Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Friedrich-schiller-universitat Jena

Ralf Steinkopf

Christoph Damm

Thomas Peschel

Stefan Risse

Stefan Nolte

Andreas Gebhardt

Sebastian Scheiding

Herbert Gross

Christian Vetter

Marco Ornigotti

Alexander Szameit

Chistian Vetter

The invention relates to an arrangement for producing a Bessel beam (), comprising a beam-forming element (), which transforms a beam () incident as a plane electromagnetic wave into a Bessel beam (). According to the invention, the beam-forming element () comprises at least one annular lens (') and a Fourier optical unit, e.g. in the form of a Fourier lens ().

Arrangement for producing a Bessel beam

The invention relates to a method for producing an optical assembly, comprising at least two optical functional surfaces arranged in a fixed positional relationship to one another on a common supporting structure, wherein by means of a processing machine, in various process steps, at least two optical functional surfaces and at least one reference structure having a defined and measurable relative position to the optical functional surfaces are produced. The supporting structure remains rigidly connected to the processing machine until said process steps have been completed, and wherein the optical functional surfaces are then measured relative to the at least one reference structure, and any deviation from a target shape and target position is determined, after which said process steps are repeated at least once with modified actuation of the processing machine. The invention further relates to an optical device comprising an optical assembly produced in this way and to a unit for carrying out such a method.

Method for producing an optical assembly having at least two optical functional surfaces, an optical device and unit for carrying out the method

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Jena, Germany

Ralf Steinkopf