Abstract

To achieve a further extension of the depth of field in wavefront-coded imaging by reducing the impact of focus error in the optical transfer function, we propose the use of a free-form phase mask (FPM) instead of a conventional cubic phase mask (CPM). We optimized the shape of the FPM using the simulated annealing algorithm and confirmed that the optimized FPM provides a much larger focal tolerance and better final images than the CPM in the noise-free case.

© 2008 Optical Society of America

Extension ratio of depth of field by wavefront coding method

Chao Pan, Jiabi Chen, Rongfu Zhang, and Songlin Zhuang
Opt. Express 16(17) 13364-13371 (2008)

Analytical optimal solution of the extension of the depth of field using cubic-phase wavefront coding. Part I. Reduced-complexity approximate representation of the modulation transfer function

Saeed Bagheri, Paulo E. X. Silveira, and Daniela Pucci de Farias
J. Opt. Soc. Am. A 25(5) 1051-1063 (2008)

Optimized sinusoidal phase mask to extend the depth of field of an incoherent imaging system

Hui Zhao and Yingcai Li
Opt. Lett. 35(2) 267-269 (2010)

Analytical optical solution of the extension of the depth of field using cubic-phase wavefront coding. Part II. Design and optimization of the cubic phase

Saeed Bagheri, Paulo E. X. Silveira, Ramkumar Narayanswamy, and Daniela Pucci de Farias
J. Opt. Soc. Am. A 25(5) 1064-1074 (2008)

An optimal binary amplitude-phase mask for hybrid imaging systems that exhibit high resolution and extended depth of field

Eyal Ben-Eliezer, Naim Konforti, Benjamin Milgrom, and Emanuel Marom
Opt. Express 16(25) 20540-20561 (2008)