The Types segment classifies polycarbonate products for optical use into four principal formats: sheet, film, molded, and injection‑molded variants. Sheet polycarbonate, representing the largest share, is preferred for large‑area lenses and protective windows due to its ease of machining and uniform thickness control. Film formats, typically under 0.5 mm, serve as anti‑scratch or anti‑reflective coatings in optical assemblies, contributing a modest yet growing portion of the market as thin‑film technologies advance. Molded polycarbonate, produced via compression or transfer molding, is essential for complex curvature lenses used in automotive and aerospace optics, offering superior surface finish without post‑processing. Injection‑molded components, increasingly adopted for compact optical modules, provide high‑volume, cost‑effective production of intricate lens geometries. Each type adds distinct value to the overall market, with sheet and molded categories driving the bulk of revenue while film and injection‑molded formats capture niche, high‑margin opportunities, reflecting a diversified product taxonomy.