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  • Infrared Radiation and Radiometry Introduction
    All solid bodies that have temperatures above absolute zero (0 Kelvin, -273°C) emit electromagnetic waves. The thermal radiation portion of this energy is called infrared radiation. Wien's Displacement Law describes the relationship between a solid body's temperature and its emitting peak
  • Know Your Emissivity
    The material emissivity (written as "e" or "e") is the relative power of its surface to emit heat by radiation. Materials are assigned an emissivity value between 0 and 1.0. Emissivity is a measure of a material's ability to emit infrared energy. The emissivity of a surface is the ratio
  • Emissivity of Most Common Materials
    Emissivity is the measure of an object's ability to emit infrared energy. Emitted energy indicates the temperature of the object. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic, painted, or oxidized surfaces have emissivity values close to 0.95. Majority
  • Introduction to Thermopile Detectors
    and do not emit any radiation. Our detector's spectral absorption is flat from the ultraviolet to the far infrared. Spectral sensitivity is defined by the selection of optical band-pass filters. Thermopile output is generally in the micro-Volt to milli-Volt range depending on target size, temperature
  • The Importance of IR Thermography in Building-Science and the Conservation of Energy in the Residential Sector
    and measure temperature variations in your home. All materials on earth emit heat energy in the portion of the energy spectrum, but the human eye cannot see this energy. An infrared camera not only records infrared images but also accurately measures the temperature variations of building materials
  • Local Temperature Rises Caused by the Use of Commercial Mobile Phones
    Hand-held mobile phones emit electromagnetic radiation and can therefore cause local heating of biological tissues, e.g., in the regions of the human head normally covered by these phones. The goal of this paper is to visualize, quantify, and compare these thermal effects in various subjects using
  • Selected Critical Applications for Thermography: Convections in Fluids, Selective Emitters and Highly Reflecting Materials
    emitters, in that they do not emit IR radiation selectively, and that the emissivities do not exhibit wavelength dependence in the thermal infrared spectral region. If these requirements are fulfilled, it is quite easy to analyze the IR images with high accuracy. However, there is a growing number