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Proceedings Paper

Highest precision centering error measurement
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Paper Abstract

The optical imaging quality of objectives is mainly influenced by the errors of the mechanical alignment of the single elements. TRIOPTICS has developed a new technology called MultiLens® in order to measure the centering error of single lenses as well as complete objectives. It is possible to measure the tilt of each single optical surface inside of a mounted objective with highest precision. We achieve accuracies in the range of an arc second. During the measurement the deviation of each centre of curvature with respect to a reference axis is measured. These data are further processed in order to provide the shift and tilt of an individual lens or group of lenses with respect to a given reference axis. The knowledge of the centering error can be used to align actively single optical elements. Applications mainly include the measurement of cell phone and digital camera lenses. However, any type of objective lens from endoscope up to very complex objective lenses used in microlithography can be measured with highest accuracy.

Paper Details

Date Published: 14 May 2007
PDF: 4 pages
Proc. SPIE TD04, Optifab 2007: Technical Digest, TD040Z (14 May 2007); doi: 10.1117/12.719697
Show Author Affiliations
J. Heinisch, Trioptics GmbH (Germany)
E. Dumitrescu, Trioptics GmbH (Germany)
S. Krey, Trioptics GmbH (Germany)


Published in SPIE Proceedings Vol. TD04:
Optifab 2007: Technical Digest
James J. Kumler; Matthias Pfaff, Editor(s)

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