{"id":454,"date":"2026-03-03T17:30:41","date_gmt":"2026-03-03T16:30:41","guid":{"rendered":"https:\/\/mandler-engineering.de\/?post_type=projekte&p=454"},"modified":"2026-04-20T11:26:27","modified_gmt":"2026-04-20T09:26:27","slug":"asphaerenbearbeitung","status":"publish","type":"projekte","link":"https:\/\/mandler-engineering.de\/en\/projekte\/asphaerenbearbeitung\/","title":{"rendered":"VGP Polishing Process"},"content":{"rendered":"

\u2190 Alle Projekte<\/a><\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/section>

PROJECT<\/h4>\n<\/div><\/div>

VGP Polishing Process<\/h1>
New machine concept for polishing large high-performance optics<\/h6>\n<\/div><\/div>
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Das VGP-Verfahren (Vertikales Gravitations Polieren) ist ein neu entwickeltes Polierverfahren zur automatisierten Bearbeitung gro\u00dfer optischer Bauteile. Es erweitert das bekannte Prinzip des Kugelstiftpolierens um eine K\u00e4figf\u00fchrung: Die Linse wird spannungsfrei \u00fcber einen K\u00e4fig gef\u00fchrt und ausschlie\u00dflich durch ihre Eigengewichtskraft auf das Werkzeug gedr\u00fcckt. Die R\u00fcckseite der Linse bleibt dabei vollst\u00e4ndig zug\u00e4nglich und erlaubt eine gezielte Manipulation der Form \u00fcber lokal aufgebrachten Zusatzdruck. Durch diese offene Kinematik entstehen neue Freiheitsgrade, die eine pr\u00e4zise Steuerung des Materialabtrags \u00fcber die gesamte Fl\u00e4che erm\u00f6glichen. Das Verfahren arbeitet mit unterschiedlichsten Suspensionen und ist auf Bauteile bis 300 mm Durchmesser ausgelegt \u2014 skalierbar bis zu einem theoretischen Durchmesser von 2 m. Mehrere Patente sch\u00fctzen sowohl die Maschinenkinematik als auch die Verfahren zur Druckaufbringung \u00fcber die offene R\u00fcckseite.<\/p>\n<\/div><\/div><\/div><\/div>

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< 10nm RMS<\/h5>\n

Accuracy<\/p>\n<\/div><\/div><\/div><\/div>

< 10nm RMS<\/h5>\n

Accuracy<\/p>\n<\/div><\/div><\/div><\/div>

< 10nm RMS<\/h5>\n

Accuracy<\/p>\n<\/div><\/div><\/div><\/div>

< 10nm RMS<\/h5>\n

Accuracy<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/section>

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Challenge<\/h3>\n<\/div>\n<\/div><\/div>

The production of large optics is under increasing pressure: rising quantities, higher accuracy requirements, and tight manufacturing tolerances are met by a growing shortage of experienced skilled workers. Classic polishing methods for large diameters are highly manual and therefore only partially automatable. This limits both economic viability and reproducibility \u2013 and makes scaling up production increasingly difficult.<\/p>\n<\/div><\/div><\/div><\/div>

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Solution<\/h3>\n<\/div>\n<\/div><\/div>

The VGP process addresses these challenges through a fundamentally new machine kinematics. The stress-free cage guide and access to the rear of the lens open up intervention possibilities that were not possible with previous systems: form deviations can be corrected in a targeted and localised manner, the process is fully automatable and repeatable. This reduces the dependence on specialised personnel while increasing accuracy and throughput.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/section>

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Advantages<\/h3>\n<\/div>\n
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  • Automatisable<\/strong> Reproducible processes instead of manual polishing \u2014 independent of the availability of specialised skilled workers.<\/li>\n
  • Scalable up to 1 m diameter:<\/strong> A process for the complete spectrum from precision optics to large optics.<\/li>\n
  • Targeted shape correction<\/strong> Local pressure application through the open back enables accuracies that are unattainable with classical methods.<\/li>\n
  • Flexible in use<\/strong> Compatible with a wide range of suspensions \u2014 adaptable to material and requirements.<\/li>\n
  • Patented:<\/strong> Multiple patents on kinematics and pressure application secure the technological lead.<\/li>\n<\/ul>\n<\/div><\/div>

    Insights<\/p>\n<\/div><\/div>

    Project images<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/section>

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