Asqella’s passive multi-band submillimetre-wave camera technology builds on years of state-of-the-art applied science research carried out at VTT Technical Research Centre of Finland, a governmental research laboratory.

At the heart of the system lies a patented focal plane array of exceedingly sensitive detectors – superconducting antenna-coupled micro bridge bolometers. These detectors utilise the fundamental properties of superconductors to reach a level of sensitivity that is unreachable by other sensor technologies.

Asqella’s bolometers can sense a signal power that is one hundredth of a thousandth of a billionth of a watt (about 10 femtowatts, or 0.000 000 000 000 01 watts)!

The passive camera technology operates simultaneously at multiple submillimetre-wave frequencies. This provides several significant benefits: the wavelengths at the lower end of the operating range provide better penetration through obscurants, allowing the reliable detection of objects under thicker clothing, while the wavelengths toward the high end of the operating range give superior image resolution.

  • Completely passive – no irradiation whatsoever
  • Proprietary image processing algorithms allow for optimal image quality across a range of operating conditions.
  • Multi-band operation facilitates the detection of low-reflectivity concealed objects which are thermalized close to the body temperature.
  • Running at true real-time frame rates, the camera can detect objects on moving subjects.
  • A large field-of-view ensures that all objects are detected.
  • High image definition and contrast facilitates reliable detection.

All of these benefits improve the reliability, speed and convenience of the screening process.