Category: Lenses

Lenses are classified by the curvature of the two optical surfaces. A lens is biconvex if both surfaces are convex, likewise, a lens with two concave surfaces is biconcave. If one of the surfaces is flat, the lens is plano-convex or plano-concave depending on the curvature of the other surface. A lens with one convex and one concave side is convex-concave, and in this case if both curvatures are equal it is a meniscus lens.

Typically used to reduce spherical aberration, coma and chromatic aberration

These lenses are considerably reduced values of spherical aberration, coma and chromatic aberration. Best used to replace single components where performance must be improved.

A negative or divergent meniscus lens is also convex-concave, but is thinner at the center than at the edges.

A positive or convergent meniscus lens is a convex-concave lens thicker at the center than at the edges. They are felt polished and are used universally in the ophthalmic industry where convention dictates that lens power be specified in Diopters.

A Bi-Concave Lens is a divergent or negative lens, thicker at the edge than in the center. All TechnoOptic  Lenses are symmetrical having equal radii on both sides. These lenses form a virtual image and are frequently used to extend the effective focal length of a converging lens when they … Read More

Bi -Convex Lenses have two outward curved surfaces, a positive focal length and are useful for 1:1 imaging and in multi-element systems.

A Plano-Concave Lens is a divergent or negative lens, thicker at the edge than in the center and flat on one side. It forms a virtual image and is frequently used to extend the effective focal length of a converging lens when they are used as a pair. We suggest … Read More

Plano-Convex  Lenses have a positive focal length, making them ideal for collecting and focusing light in imaging applications. They are also useful in a variety of applications involving emitters, detectors, lasers, and fiber optics.

Negative achromatic lenses

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