ii vi optical lens 20mm diameter

II-VI Lens Optical Lens Dia 20/25.4mm Focal length 50.8/63.5mm Business Scope:Specialize in Spherical lens,Aspherical lens,Cylindar lens,Rod lens,Windows glass,optical Filter, Photochromic Invisible Bifocal Lenses optical prism,Reflection lens ,camera lenses ect,and provied optical design and ...