Disadvantages of LWIR & MWIR
Source: Global Sensor Technology
Date: 2023/07/27
While LWIR (Long-Wave Infrared) and MWIR (Mid-Wave Infrared) offer several advantages, they also have some limitations and disadvantages. Here are a few:
1.Disadvantages of LWIR
-Reduced Spatial Resolution
Compared to MWIR, LWIR generally has lower spatial resolution and image quality. The image details may not be as sharp or clear, which can limit the ability to identify small objects or fine features accurately.
-Limited Detection Range
LWIR imaging systems may have a shorter detection range compared to MWIR. This is due to the longer wavelengths of LWIR radiation, which experience higher atmospheric attenuation. As a result, LWIR may have difficulty detecting distant targets or generating detailed images at long ranges.
-Poorer Performance in High Temperature Environments
LWIR sensors may struggle to differentiate between objects and the surrounding environment in high-temperature scenarios. This can lead to reduced accuracy and reliable detection, especially when operating in hot climates or near heat-emitting sources.
2.Disadvantages of MWIR
-Cost
MWIR imaging systems are generally more expensive compared to LWIR. The higher cost can limit their accessibility for certain applications, particularly those with budget constraints or consumer-oriented markets.
-Reduced Performance in Atmospheric Obscuration
While MWIR has better penetration capabilities compared to LWIR, it is still affected by atmospheric factors such as haze, smoke, and dust. These obscurants can diminish the image quality and limit the visibility range in MWIR systems.
-Sun Glint Interference
MWIR can be susceptible to sun glint, which refers to the reflection of sunlight off smooth or shiny surfaces. This reflection can create unwanted bright spots in the image, reducing the visibility of the intended target or scene.
It’s worth noting that the disadvantages mentioned above are not absolute, and advancements in technology and sensor design continue to address some of these limitations. Additionally, the choice between LWIR and MWIR should be based on the specific requirements of the application, considering factors such as cost, resolution, detection range, and environmental conditions.
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