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Proceedings Paper

Solutions for a high-speed wide-angle zoom lens with aspheric surfaces
Author(s): Takanori Yamanashi
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Paper Abstract

Recent development in CMOS and digital camera technology has accelerated the business and market share of digital cinematography. In terms of optical design, this technology has increased the need to carefully consider pixel pitch and characteristics of the imager. When the field angle at the wide end, zoom ratio, and F-number are specified, choosing an appropriate zoom lens type is crucial. In addition, appropriate power distributions and lens configurations are required. At points near the wide end of a zoom lens, it is known that an aspheric surface is an effective means to correct off-axis aberrations. On the other hand, optical designers have to focus on manufacturability of aspheric surfaces and perform required analysis with respect to the surface shape. Centration errors aside, it is also important to know the sensitivity to aspheric shape errors and their effect on image quality. In this paper, wide angle cine zoom lens design examples are introduced and their main characteristics are described. Moreover, technical challenges are pointed out and solutions are proposed.

Paper Details

Date Published: 19 October 2012
PDF: 14 pages
Proc. SPIE 8488, Zoom Lenses IV, 84880I (19 October 2012); doi: 10.1117/12.930547
Show Author Affiliations
Takanori Yamanashi, Panavision Inc. (United States)

Published in SPIE Proceedings Vol. 8488:
Zoom Lenses IV
Ellis I. Betensky; Takanori Yamanashi, Editor(s)

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