Sapphire has superior optical transmission qualities for ball lens and half ball lens. Ball lens is used to improve the signal coupling between optical fiber, transmitter and detector, improve the signal quality, and can also be used in endoscopy, bar code scanning, aspherical lens preprocessed materials, sensors, etc. The ball lens has a short focal length, which minimizes the distance needed to travel from the ball lens to the fiber. Ball lens commonly used in the optical fiber coupling, laser collimating device, Optical Measurement System, it has a shorter focal length and the characteristics of small size. Sunday produce ball lens, half ball lens, Super hemisphere ball lens, hollow ball lens.Sunday Optics can manufacture ball lens Minumum diameter 0.3mm.Sapphire has superior optical transmission qualities for ball lens and half ball lens. Sapphire Ball Lens Specifications: Material:Sapphire Size:0.3-50mm Surface Quality:80-50 Tolerance:+/-0.002mm Coating: AR Coating Ovality:+/-0.002mm Stock Size Part No. Structure Dia.(mm) Material SBS1 Ball lens 1mm Sapphire SBS2 Ball lens 2mm Sapphire SBS3 Ball lens 3mm Sapphire SBS4 Ball lens 4mm Sapphire SBS5 Ball lens 5mm Sapphire SBS8 Ball lens 8mm Sapphire SBS10 Ball lens 10mm Sapphire SBS12 Ball lens 12mm Sapphire SBS20 Ball lens 20mm Sapphire SBS50 Ball lens 50mm Sapphire SHBS1 Half ball lens 1mm Sapphire SHBS1 Half ball lens 5mm Sapphire SHBS1 Half ball lens 6mm Sapphire SHBS1 Half ball lens 10mm Sapphire SHBS1 Half ball lens 13mm Sapphire SHBS1 Half ball lens 24mm Sapphire SHBS1 Half ball lens 36mm Sapphire SHBS1 Half ball lens 40mm Sapphire