FOCtek offers five spherical lens forms or shaped lenses that determine imaging characteristics: convex, concave, double convex, double concave, and meniscus.
A flat convex lens has a positive focal length, which makes it an ideal lens for collecting and focusing light for many imaging applications...
A concave lens has a negative focal length and is used to restore an image or to spread light.
Double convex lenses with a focal length are suitable for 1:1 imaging and multi-element systems.Also known as biconvex or equiconvex.
Biconcave lenses with negative focal length are suitable for 1:1 imaging and multi-element imaging systems.Also known as double hole or equal hole.
A meniscal lens has a positive or negative focal length and forms a real or virtual image of the object.
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