Share Email Print
cover

Proceedings Paper • new

A multi-regions electrically tunable liquid crystal microlens array for extending the depth of field
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Depth of field (DOF), which is also called the effective focusing range, is a basic parameter for imaging systems. Usually, after the focusing, a clear image acceptable within a certain range before and after the focus is expressed. The length of this range is called the DOF. According to the definition of DOF, for a lens with a fixed focal length, the image formed by an object outside the depth of field is blurred, which means that sufficient information will not be obtained. For conventional imaging systems, a relatively large DOF can be achieved by reducing the aperture, but this will reduce the amount of incident light, thereby reducing the system imaging quality. In this paper, we propose a multi-regions electrically tunable liquid crystal microlens array (LCMLA), which is fabricated according to traditional photolithography and standard microelectronic techniques and divided into three sub-regions with three independent electrodes. It can apply different voltages on different sub-regions to obtain different DOF corresponding to them. Based on this, it will be possible to clearly image objects in field of view (FOV) that are outside the depth of field of one or more sub-regions at the same time, which means an extension of the DOF.

Paper Details

Date Published: 15 November 2018
PDF: 6 pages
Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109644J (15 November 2018); doi: 10.1117/12.2506112
Show Author Affiliations
Mingce Chen, Huazhong Univ. of Science and Technology (China)
Zhaowei Xin, Huazhong Univ. of Science and Technology (China)
Dong Wei, Huazhong Univ. of Science and Technology (China)
XingWang Xie, Huazhong Univ. of Science and Technology (China)
Xinyu Zhang, Huazhong Univ. of Science and Technology (China)
Haiwei Wang, Huazhong Univ. of Science and Technology (China)
Changsheng Xie, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 10964:
Tenth International Conference on Information Optics and Photonics
Yue Yang, Editor(s)

© SPIE. Terms of Use
Back to Top