Bolometer - definition
Bolometer - definition
The Bolometer is a sensitive measuring instrument for the detection and measurement of electromagnetic radiation, particularly in the infrared and radio wave range. Its operation is based on the measurement of the increase in temperature caused by the absorption of radiant energy by a suitable detection material. The change in temperature alters the physical properties of the measuring element, most often the resistance, which allows the precise determination of the power of the incoming signal.
A basic bolometer consists of an absorption material and a temperature-sensitive element, usually a thin conductor or semiconductor. When radiation is absorbed, the material heats up and the resulting change in electrical conductivity is recorded by an electronic circuit. The high sensitivity of this type of device allows detection of even very weak signals, which is why bolometers are used in astronomy, spectroscopy, materials research and thermal imaging technology.
Others types of bolometers are used in practice, depending on the radiation range and application requirements. There are cryogenically cooled bolometers, used in space observatories, and room temperature versions, used e.g. in Infrared Cameras. Advanced versions use microelectromechanical systems (MEMS), which allow the miniaturisation of detectors and the creation of bolometer arrays.
Due to their design and mode of operation, bolometers are not wavelength-selective detectors, meaning that they measure the total radiant energy within a specific spectral range. The accuracy of the measurement depends, among other things, on the effectiveness of the thermal insulation of the measuring element and the temperature stability of the environment.
Transfer Multisort Elektronik (TME) is one of the world’s largest global distributors of electronic components, electrotechnical parts, workshop equipment, and industrial automation. The catalog includes over 1,500,000 products from 1,300 leading manufacturers. TME’s modern logistics centers in Łódź and Rzgów (Poland), with a combined area of over 40,000 m², ship nearly 6,000 packages daily to customers in more than 150 countries.
TME also invests in the development of knowledge and skills of young engineers and electronics enthusiasts through the TME Education project, and supports the tech community by organizing the TechMasterEvent series, promoting innovation and experience exchange.
