High-Precision Convex Lenses for Automotive Lighting | Geqin Auto Parts

Foshan Geqin Auto Parts manufactures precision concave-convex lenses for specialized automotive lighting applications. These hybrid optical components combine a concave surface (curved inward) with a convex surface (curved outward) to achieve unique light control properties. The lenses utilize optical-grade polycarbonate or PMMA with 90%+ light transmission for superior optical performance. We carefully calculate the curvature ratios (typically R1:R2 from 1:1.5 to 1:3) to create specific optical effects including light spreading with reduced spherical aberration. The manufacturing process maintains micron-level precision on both curved surfaces (Ra <0.05μm) for consistent performance. Our concave-convex lenses demonstrate excellent resistance to thermal cycling (-40°C to 120°C) without optical distortion. The designs minimize chromatic aberration compared to simple convex lenses. We offer various diameter options (30-250mm) with precise center thickness control (±0.05mm). The lenses incorporate UV-resistant formulations that prevent yellowing under prolonged sun exposure. Our quality control includes comprehensive testing of focal properties and light distribution characteristics. The concave-convex configuration provides wider light dispersion than standard convex lenses while maintaining good light collection efficiency. We can customize solutions for specific beam shaping requirements in automotive lighting systems.