Cooled vs. Uncooled Thermal Cameras: Key Differences and Applications

Here’s a clear comparison between cooled and uncooled thermal imaging cameras

Cooled Thermal Cameras

- Detector: Uses photon-based infrared detectors (e.g., InSb, HgCdTe).  

- Cooling Required: Integrated with Stirling coolers or TEC (Thermoelectric Coolers) to cool the detector to cryogenic temperatures (~-196°C) for reduced noise.  

- Principle: Relies on photon absorption; cooling minimizes thermal interference.  

Uncooled Thermal Cameras

 -Detector: Uses microbolometers (e.g., VOx, amorphous silicon).  

 - No Cooling: Operates at ambient temperatures (-20°C to +60°C).  

 - Principle: Measures resistance/voltage changes caused by thermal radiation.  

Applications

Cooled Cameras: 

- Military: Missile guidance, aerial reconnaissance.  

- Scientific: Astronomy, gas analysis.  

- Industrial: Long-range monitoring of high-temperature equipment.  

Uncooled Cameras:  

- Security: Surveillance, perimeter protection.  

- Firefighting: Search and rescue.  

- Civil Use: Building inspections, medical thermography.