Distortion control for panoramic annular lens with Q-type aspheres

Xiangdong Zhou; Jian Bai

doi:10.1117/12.2071692

5 November 2014 Distortion control for panoramic annular lens with Q-type aspheres

Xiangdong Zhou, Jian Bai

Proceedings Volume 9272, Optical Design and Testing VI; 92721D (2014) https://doi.org/10.1117/12.2071692
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

As in fisheye lens, panoramic annular lens (PAL) has a big barrel distortion due to its large field of view. That has an apparent effect to its imaging performance such as pixel utilization and image resolution. If we manage to control the barrel distortion instead of only increasing it, the resulting system can gain better performance. In this paper we propose a method to control distortion that using Q-type aspheres. First, the Q-type aspheric polynomials and its advantages are introduced in the aspect of algorithm and fabrication relative to the traditional symmetrical polynomial-based aspheres. Then, an example design of PAL with Q-type aspheres using ZEMAX optical design package is presented. The designed PAL’s focal length is -1.25mm, F Number is about 5, distortion in all the fields of view are less than 1% under the f-θ distortion formation. The imaging quality of the optical system approached to diffraction limit. The result shows that Q-type aspheres has certain advantage in distortion control for PAL that can enhance imaging performance.

Citation Download Citation

Xiangdong Zhou and Jian Bai "Distortion control for panoramic annular lens with Q-type aspheres", Proc. SPIE 9272, Optical Design and Testing VI, 92721D (5 November 2014); https://doi.org/10.1117/12.2071692

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available