The Positive Meniscus lens is used to decrease the focal length of another lens while maintaining the angular resolution of the optical assembly. These lenses are commonly used to achieve tighter beam focusing paired with another positive lens.

Positive meniscus lenses are designed to minimize spherical aberration. One surface of the lens is convex, while the other surface is concave. When used in combination with another lens, a positive meniscus lens will shorten the focal length, and increase the NA of the system.

An Antireflection Coating can reduce the amount of light reflected from each surface of the lens. Thorlabs BK7 Lenses are available with our standard -A, -B, -C Broadband Antireflection Coating (please see Graph tab above for coating details).