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Optical Engineering

Design of a variable diffractive zoom lens for interferometric purposes
Author(s): Alexander Bielke; Christof Pruss; Wolfgang Osten
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Paper Abstract

We present the design of a compact zoom-lens for the realization of a space-limited interferometer objective with a large range of possible sphere radii. Based on the idea of Alvarez to change the lens-power by shifting two glass plates with cubic surface functions along their lateral axis and the implementation with diffractive optical elements by Lohmann, we realized a focal shift between 200 and 360 mm with two elements in a single shift setup. Additionally, astigmatism can be compensated by moving the plates in the related orthogonal direction as required for the measurement of anamorphic, aspheric, or freeform lenses.

Paper Details

Date Published: 9 January 2017
PDF: 7 pages
Opt. Eng. 56(1) 014104 doi: 10.1117/1.OE.56.1.014104
Published in: Optical Engineering Volume 56, Issue 1
Show Author Affiliations
Alexander Bielke, Institut für Technische Optik (Germany)
Christof Pruss, Institut für Technische Optik (Germany)
Wolfgang Osten, Institut für Technische Optik (Germany)

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