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On April 11th, 2018, at the 5th European Seminar on Precision Optics Manufacturing in Teisnach, Germany, Dr。 Christian Buss presents key facts that make alignment turning an efficient production technology for objective lenses。

Event:
5th European Seminar on Precision Optics Manufacturing
April 10 - 11, 2018


Location:
Technologiecampus Teisnach THD Deggendorf
Technologiecampus 1
94244 Teisnach 
Germany

 

Efficient Assembly of Lens Objectives Using Sub-Cell Alignment Turning

Increasing demands for single lenses and lens systems influence in particular their production technology. It has become unfeasible – both technologically as well as financially – to manually adjust lenses in pre-assembled objectives. In recent years, it has thus become desirable to automate many steps of the process to chain. This enables new assembly strategies that allow for tilt and air gap accuracies in the micron range and drastically reduces the time and manual labor of manually correcting for astigmatism and coma at the same time.

The effective solution for the production of small and high quality lens systems is the assembly of lenses mounted in sub-cells and adapted with alignment turning. The alignment turning process relies on an automatic alignment chuck to align the optical axis of a mounted lens to the spindle axis of the machine. Subsequently, the mount is cut with diamond tools on a lathe with respect to the optical axis of the mount. Software controlled integrated measurement technology ensures highest precision. In addition to traditional production processes, further dimensions can be controlled in a very precise manner, e.g. the air gaps between the lenses. Using alignment turning simplifies further alignment steps and reduces the risk for errors during assembly.

This contribution describes the recent progress in efficient manufacturing of small and precise lens systems, explains the measurement technology behind the process, presents the used alignment turning technique itself and outlines strengths and limitations of this method in comparison to traditional methods of objective lens assembly.

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