Features of infrared detectors

Infrared detector (Infrared Detector) is a device that converts incident infrared radiation signals into electrical signals for output. Infrared radiation is an electromagnetic wave with a wavelength between visible light and microwave, which is invisible to the human eye. To detect the existence of this radiation and measure its strength, it must be transformed into other physical quantities that can be detected and measured. Generally speaking, any effect caused by infrared radiation irradiating an object can be used to measure the intensity of infrared radiation as long as the effect can be measured and is sufficiently sensitive. Modern infrared detectors mainly use infrared thermal effect and photoelectric effect. The output of these effects is mostly electricity, or it can be converted into electricity by an appropriate method.

Features

The infrared band emitted by different kinds of objects has its specific band, and the infrared light in this band is outside the visible band. Therefore, people can use this specific band of infrared light to detect and track objects. The technology that detects invisible infrared radiation and converts it into a measurable signal is the application of infrared detection technology. Infrared detection has the following advantages: environmental adaptability is better than visible light, especially at night and Ability to work in harsh weather; good concealment, generally passive reception of target signals, safer and more confidential than radar and laser detection, and not easily interfered; due to temperature difference and emissivity difference between target and background Infrared radiation characteristics of the detection, so the ability to identify pseudo-zhuang targets is better than visible light; compared with radar systems, infrared systems are small in size, light in weight and low in power consumption; the spectral response of the detector extends from short wave to long wave; detector From unit development to multi-element, from multi-element to focal plane; a wide variety of detectors and systems have been developed; from single-band detection to multi-band detection; from cooled detectors to room temperature detectors.