Durable High Temperature Resistance Borosilicate Glass Aspheric Lens for COB LED for Headlights

Material & Core Properties:
These lenses are precision-fabricated from premium borosilicate glass, a material engineered for extreme environments.

• Superior High Temperature & Thermal Shock Resistance: Borosilicate glass possesses an extremely low coefficient of thermal expansion (CTE ~3.3 x 10⁻⁶/K). This allows it to withstand the intense, sustained heat generated by high-lumen COB LEDs (often exceeding 150°C junction temperatures) without softening, deforming, cracking, or yellowing, ensuring stable performance over the vehicle's lifetime.

• Precision Aspheric Optical Design: The lens features a meticulously calculated non-spherical (aspheric) curvature. This design eliminates spherical aberration inherent in simple spherical lenses, enabling a single optical element to efficiently collimate the broad, lambertian emission of a COB LED into a sharp, well-defined beam pattern with high efficiency and minimal optical waste.

• High Optical Transmission & Durability: Provides excellent light transmission (>92% in the visible spectrum) and is inherently scratch-resistant and chemically inert. It resists degradation from UV exposure and environmental contaminants, maintaining clarity and optical integrity where plastics fail.

Primary Function:
The core function of this lens is to act as a high-efficiency, thermally robust Primary Optical Element (POE). It directly transforms the raw output of a high-power COB LED into a regulated, compliant beam pattern suitable for road illumination while surviving in the harsh engine bay environment.

Key Applications:

• Automotive Exterior Lighting: The primary optic for LED headlights (low beam, high beam), fog lamps, and daytime running lights (DRLs), where regulatory beam patterns, maximum luminance, and long-term reliability are non-negotiable.

• High-Flux Commercial & Specialty Lighting: Ideal for stadium lights, searchlights, aviation ground lighting, and other applications requiring high luminous output coupled with exceptional thermal and environmental durability.