Material selection is critical in the development of aircraft transparencies, where weight, strength and optical quality must be assessed carefully.

The choice between polycarbonate and PMMA depends on the component geometry, degree of curvature, thickness, required light transmittance and operating conditions at altitude.

Polycarbonate is preferred for double-curved components and applications requiring impact resistance. PMMA provides superior optical clarity and a high-quality surface finish. Both offer high UV protection, long-term color stability and optical quality suitable for aviation use. They can also be hard-coated to improve abrasion resistance and treated with an anti-fog coating to maintain visibility in high humidity or during rapid temperature changes.