Wissen

A meniscus lens has one convex surface and one concave surface — the shape gives it its name, since it looks like a crescent moon in cross-section. Meniscus lenses are rarely used on their own; they're almost always paired with other lenses to correct aberration and refine an existing light path. Key...

An aspheric lens has a surface curvature that changes continuously from the center to the edge, instead of staying constant like a spherical lens. That extra design freedom lets a single aspheric element correct aberrations that would otherwise take several spherical lenses to fix. Key Specifications at a Glance Parameter Typical Value...

A cylindrical lens has curvature in only one direction instead of two, so it focuses light into a line instead of a point. That one-axis behavior makes it the standard tool anywhere an optical system needs to control a beam's shape in just one dimension. Key Specifications at a Glance Parameter Typical...