- Optical BK7 Plano-convex cylindrical lens with coating
- 2017-11-04 03:14
- Cylindrical lens is used to correct astigmatism in the eye, and, in rangefinders, to produce astigmatism, stretching a point of light into a line.They are available in either plano concave or plano convex configurations. Plano-Concave Cylindrical len...