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Glossary

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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Kellner Eyepiece

A type of eyepiece design consisting of a plano-convex field lens and a cemented doublet lens as the eye lens.

See also Huygenian Eyepiece, Periplan Eyepiece, Wide-Field Eyepiece

Kinematic Mount

A type of optical mount capable of six degrees of freedom that are singularly constrained during alignment. It is designed to minimize stress to the optics or optical assemblies it holds.

Knoop Hardness

A measure of material hardness. A higher Knoop hardness corresponds to a stronger material.