Shape measurement of freeform optics

Andreas Beutler

doi:10.1117/12.2314588

15 June 2018 Shape measurement of freeform optics

Andreas Beutler

Proceedings Volume 10692, Optical Fabrication, Testing, and Metrology VI; 106920O (2018) https://doi.org/10.1117/12.2314588
Event: SPIE Optical Systems Design, 2018, Frankfurt, Germany

Abstract

Compared to spherical and aspherical lenses freeform shapes are much more challenging for the measurement required in the production process. A lot of metrology systems available for measuring spheres and aspheres are not capable of measuring freeforms. In addition lenses with a freeform surface may also contain reference elements whose position has to be determined. However, there are a few types of instruments which can in principle perform measurements of freeforms. Challenges of measuring freeforms are discussed and different types of potential measuring instruments and their capabilities are presented. This is demonstrated providing measuring results from different samples measured with different instruments.

Citation Download Citation

Andreas Beutler "Shape measurement of freeform optics", Proc. SPIE 10692, Optical Fabrication, Testing, and Metrology VI, 106920O (15 June 2018); https://doi.org/10.1117/12.2314588

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