VANTABLACK TECHNOLOGY
THE DARKEST MATERIAL. THE BRIGHTEST IDEAS.
4 DIMENSIONS OF PERFORMANCE PRODUCE THE VANTABLACK EFFECT
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Non-reflective (<0.2%)
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Lambertian scattering light evenly in all directions
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Performs from UV to IR wavelengths
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Durable whether resisting ram direction atomic oxygen in low earth orbit or solvent wipes for terrestrial instrumentation, there is always a Vantablack solution.
TIMELINE
TOTAL HEMISPHERICAL REFLECTANCE (THR)
Ultra-black coatings are routinely characterised in terms of total hemispherical reflectance (THR). THR describes the fraction of light reflected by a surface, integrated across all angles.
The sample is mounted against a small aperture. Monochromatic light illuminates the sample at fixed angle of incidence. An integrating sphere measures all reflected light and converts this into an electrical signal.
𝑇𝐻𝑅(%)= 𝜑_𝑟𝑒𝑓𝑙𝑒𝑐𝑡𝑒𝑑/𝜑_𝑖𝑛𝑐𝑖𝑑𝑒𝑛𝑡 ×100
Vantablack® THR <0.2% ,less than half the reflectance of its nearest competitor.
BIDIRECTIONAL REFLECTANCE DISTRIBUTION FUNCTION (BRDF)
Many surfaces reflect light through a combination of diffuse and specular components, as seen in the central glossy sphere opposite. It can be useful to separate these contributions.
Diffuse (or, Lambertian) surfaces reflects light equally in all directions irrespective of viewing angle. For most optical instruments, diffusely scattered stray light sources are the most difficult to control
BRDF Characterises angular dependency of light absorption. Vantablack® has a Lambertian surface with consistent performance at all angles and low specular reflection, ie perfectly diffuse or matt.
WAVELENGTH RANGE OF LIGHT SUPPRESSED
Vantablack has the capability to perform THR characterization across a wide range of wavelengths:
UV-Vis-NIR (220 – 1400 nm)
SWIR – FIR (1.4 – 16 µm)
This is achieved using spectrophotometers with integrating spheres to capture all reflected light.
The spectral range over which the coating maintains its performance Vantablack® has a wide range: UV-IR (200nm-600μm) with no spectral features
DURABILITY
Endures extreme temperatures, shock and vibration
Does not outgas or cause fogging
Is ATOX resistant, even in the ram direction
In addition, Vantablack 310 can be handled and easily cleaned