The need for fiducials on freeform optical surfaces

Kate Medicus; Jessica D. Nelson; Matthew Brunelle

doi:10.1117/12.2190970

3 September 2015 The need for fiducials on freeform optical surfaces

Kate Medicus, Jessica D. Nelson, Matthew Brunelle

Proceedings Volume 9582, Optical System Alignment, Tolerancing, and Verification IX; 958204 (2015) https://doi.org/10.1117/12.2190970
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

The evolution from spherical, to aspheric, to freeform optics is quickly progressing towards more complex freeform surfaces. Freeform surfaces typically have little to no symmetry making the alignment of the surfaces difficult. The alignment of such freeform surfaces relative to the other features on the optic has been little considered. A typical alignment specification like wedge (edge thickness difference) is not well defined for freeform optics, nor is the wedge measurement. We show that by using fiducials during the manufacturing of freeform surfaces, the alignment and locating of the freeform surface can be specified and measured.

Citation Download Citation

Kate Medicus, Jessica D. Nelson, and Matthew Brunelle "The need for fiducials on freeform optical surfaces", Proc. SPIE 9582, Optical System Alignment, Tolerancing, and Verification IX, 958204 (3 September 2015); https://doi.org/10.1117/12.2190970

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