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Proceedings Paper • Open Access

Concept for a new approach to realize complex optical systems in high volume
Author(s): Heinrich Grüger; Jens Knobbe; Tino Pügner; Michael Leuckefeld; Peter Reinig; Sebastian Meyer

Paper Abstract

A groundbreaking new approach [1] for the fabrication of complex photonic systems, especially such with off-axis optics, has been invented based on planar mounting in combination with a novel folding approach.

Up to now volume production of photonic systems has been optimized for on-axis lens based optical systems. Chromatic aberration limits the usage or spectral range of these systems. Applying mirrors instead of lenses may help to suppress chromatic aberrations and wavelength depending absorption. The assembly of reflective optics, often in an off-axis configuration, is a complex process. So far most tools for volume production apply stacking of components in planar technology. Off-axis systems are typically assembled by more or less manually alignment of the components, which is not in favor for mass and low cost production of these systems.

The novel approach utilizers a planar substrate featuring preprocessed bending lines. A high accuracy tool for planar assembly places the components onto the substrate. Then the sides of the substrate are bent leading to a predefined three dimensional body. The off-axis optical path inside is generated automatically.

This concept is not limited to rectangular shapes but can also be applied to more complex systems, for example the so called “W-configuration” for a Czerny-Turner spectrometer.

First tests of the “bend and place assembly” have been performed successfully on a camera setup to prove the working principle.

Paper Details

Date Published: 16 October 2017
PDF: 11 pages
Proc. SPIE 10448, Optifab 2017, 1044803 (16 October 2017); doi: 10.1117/12.2279782
Show Author Affiliations
Heinrich Grüger, Fraunhofer-Institut für Photonische Mikrosysteme (Germany)
Jens Knobbe, Fraunhofer-Institut für Photonische Mikrosysteme (Germany)
Tino Pügner, Fraunhofer-Institut für Photonische Mikrosysteme (Germany)
Michael Leuckefeld, Fraunhofer-Institut für Photonische Mikrosysteme (Germany)
Peter Reinig, Fraunhofer-Institut für Photonische Mikrosysteme (Germany)
Sebastian Meyer, Fraunhofer-Institut für Photonische Mikrosysteme (Germany)

Published in SPIE Proceedings Vol. 10448:
Optifab 2017
Julie L. Bentley; Sebastian Stoebenau, Editor(s)

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