Newport MKS Micro Lens, Plano-Plano, Gradient Index, 2 mm, .46 NA, 630 nm,0.25 Pitch LGI630-4

The LGI630-4 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 2.0 mm diameter, a 5.17 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.