 m) infrared hyperspectral imaging. Quantitative chemical imaging of combustion gases was achieved by fitting a radiative transfer model. Combustion efficiency maps and mass flow rates are presented for carbon monoxide (CO) and carbon dioxide (CO2). The results illustrate how valuable information about the combustion process of a ship engine can be successfully obtained using passive hyperspectral remote sensing imaging.

  5. Airborne Thermal Infrared Hyperspectral Imaging For Mineral Mapping

    In order to illustrate the benefits of thermal infrared hyperspectral imaging (HSI) for mineral mapping, an airborne survey was carried out over an open-pit mine in the Thetford Mines (Qc, Canada) area. The results show how high spectral resolution data facilitates temperature emissivity separation (TES) and atmospheric correction in order to retrieve a thermodynamic temperature map of the area and its associated spectral emissivity datacube. Mineral mapping of various minerals such as lizardite, serpentinite, and quartz was achieved through linear unmixing of the emissivity data using reference emissivity curves found in spectral libraries. The results illustrate the potential of TIR HSI for airborne mapping of silicate minerals.

  6. Thermal Infrared Multispectral Imaging Of Minerals

    For years, scientists have used thermal broadband cameras to perform target characterization in the longwave (LWIR, 8-12 µm) and midwave (MWIR, 3-5 µm) infrared. The analysis of broadband imaging sequences typically provides energy, morphological and/or spatiotemporal information.

  7. Time-Resolved Infrared Multispectral Imaging of Gases

    This application note discusses how Telops improved on the nature of gaseous studies through developing a multispectral imaging system that allows 8-channel synchronized acquisition at high frame rates.

  8. Airborne Midwave Infrared Mapping For Environmental Monitoring Applications

    Gas emissions from industrial plants located near residential areas can seriously impact the quality of life in these neighbourhoods. Airborne infrared hyperspectral imaging, in the midwave spectral range (3-5 um), was carried out over different operating plants in order to characterize the gas plume coverage as well as the chemical nature of emission constituents. Water vapor (H2O) was discriminated from an aerosol cloud formed upon condensation of the water vapor in the gas emissions coming from a waste incinerator and a paper mill. Quantitative chemical imaging of carbon monoxide (CO) and carbonyl sulfide (OCS) gas, emitted from an aluminum smelter plant, was successfully carried out illustrating the versatility of this technique for environmental monitoring applications.

  9. How To Increase Production Rate Without Compromising Product Quality

    For most world-leading manufacturers, product defects and low quality are unacceptable. Deployment of infrared vision systems is among the most efficient and promising solutions to quickly identify manufacturing defects on the production line and to immediately sort and reject faulty materials. The real-time inspection of goods using modern high-speed infrared imaging systems is not only limited to finding defects, but  it also provides key information pertaining to the output quality from automated assembly and production systems. Because of their great sensitivity (down to few mK), high-speed infrared cameras now allow for real-time detection of defects and trending with unprecedented efficiency. By Frederick Marcotte, Telops Inc.

  10. Airborne Detection of Chemical Powders Using Infrared Hyperspectral Imaging

    Applications involving maritime surveillance, border protection, homeland security, and command and control typically use airborne surveillance to detect various types of targets in order to determine shapes, temperatures, or chemical nature.