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Proceedings Paper

A new foveated wide angle lens with high resolving power and without brightness loss in the periphery
Author(s): K. Wakamiya; T. Senga; K. Isagi; N. Yamamura; Y. Ushio; N. Kita
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Paper Abstract

A new foveated wide angle lens with high resolving power and without brightness loss in the periphery is developed. A "foveated lens" is an optical system which has both a large field of view and a high resolution in the center of the view field. While it is ideal to keep uniform brightness in the whole view field, widening the field of view without loosing brightness in the periphery had not been achieved by several previous designs and fabrications. In the new design, telecentric light is kept on the image side and a more negative distortion is added to the sine law. As a result, more than 140 degrees view field is achieved with very little loss of brightness in the periphery. The evaluation methods and results for the fundamental optical performance of the fabricated lenses are described. The performance of the proposed lens for several basic visual tasks, such as the readability of characters, the visibility in the view circumference, and the possibility of stereo vision, are compared with that of other optical systems which have a wide field of view. The prospective applications of the proposed lens is also discussed.

Paper Details

Date Published: 6 December 2005
PDF: 10 pages
Proc. SPIE 6051, Optomechatronic Machine Vision, 605107 (6 December 2005); doi: 10.1117/12.650967
Show Author Affiliations
K. Wakamiya, Nikon Corp. (Japan)
T. Senga, Nikon Corp. (Japan)
K. Isagi, Nikon Corp. (Japan)
N. Yamamura, Nikon Corp. (Japan)
Y. Ushio, Nikon Corp. (Japan)
N. Kita, National Institute of Advanced Industrial Science and Technology (Japan)

Published in SPIE Proceedings Vol. 6051:
Optomechatronic Machine Vision
Kazuhiko Sumi, Editor(s)

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