14:15 - 14:45InvitedID: 493
/ TOM3 S02: 1
TOM 3 Optical System Design, Tolerancing and Manufacturing
Freeform metal optics for New Space applications
Matthias Beier
SPACEOPTIX GmbH, Germany
Freeform metal optics for New Space applications
14:45 - 15:00ID: 153
/ TOM3 S02: 2
TOM 3 Optical System Design, Tolerancing and Manufacturing
Zoom systems based on tunable lenses: a systematic first order design method
Leonhard Lenk, Beate Mitschunas, Stefan Sinzinger
Technische Universität Ilmenau, Germany
Various authors have shown that tunable lenses, whose refractive power can be varied e.g. by changing the curvature of a membrane, can replace the motion of lens groups in zoom systems. As with classical zoom systems, the first order layout has a major influence on the performance of the final system and, moreover, sets the requirements for the tunable lenses. We present a method for the analysis of the vast number of possible first order solutions for typical requirements and for the selection of most promising layouts.
15:00 - 15:15ID: 158
/ TOM3 S02: 3
TOM 3 Optical System Design, Tolerancing and Manufacturing
High-resolution measurement technology for the detection of complex process influences in machining operations
Till-Hendrik Hage1, Marco Fritzsche2, Sebastian Henkel1, Jens Bliedtner1
1Ernst-Abbe University of Applied Sciences Jena; 2Polytec GmbH
The purpose of this paper is to discuss the influences of vibrations on the quality of the machining results, which are caused on the one hand by the operating vibrations generated by the running spindle and on the other hand by resonance frequencies. In order to detect these influences, a modal analysis and a measurement of the operational deflection shape are carried out on an ultrasonic-assisted CNC grinding machine designed for machining of brittle materials and on a 5-axis-CNC universal milling machine using a three-dimensional scanning Laser Doppler vibrometer system.
15:15 - 15:30ID: 324
/ TOM3 S02: 4
TOM 3 Optical System Design, Tolerancing and Manufacturing
Systematical approach for deterministical Determiation of the laserpolishing processing window for new optical materials: smoothing and ablation
Jens Bliedtner, Oliver Faehnle, Kerstin Goetze, Anne-Marie Schwager
University of Alpplied Sciences Jena, Germany
Among the approximately 300 different processes for polishing high-performance optics, laser polishing is distinguished by the fact that it can be digitally controlled, does not introduce any contaminants, can process even the smallest concave radii of curvature without contact and it is extremely fast. Therefore, laser polishing is a promising polishing technology, which has not yet found its way into industrial application; this is mainly due to the complex process setup, where material-, laser- and engineering-technologies have to be combined on a high technology level.
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