Shanghai Longway Special Glass Co., Ltd.
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Anti-reflective Coating Optical Hemispherical Glass Dome for CCTV Photography
Material Composition
The dome is crafted from high-purity optical-grade glass (e.g., borosilicate or fused silica), renowned for its exceptional clarity and durability. It features a multi-layer anti-reflective (AR) coating, typically composed of thin-film materials like magnesium fluoride (MgF₂) or silicon dioxide (SiO₂), applied via vacuum deposition.
Key Properties
High Light Transmittance: The AR coating minimizes surface reflections (<1% reflectivity), ensuring ~99% light transmission for superior image clarity.
Scratch Resistance: Hardened glass and coatings resist abrasions, maintaining optical integrity in harsh environments.
Environmental Durability: UV-resistant coatings prevent yellowing, while hydrophobic layers repel water and dust.
Wide-Angle Performance: The hemispherical shape reduces geometric distortion, enabling seamless 180° field-of-view coverage.
Applications
Surveillance Systems: Deployed in public spaces (airports, streets), commercial buildings, and residential areas for unobstructed monitoring.
Traffic Monitoring: Enhances license plate recognition and incident detection under varying lighting conditions.
Industrial Security: Used in factories, warehouses, and offshore rigs to withstand corrosive or high-impact environments.
Smart Cities: Supports AI-powered analytics by delivering distortion-free footage for facial recognition or motion tracking.
Functional Benefits
Glare Reduction: Eliminates unwanted reflections from ambient light (e.g., headlights, sunlight), critical for 24/7 CCTV surveillance.
Weatherproofing: Protects internal camera lenses from rain, dirt, and vandalism.
Color Accuracy: Preserves true-to-life color reproduction by minimizing spectral distortion.
| Name | Optical hemispherical glass dome |
| Material | Optical glass, Qurartz glass, borosilicate glass |
| Diameter Tolerance | +0/-0.15 mm |
| Thickness Tolerance | +/-0.15mm |
| Processed | by grinding, polishing |
| Surface Quality | 80/50,60/40,40/20 |
| Material Quality | no scratches and air bubble |
| Transmission | above 90% |
| Chamfer | 0.1-0.5 mm x 45° |
| Surface Coating | Available |
| Usage | Photography, Lighting system, Optics |
