Mr. Felix Jaeger Profile

Felix Jaeger

at TRIOPTICS GmbH

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Proceedings Article | 30 November 2023 Presentation + Paper

Decenter measurement of singlets and assembled optics containing cylindrical surfaces

Patrik Langehanenberg, Josef Heinisch, Felix Jäger

Proceedings Volume 12778, 1277809 (2023) https://doi.org/10.1117/12.2685221

KEYWORDS: Optical surfaces, Autocollimators, Cylindrical lenses, Reflection, Design and modelling, Anamorphic lenses, Singular optics, Calibration, Spherical lenses, Optical spheres

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Cylindrical lenses are becoming increasingly important in the optical industry. They are used, for example, in illumination systems in microlithography, in lenses for recording and projection of cinema productions or also in LIDAR systems, such as those increasingly used in the automotive sector. There are many variants of cylindrical lenses and thus also different parameters that need to be measured. In addition to the characterization of the centering errors of single lenses, it is also required to characterize the centering errors of already fully assembled anamorphic lenses. For a spherical surface it is sufficient to describe the centering error with a single parameter, the surface tilt error of the sphere. Geometrically, a cylindrical surface is described by a line. This is typically the cylinder axis or the apex line. The latter results from the projection of the cylinder axis onto the cylinder surface. For the complete description of the centering error of this line, in principle 3 quantities are needed: - The decentering (offset) of the cylinder axis to a given reference line. - The angle between the cylinder axis and the reference line. (“Clocking”) - The angle between the cylinder axis and a base plane (“Wedge error”) The reference line can be either a mechanical edge or another cylinder axis. The measurement procedures for all centering errors including measurement results of typical samples will be presented. Finally, we will present the so called MultiLens© measurements of an assembly of cylindrical lenses.

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