Improved sinusoidal phase plate to extend depth of field in incoherent hybrid imaging systems.

An improved sinusoidal phase plate is proposed by adding a new parameter to the conventional sinusoidal phase plate. A series of performance comparisons are made among various phase plates, including sinusoidal, cubic phase, and the modified logarithmic phase. The results demonstrate that the improved sinusoidal phase plate can further extend the depth of field in incoherent hybrid imaging systems, with lower surface relief phase structures fabricated in photoresist (AR-N 4340, ALL Resist, Germany).

[1]  Jorge Ojeda-Castañeda,et al.  Asymmetric phase masks for extended depth of field. , 2004, Applied optics.

[2]  W. Cathey,et al.  Phase plate to extend the depth of field of incoherent hybrid imaging systems. , 2004, Applied optics.

[3]  W. Cathey,et al.  Extended depth of field through wave-front coding. , 1995, Applied optics.

[4]  Hui Zhao,et al.  Optimized sinusoidal phase mask to extend the depth of field of an incoherent imaging system. , 2010, Optics letters.

[5]  Jorge Ojeda-Castañeda,et al.  High focal depth with fractional-power wave fronts. , 2004, Optics letters.

[6]  Adolf W. Lohmann,et al.  Bow-tie effect: differential operator , 2006 .

[7]  Hui Zhao,et al.  Optimized logarithmic phase masks used to generate defocus invariant modulation transfer function for wavefront coding system. , 2010, Optics letters.

[8]  Xutao Mo.  Optimized annular phase masks to extend depth of field. , 2012, Optics letters.

[9]  Shinichi Komatsu,et al.  Optimized free-form phase mask for extension of depth of field in wavefront-coded imaging. , 2008, Optics letters.

[10]  Yunlong Sheng,et al.  Polynomial phase mask for extending depth-of-field optimized by simulated annealing , 2007, SPIE/COS Photonics Asia.

[11]  Jianfeng Sun,et al.  Optimized phase pupil masks for extended depth of field , 2007 .

[12]  Hui Zhao,et al.  Improved logarithmic phase mask to extend the depth of field of an incoherent imaging system. , 2008, Optics letters.

[13]  Xiaocong Yuan,et al.  Enhanced Depth of Field in Integral Imaging for 3D Display With a Cubic Phase Plate Coded Camera Array , 2012, Journal of Display Technology.