Optical LensChina Diameter 3mm Focal Length 2mm Optical Glass Fused Silica Aspherical Lens for Laser Collimator, Find details about China Custom Optical Glass Aspheric Lens, Optical Glass Aspheric Lens Made of Fused Silica from Diameter 3mm Focal Length 2mm Optical Glass Fused Silica Aspherical Lens for Laser Collimator