What helps an infrared seeker detect weaker heat signals? A miniature cooling device is helping Indian industry address a specialised defence technology gap.
Mumbai-based Techno Defence has developed an indigenous Joule-Thomson (JT) cooler for cooled infrared detectors used in missile seeker applications, with support from the Defence Research and Development Organisation (DRDO). The company works on indigenous defence and seeker technologies, while the development addresses dependence on imported cooling components for infrared sensing systems.
Infrared detectors can generate thermal and electronic noise that affects their ability to distinguish weak heat signals from targets. Cooling the detector to a low operating temperature reduces this noise and allows the sensing element to detect target radiation more effectively. This makes the cooling assembly an important part of seeker systems that rely on infrared detection.
The development was supported through DRDO’s Technology Development Fund (TDF), which supports Indian companies working on defence technologies that have limited domestic availability. DRDO records list the project as the “Development of Dual flow self regulation JT Cooler”, associated with the Solid State Physics Laboratory and Research Centre Imarat.
The cooler uses a dual-flow configuration that regulates gas flow after the detector reaches its required temperature. According to DRDO information cited in the source, the system can bring a high-performance cooled infrared detector to its required operating temperature in less than 10 seconds.
The startup had earlier stated that the cooler could weigh around 15 grams and cool sensors to approximately -175°C within the same timeframe. Its compact size and low weight are relevant to seeker systems, where cooling hardware must operate within constrained space and weight requirements.
The development adds another component to India’s domestic capabilities for infrared sensing, alongside detector arrays and detector-dewar-cooler assemblies used in missile applications. The source does not provide a closing spokesperson quote.
