At present, the most commonly used cooled infrared detectors are MWIR and LWIR. They are divided based on the detected response wavelength and therefore differ in some respects. When customers choose a cooled infrared detector, they often think about which waveband to choose for different applications. This article reveals the differences between them from different aspects.
1.Spectral response
The fundamental difference between them is the different spectral response. The medium wavelength ranges from 3 to 5 μm, and the long wavelength ranges from 8 to 14 μm.
2.Adaptability
The medium wave infrared detector can work in harsh environments such as high temperatures, smoke, and haze. Their imaging effect is very clear, and they can capture more details of the target. However, they are easily affected by atmospheric factors, while long wave infrared detectors are more suitable for dry, dusty, and long-distance detection. Therefore, in humid climate conditions such as rainy and foggy days, the working distance and effect of the medium are significantly better than those of the long. However, cooled lwir detectors have significantly better range and effectiveness than mwir detectors in sandy and dusty climate conditions. In order to combine the advantages of medium and long waves, GSTiR has developed dual-color cooled infrared detectors that can better adapt to environmental changes.
3.Cost
The manufacturing technology of cooled medium wave infrared detector is relatively mature and cost-effective, while the lwir detector is complex and the materials are relatively expensive.
In summary, medium wave and long wave infrared detectors have their own advantages and disadvantages. So in application, it is necessary to choose a suitable one according to the actual situation.
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Cooled Thermal Modules