Lenslet

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A lenslet is literally a small lens. The fact that distinguishes it from a small lens is that it is part of a lenslet array. A lenslet array consists of a set of lenslets in the same plane. Each lenslet normally has the same focal length.

It has many uses but is commonly found in Shack–Hartmann wavefront sensors and beam homogenization optics for projection systems.^[1]

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