Newport MKS Micro Lens, Plano-Plano, Gradient Index, 1.8 mm, .46 NA,630nm,0.25 Pitch LGI630-3

The LGI630-3 GRIN Lens has a 0.25-pitch lens that is useful for fiber coupling and collimating and fiber-to-fiber coupling. This SELFOC® radial gradient index oxide glass general purpose plano-plano lens has a 1.8 mm diameter, a 4.63 mm length, a 0.46 NA, and is antireflection coated to provide maximum transmission at 630 nm. Gradient index micro lenses have a radially varying index of refraction that causes an optical ray to follow a sinusoidal propagation path through the lens. They combine refraction at the end surfaces along with continuous refraction within the lens.