FAST Space SMART Glass: Multi-Layer Advanced Shielding Technology
This revolutionary SMART Glass technology is set to redefine the future of space travel — not only by protecting spacecraft, stations, and habitats from micrometeoroids and high-velocity impacts, but by shielding human life from the full spectrum of cosmic radiation.

Unlike traditional spacecraft windows, FAST Space’s SMART Glass is a five-layered transparent defense system engineered for extreme conditions in deep space. Every millimeter serves a purpose, working in synergy to deliver unmatched protection, clarity, and durability.
The core system can withstand a 20mm high-velocity projectile — the same caliber used in the M61 Vulcan and Oerlikon autocannons — far exceeding what any standard spacecraft window can endure.

1. Exterior Layer (Exposed to Space)
Thickness: 60 mm (2.362 inches)

This outermost layer endures the brutal thermal extremes of space — from ?270°C (?455°F) to +1,000°C (1,832°F). It is a proprietary fusion of polycarbonate, borosilicate, and ceramic glass, engineered to maintain both clarity and structural integrity across massive thermal gradients, impact events, and radiation exposure.

2. First Filament Layer
Thickness: 6.2 mm (0.244 inches)

This impact-dispersive layer is a chemically stabilized blend of Boron Nitride (BN) infused UHMWPE, polycarbonate, Pyroceram, and NeoCeram, strengthened with FAST Additives. It provides outstanding neutron radiation shielding and contributes significantly to micrometeoroid protection. Advanced compatibilizers such as Styrene-Butadiene-Styrene (SBS) ensure molecular cohesion and structural integrity under pressure.

3. Core Layer (Inner Core)
Thickness: 60 mm (2.362 inches)

This core comprises two opposing slabs of transparent metal, sandwiching a central polycarbonate impact diffuser. The result is a dense, energy-dispersing barrier that enhances both cosmic radiation absorption and penetrative resistance, while maintaining optical performance for crew visual applications.

4. Second Filament Layer
Thickness: 6.2 mm (0.244 inches)

A mirror layer to the first, this blend of polycarbonate and UHMWPE is enriched with optical brighteners, nucleating agents, surface modifiers, and clarification compounds — creating crystal clarity while bolstering radiation and impact resistance from the inner side.

5. Interior Finisher Layer
Proposed Thickness: 20 mm (0.787 inches)

This final layer is where optical comfort meets final-stage defense. It combines the transparency and resilience of MgAl?O? spinel with the shielding efficiency of COR-RA (Transparent Metal-Salt-Filled Polymer). This hybrid composition ensures excellent gamma-ray and X-ray attenuation, while delivering a smooth, distortion-free surface that resists degradation, radiation fogging, and microabrasion over long-duration missions.