Analysis of a closed-boundary axilens with long focal depth and high transverse resolution based on rigorous electromagnetic theory

Abstract

We find that a microcylindrical axilens with a closed boundary and with an f-number less than 1 still can achieve the properties of long focal depth and high transverse resolution, unlike a microcylindrical axilens with an open boundary, which fails to maintain those properties for low f-numbers. The focusing characteristics of the closed-boundary axilens and the open-boundary axilens are numerically investigated based on the boundary integral method. The numerical results show that the ratio of the extended focal depth of the closed-boundary axilens to the focal depth of the conventional microlens can reach up to 1.26 and 2.12 for the preset focal depths 3 and 5 µm, respectively, even though the f-number is reduced to 1/3.

© 2002 Optical Society of America

Rigorous electromagnetic analysis of a microcylindrical axilens with long focal depth and high transverse resolution

Bi-Zhen Dong, Juan Liu, Ben-Yuan Gu, Guo-Zhen Yang, and Jian Wang
J. Opt. Soc. Am. A 18(7) 1465-1470 (2001)

Analysis of a cylindrical microlens array with long focal depth by a rigorous boundary-element method and scalar approximations

Jia-Sheng Ye, Bi-Zhen Dong, Ben-Yuan Gu, and Shu-Tian Liu
Appl. Opt. 43(27) 5183-5192 (2004)

Metallic cylindrical focusing micromirrors with long axial focal depth or increased lateral resolution

Guo-Ai Mei, Jia-Sheng Ye, Yan Zhang, and Jie Lin
J. Opt. Soc. Am. A 28(6) 1051-1057 (2011)

Analysis of low F-number dual micro-axilens array with binary structures by rigorous electromagnetic theory

Di Feng, Li-Shuang Feng, and Chun-Xi Zhang
Opt. Express 19(11) 10959-10966 (2011)

Rigorous concept for the analysis of diffractive lenses with different axial resolution and high lateral resolution

Feng Di, Yan Yingbai, Jin Guofan, and Wu Minxian
Opt. Express 11(17) 1987-1994 (2003)