4.0mm Diameter, Ruby Half-Ball Lens

Product Details Excellent for Severe Environments High Chemical Stability Sapphire and Ruby Ball Lenses Also Available Sapphire and Ruby Half-Ball Lenses feature a very short back focal length with the convenience of a flat surface for easy mounting. Sapphire features a high index of refraction and excellent broadband transmission characteristics. Ruby half-ball (hemispherical) lenses are easier to see and, therefore, easier to handle for physical applications. Sapphire and Ruby Half-Ball Lenses are very chemically stable and are great for severe environments, high-temperature applications, and applications requiring high melting points. Typical applications include fiber communication, endoscopy, microscopy, optical pick-up devices, and laser measurement systems. Specifications General Type: Half-Ball Lens Physical & Mechanical Properties Diameter (mm): 4.00 Diameter Tolerance (μm): ±2.54 Thickness (mm): 2.00 Radius R (mm): 2.00 Specific Gravity (g/cm 3 ): 3.98 Compressive Strength (psi): 300,000 Optical Properties Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Ruby Doped Sapphire (Al 2 O 3 ) Index of Refraction (n d ): 1.77 Coating: Uncoated Sphericity (μm): 0.64 Environmental & Durability Factors Melting Temperature (°C): 2053.00 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 247: Compliant ×