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The features of Meniscus Lenses

Yutai optics' Meniscus Lenses include Positive meniscus lenses and Negative meniscus lenses.
Positive meniscus (convex-concave) lenses are designed to minimize spherical aberration. When used in combination with another lens, a positive meniscus lens will shorten the focal length and increase the numerical aperture (NA) of the system without introducing significant spherical aberration. When used to focus a collimated beam, as shown in the diagram above, the convex side of the lens should face the source to minimze spherical aberration.
Negative meniscus (convex-concave) lenses, are designed to minimize spherical aberration in optical systems. When used in combination with another lens, a negative meniscus lens will increase the focal length and decrease the numerical aperture (NA) of the system. When used to diverge light, as shown in the diagram above, the convex surface should face the beam to minimize spherical aberration.

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