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  • About Infrared Thermography
    Thermography is the use of an infrared imaging and measurement camera to "see" and "measure" thermal energy emitted from an object. Thermal, or infrared energy, is light that is not visible because its wavelength is too long to be detected by the human eye; it's the part of the electromagnetic
  • 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
  • Light Sensors
    Light sensors often use an infrared LED as a light source. Infrared LEDs have a greater intensity than LEDs that emit visible light. And when infrared photodiodes are used the sensors are relatively insensitive to ambient light. Photoelectric light sources are often modulated at a given frequency
  • What is Thermography?
    that are very hot (such as the Sun) emit thermal radiation viewable within multiple parts of the EM spectrum such as the "visible", the "ultraviolet" (UV) and the "infrared" areas.
  • 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
  • Engineering Aspects of Radiation Theory (.pdf)
    All bodies above zero temperature (-273°C) emit infrared radiation in the form of waves which pass through space and are partly absorbed by bodies they strike. This radiation forms a part of the electromagnetic spectrum and has the strongest heating effect of all. The nature of the radiation
  • 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
  • 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
  • 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
  • Wired 9.08: Beam On
    The wavelength of a laser beam depends on the type of atom or compound used in the chip. Ordinary laser pointers have a chip containing aluminum gallium arsenide phosphide, and emit a red beam at a wavelength of 670 nanometers. The reactive substance in a conventional pump laser is gallium indium