BK7 Bi-Concave Spherical Lenses

We are offering bk7 bi-concave spherical lenses. bk7 bi-concave spherical lenses size and coating of the lenses can be customized according to users’ needs specification material schott bk7 design wavelength 632.8nm focal length tolerance ±1% diameter tolerance +0/-0.1mm thickness tolerance ±0.1mm surface accuracy λ/4@632.8nm surface quality 40-20 centration 90% bevelling