Edmund Optics Inc. GRIN Lens 1.8mm Dia, 1550nm DWL, 0.23mm WD, BBAR Coating NT64-550

Ideal for Fiber Coupling and Laser Diode Beam Shaping Comparable Performance to Conventional Aspherical Singlets 3 Sizes and 3 Wavelength Options Gradient Index (GRIN) lenses feature plane optical surfaces and achieve focus via a continuous change of the refractive index within the lens material. By eliminating complex geometries (such as aspherical surface figures) and carefully designing the lenses for specific working distances, these micro lenses are quite easy to handle and integrate into optical systems.Our GRIN lenses are designed to provide a 0.55 numerical aperture, and are available in 2 working distance options. Lenses with a 0mm working distance are ideal for collimation of single and multi-mode optical fibers and laser diodes because the lens can be positioned and glued directly to the emission source. For focusing applications, or in instances where the lens cant be in direct contact with the emission source, all lenses are available with a small working distance as well. Each lens is available uncoated (approximately 12% reflection loss), or with a BBAR coating option for R <0.5%.