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Proceedings Paper

Wide-field aspheric optics for visual applications
Author(s): Michael H. Freeman
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Paper Abstract

Aspheric surfaces provide a very necessary increase in the number of degrees of freedom needed to design wide-field eyepieces with large eye relief distance to focal length ratios. New economical diamond-turning lathes such as the Optoform 50 give a new flexibility to prototype manufacture with plastic materials which extends into medium-sized production quantities. This paper will explore the free use of aspherical surfaces in wide-field visual systems. The aspheric is now the general case and not a small modification of a spherical surface. The computing procedures used must provide the best balance between freedom and restraint.

Paper Details

Date Published: 23 August 1996
PDF: 11 pages
Proc. SPIE 2774, Design and Engineering of Optical Systems, (23 August 1996); doi: 10.1117/12.246693
Show Author Affiliations
Michael H. Freeman, Optics & Vision, Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 2774:
Design and Engineering of Optical Systems
Joseph J. M. Braat, Editor(s)

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