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Construction, Specification, and Mathmatical Description of Aspheric Surfaces

Smith, George & Atchison, David A. (1983) Construction, Specification, and Mathmatical Description of Aspheric Surfaces. American Journal of Optometry and Physiological Optics, 60(3), pp. 216-223.

Abstract

Rotationally symmetrical aspheric surfaces of spectacle lenses are constructed as either "zonal aspherics" or "continuous aspherics." Zonal aspherics consist of annular zones surrounding a central zone with each zone being nominally spherical with progressively lower surface power the farther the zone is from the surface vertex. Aspheric surfaces are often specified by the radial drop in surface power from the center of the edge of the lens (e.g., Welsh Four-drop), but for the description of continuous aspherics can be manipulated into different forms. Mathematical descriptions are given or developed which will enable theoretical assessment of the performances of all lenses with rotationally symmetrical aspheric surfaces.

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ID Code: 4649
Item Type: Journal Article
Additional Information: Self-archiving of the author-version is not yet supported by this publisher. For more information, please refer to the journal's website (see link) or contact the author. Author contact details: David A. Atchison d.atchison@qut.edu.au
Additional URLs:
Keywords: aphakia, aspheric lens, continuous aspheric, zonal aspheric
ISSN: 1538-9235
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 1983 Lippincott Williams & Wilkins
Deposited On: 17 Aug 2006
Last Modified: 15 Jan 2009 17:08

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