Vantablack, a carbon nanotube coating from Surrey NanoSystems in the UK, has proven to be a breakthrough solution, achieving an unprecedented high level of light suppression at -269°C in a Fourier transform spectroscopy module used by ABB, a global leader in space instrumentation. This innovation is paving the way for the next generation of highly sensitive space telescopes.
Experimental assessments conducted by ABB, with support from the Canadian Space Agency, measured photon leakage through a cryogenic far infrared (FIR) Fourier transform spectroscopy scan mechanism (FTSM) position feedback prototype using a 1500 nm laser. The testing took place at the 4K Test Facility Cryostat operated by Blue Sky Spectroscopy Inc. at the University of Lethbridge. The analysis of measurement results demonstrated a drastic reduction in photon leakage suppression.
Unlike existing coatings, which can exhibit a high reflectance at cryogenic temperatures, Vantablack S-IR enables simpler, lighter optical designs with superior absorption.
This advancement supports and enhances deep-space observation capabilities. By enabling highly sensitive astronomical measurement while reducing both baffle assembly complexity and mass, offering a transformative solution for future space missions.
This remarkable result underscores how the application of Vantablack S-IR to internal optical surfaces significantly enhances the performance of laser-based cryogenic FIR FTSM position feedback modules.
Keiran Clifford, Senior Technologist at Surrey NanoSystems and first author of the paper said: “This is an incredible demonstration of the power of Vantablack to absorb virtually all incident light. Not only does Vantablack improve the sensitivity of the cryogenic infrared spectroscopy module, but it enables a major simplification of the design. This technology is expected to greatly improve the performance of upcoming cryogenically cooled spaceborne instruments which will probe the coldest and most distant objects in the universe.”
This level of light suppression is crucial for ensuring the accuracy and efficiency of advanced space observation systems. By eliminating stray light interference, Vantablack allows for more precise measurements and deeper exploration.
Blue Sky Spectroscopy Inc. Founder and CTO, Dr. David Naylor said “It is the ultra sensitivity of modern FIR detectors that drives the requirement for making sure no NIR laser metrology photons escape from the spectroscopy module.”
Additionally, Alain Cournoyer, Senior System Engineer at ABB was thrilled with the results stating that it is ‘Hard to detect any leaks when the Vantablack S-IR coating does such a good job in absorbing photons!”
Surrey NanoSystems remains committed to pushing the boundaries of optical coating technology, supporting cutting-edge advancements in aerospace and scientific research.
Read Surrey NanoSystems’ Cryogenic baffle assemblies whitepaper