Solutions for a high-speed wide-angle zoom lens with aspheric surfaces

Takanori Yamanashi

doi:10.1117/12.930547

19 October 2012 Solutions on a high-speed wide-angle zoom lens with aspheric surfaces

Takanori Yamanashi

Author Affiliations +

Proceedings Volume 8488, Zoom Lenses IV; 84880I (2012) https://doi.org/10.1117/12.930547
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

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.

Citation Download Citation

Takanori Yamanashi "Solutions on a high-speed wide-angle zoom lens with aspheric surfaces", Proc. SPIE 8488, Zoom Lenses IV, 84880I (19 October 2012); https://doi.org/10.1117/12.930547

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