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Proceedings Paper

Design of vari-focal panoramic annular lenses based on Alvarez surfaces
Author(s): Yujie Luo; Jian Bai; Yuan Yao
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Paper Abstract

We propose a novel design of panoramic annular lenses (PAL) for the imaging of 360° surroundings with a large field of view (FOV) ranging from 30°~105°, which can partly realize the zooming function. Its wavelength band is between 486 and 656 nanometers. The conventional vari-focal PAL is based on the axial shift of some optical components, which will make the blind zone larger and out of the sensing area, while our design is based on the lateral shift, which can make some imaging area zoom in, keep the area of blind zone stay the same, and minimize the whole scale of this system. In order to change the focal length of conventional PAL system, we introduce several pairs of free-form surfaces (Alvarez surfaces) which can be regarded as several plano-spherical lenses and change the focal power of the whole optical system. As we set two different configurations (long focal length and wide angle), all of the optical parameters are designed and optimized with the help of the software (Zemax).

Paper Details

Date Published: 5 November 2014
PDF: 8 pages
Proc. SPIE 9272, Optical Design and Testing VI, 927216 (5 November 2014); doi: 10.1117/12.2071224
Show Author Affiliations
Yujie Luo, Zhejiang Univ. (China)
Jian Bai, Zhejiang Univ. (China)
Yuan Yao, Huazhong Institute of Electro-Optics Wuhan National Lab. for Optoelectronics (China)

Published in SPIE Proceedings Vol. 9272:
Optical Design and Testing VI
Yongtian Wang; Chunlei Du; José Sasián; Kimio Tatsuno, Editor(s)

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