ICCIR

Miniaturized Pulse Tubes
new generation

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High-performance, high reliability cryogenic coolers for terrestrial infrared cameras.

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Absolut System is developing a long-life cooled optronic system, in partnership with French manufacturers Lynred and HGH. Our R&D teams have developed a new generation of high-frequency, high-availability Pulse-Tube. Combined with a cryostat and a Lynred infrared detector, it forms a compact, reliable detection subassembly. The complete optronic system is integrated into HGH’s cameras to provide highly reliable surveillance of strategic civil or military zones:

  • Security and surveillance (Civil)
  • Machine Vision and industrial sorting (Civil)
  • Situation analysis and threat detection (Defense)
  • Hand-Held Thermal Imager (Portable applications for the defense market)
  • New Space applications: Earth observation

 

This miniaturized, long-life chiller reduces the need for annual maintenance, cutting costs and logistics.

Supported by the BPI, the project aims to enhance French industrial sovereignty by industrializing the entire Pulse-Tube manufacturing process in Absolut System’s workshops. This high-frequency cryocooler is unique in its category for its size and its lifespan of over 4 years. It also stands out for its ability to be integrated with both terrestrial cameras and Earth observation nanosatellites.

 

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Cryogenics for optronics:
infrared imaging

Infrared imaging is used to detect heat-emitting objects. The higher the temperature of an object, the more infrared radiation it emits. Infrared imaging enables detection and monitoring in all lighting and weather conditions.

When the infrared detector is cooled to cryogenic temperature, the signal-to-noise ratio is improved, enabling detection of distant objects or small temperature differences. Currently, chillers are the main “wearing part” of these systems (annual maintenance on average).

New-generation cameras incorporating the CRYASSY Focus will benefit from unrivalled reliability, in relatively small form factors.

This innovation is extremely interesting for HGH panoramic surveillance cameras. These cameras deliver 360° infrared images and provide 24/7 active surveillance for most applications.

Key stages in innovation

This project has enabled us to remove technological barriers in cryogenics, and to bring together 3 French manufacturers.

Increasing the operating frequency of the miniaturized Pulse-Tube makes it possible to reduce component size. However, this miniaturization is accompanied by a number of technological hurdles to be overcome, such as:

  • The miniaturization of the flexible-bearing compressor;

  • Optimization of heat exchange within the cryogenic cooler, which becomes particularly critical as frequency increases.

 

Our teams of R&D engineers and technicians have produced a prototype cryogenic cooler adapted to terrestrial and space conditions.

Eventually, more than a hundred infrared cameras incorporating the Pulse-Tube cooler will be produced and marketed worldwide by HGH. Observation satellites will be equipped with the miniature high-frequency Pulse-Tube designed by Absolut System.

Adapted for the CRYASSY Focus miniaturized cryogenic assembly, the new-generation Pulse-Tube is a perfect example of Absolut System’s innovative capabilities in detector cooling (optronics) and multispectral or hyperspectral infrared imaging.

Increasing the operating frequency of the miniaturized Pulse-Tube makes it possible to reduce component size. However, this miniaturization is accompanied by a number of technological hurdles to be overcome, such as:

  • The miniaturization of the flexible-bearing compressor;
  • Optimization of heat exchange within the cryogenic cooler, which becomes particularly critical as frequency increases.

 

Our teams of R&D engineers and technicians have produced a prototype cryogenic cooler adapted to terrestrial and space conditions.

Eventually, more than a hundred infrared cameras incorporating the Pulse-Tube cooler will be produced and marketed worldwide by HGH. Observation satellites will be equipped with the miniature high-frequency Pulse-Tube designed by Absolut System.

Adapted for the CRYASSY Focus miniaturized cryogenic assembly, the new-generation Pulse-Tube is a perfect example of Absolut System’s innovative capabilities in detector cooling (optronics) and multispectral or hyperspectral infrared imaging.

Cryogenics for optronics :
infrared imaging

Infrared imaging is used to detect heat-emitting objects. The higher the temperature of an object, the more infrared radiation it emits. Infrared imaging enables detection and monitoring in all lighting and weather conditions.

When the infrared detector is cooled to cryogenic temperature, the signal-to-noise ratio is improved, enabling detection of distant objects or small temperature differences. Currently, chillers are the main “wearing part” of these systems (annual maintenance on average).

New-generation cameras incorporating the CRYASSY Focus will benefit from unrivalled reliability, in relatively small form factors.

This innovation is extremely interesting for HGH panoramic surveillance cameras. These cameras deliver 360° infrared images and provide 24/7 active surveillance for most applications.

AS-vue_satellitaire_champs_riviere_hyperspectrale_shutterstock-200122

Key stages in innovation

This project has enabled us to remove technological barriers in cryogenics, and to bring together 3 French manufacturers.

Increasing the operating frequency of the miniaturized Pulse-Tube makes it possible to reduce component size. However, this miniaturization is accompanied by a number of technological hurdles to be overcome, such as :

Miniaturization of the flexible-bearing compressor;


Optimizing heat exchange within the cryogenic cooler, which becomes particularly critical as frequency increases.

 


Our teams of R&D engineers and technicians have produced a prototype cryogenic cooler adapted to terrestrial and space conditions.

Eventually, over a hundred infrared cameras incorporating the Pulse-Tube cooler will be produced and marketed worldwide by HGH. Observation satellites will be equipped with the miniature high-frequency Pulse-Tube designed by Absolut System.

Adapted for the CRYASSY Focus miniaturized cryogenic assembly, the new-generation Pulse-Tube is a perfect example of Absolut System’s innovative capabilities in detector cooling (optronics) and multispectral or hyperspectral infrared imaging.

Increasing the operating frequency of the miniaturized Pulse-Tube makes it possible to reduce component size. However, this miniaturization is accompanied by a number of technological hurdles to be overcome, such as :

Miniaturization of the flexible-bearing compressor;
Optimizing heat exchange within the cryogenic cooler, which becomes particularly critical as frequency increases.

 


Our teams of R&D engineers and technicians have produced a prototype cryogenic cooler adapted to terrestrial and space conditions.

Eventually, over a hundred infrared cameras incorporating the Pulse-Tube cooler will be produced and marketed worldwide by HGH. Observation satellites will be equipped with the miniature high-frequency Pulse-Tube designed by Absolut System.

Adapted for the CRYASSY Focus miniaturized cryogenic assembly, the new-generation Pulse-Tube is a perfect example of Absolut System’s innovative capabilities in detector cooling (optronics) and multispectral or hyperspectral infrared imaging.

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the CRYASSY range

Discover the CRYASSY range

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