14 September 2007 High-precision aspheres for professional cine lenses: design and manufacturing
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Abstract
The use of aspheres gives optical designers extended possibilities to develop lenses with higher speed, lower distortion and better performance in ever smaller dimensions which would be nearly impossible to realize in a mere spherical design. For the aspherical elements careful considerations on tolerancing, measurability and manufacturability are crucial both for the as-built performance and for ensuring stable and cost-effective machining. Close collaboration between optical design and the optical shop in charge is needed to ensure the best possible solution at minimum cost. High precision aspheres for professional cine lenses with deviations from their best-fit-sphere in the range of millimeters are presented. For them, figure errors down to 0.1 microns and slope errors down to 0.1' were achieved.
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Thomas Köhler, Christian Beder, "High-precision aspheres for professional cine lenses: design and manufacturing", Proc. SPIE 6671, Optical Manufacturing and Testing VII, 66710L (14 September 2007); doi: 10.1117/12.738543; https://doi.org/10.1117/12.738543
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