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Encyclopedia > Infrared detector

An infrared detector is a detector that reacts to infrared (IR) radiation. Most types of IR detectors give an electrical signal as output. In general, something that reacts to stimuli in a set manner, and is either part of a living being, or made by a living being, for the purpose of doing such reacting. ... Image of a small dog taken in mid-infrared (thermal) light (false color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of microwave radiation. ... Radiation has a variety of different meanings. ...


Some detectors can be used as bolometers and thermopiles, or as arrays of microbolometers or photodiodes for infrared cameras and thermal imaging. A bolometer is a device for measuring incident electromagnetic radiation. ... Battle between persian and greece forces took place at Thermoopile ... A Microbolometer is a specific type of bolometer used as a detector in a thermal camera. ... A photodiode A photodiode is an electronic component and a type of photodetector. ... An infrared camera, or a thermographic camera, is a device that forms an image using infrared radiation, similar to a common camera that forms an image using visible light. ... Thermography can refer to a printing process and a imaging process. ...


Types

Type Spectral range (μm)
Indium gallium arsenide (InGaAs) photodiodes 0.7-2.6
Germanium photodiodes 0.8-1.7
Lead sulfide (PbS) photoconductive detectors 1-3.2
Lead selenide (PbSe) photoconductive detectors 1.5-5.2
Indium arsenide (InAs) photovoltaic detectors 1-3.8
Platinum silicide (PtSi) photovoltaic detectors 1-5
Indium antimonide (InSb) photoconductive detectors 1-6.7
Indium antimonide (InSb) photodiode detectors 1-5.5
Mercury cadmium telluride (MCT, HgCdTe) photoconductive detectors 2-25
Mercury zinc telluride (MZT, HgZnTe) photoconductive detectors  ?

Indium gallium arsenide (InGaAs) is a semiconductor composed of indium, gallium and arsenic. ... General Name, Symbol, Number germanium, Ge, 32 Chemical series metalloids Group, Period, Block 14, 4, p Appearance grayish white Atomic mass 72. ... Lead sulfide and several other lead salts are used as detection element material in various infra-red sensors. ... Lead selenide (PbSe), or lead(II) selenide, a selenide of lead, is a semiconductor material. ... Indium arsenide, InAs, or indium monoarsenide, is a semiconductor material, a semiconductor composed of indium and arsenic. ... Platinum silicide (PtSi) is a semiconductor material used in infrared detectors. ... Indium antimonide (InSb) is a narrow gap semiconductor material from the group the (III-V group) used in infrared detectors, including thermal imaging cameras, FLIR systems, infrared homing missile guidance systems, and in infrared astronomy. ... Indium antimonide (InSb) is a narrow gap semiconductor material from the group the (III-V group) used in infrared detectors, including thermal imaging cameras, FLIR systems, infrared homing missile guidance systems, and in infrared astronomy. ... mercury ... Mercury zinc telluride (HgZnTe, MZT) is a telluride of mercury and zinc, an alloy of mercury telluride and zinc telluride. ...

See also

Photosensors or photodetectors appear in several varieties: Photoresistors or Light Dependant Resistors (LDR) which change resistance when illuminated Photovoltaic cells or solar cells which produce a voltage and supply an electric current when illuminated Photodiodes which can operate in photovoltaic mode or photoconductive mode Phototubes containing a photocathode which emits...

External links


  Results from FactBites:
 
www.xenics.be - Infrared detector formats (551 words)
Infrared detectors are available as single element detectors in circular, rectangular, cruciform, and other geometries for reticle systems, as linear arrays, and as 2D focal plane arrays (FPAs).
These hybrids may also be used for serial hybridization, allowing the detector to be tested prior to committing the readout, and/or to accommodate readout unit cells having dimensions larger than the detector unit cell, increasing the charge storage capacity and thereby extending the dynamic range.
Detector elements are connected to the underlying readout with vias, which are etched through the detector material to contact pads on the readout and metallized.
How Night Vision Works: Techniques using Low-light and Infrared imaging (2158 words)
In this method, a device that is sensitive to invisible near infrared radiation is used in conjunction with an infrared illuminator.
The supplemental near infrared lighting not only improves the quality of image intensifier devices (which have both a visible and a near-infrared response), but also permits the use of solid state cameras, which also have the ability to convert near infrared images to visible.
Infrared radiation spans the wavelengths between approximately 750 nm (0.75 microns) and 1 mm (1000 microns).
  More results at FactBites »


 

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