Positive Meniscus Lenses

Description

Introduction of Bote Positive Meniscus Lenses

The positive meniscus lens is a type of meniscus lens, similar in shape to the concave and convex lens.

The meniscus lens is a moon-shaped lens composed of two spherical surfaces with a small radius of curvature and a small numerical radius.

Positive meniscus lenses are used to reduce the focal length of another lens while maintaining the angular resolution of the optical assembly. Its materials include BK7, UV fused silica, CaF2, and ZnSe, etc.:

Application

• Beam expander lens, imaging lens, converging lens

Feature of Bote Positive Meniscus Lenses

• A positive meniscus lens is composed of two curved surfaces with similar radii of curvature and has a positive focal length. Usually used to reduce the focal length of another lens, increase the numerical aperture and other related applications.
• In order to reduce spherical aberration, when applying beam expansion or contraction or divergent collimated light, the light beam should be incident on the convex surface of the lens.
• When used for convergent light collimation, the light beam should enter the lens. Shoot on the concave surface.
• Positive meniscus lenses are primarily used to minimize spherical aberration. When combined with another lens, a positive meniscus lens can reduce the focal length and increase the system numerical aperture (NA) without introducing significant spherical aberration.
• When used to converge parallel light, in order to minimize spherical aberration, the convex surface of the lens should be oriented in the direction of emission from the light source.
• Coated lenses are also widely used in visible light and near-infrared applications.