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

The design of a circularly symmetric hybrid imaging system that exhibits high resolution as well as extended depth of field is presented. The design, which assumes spatially incoherent illumination, searches for an optimal "binary amplitude and phase" pupil mask, which for a certain desired depth of field, provides the largest spatial frequency band that assures a certain desired contrast value. The captured images are electronically processed by an off-line Wiener filter, to finally obtain high quality output images. Simulations as well as experimental results are provided.

[1]  M. Mino,et al.  Improvement in the OTF of a Defocused Optical System Through the Use of Shaded Apertures. , 1971, Applied optics.

[2]  B. R. Hunt,et al.  Karhunen-Loeve multispectral image restoration, part I: Theory , 1984 .

[3]  M Motamedi,et al.  Optical/digital incoherent image processing for extended depth of field. , 1987, Applied optics.

[4]  J Ojeda-Castaneda,et al.  High focal depth by apodization and digital restoration. , 1988, Applied optics.

[5]  J Ojeda-Castaneda,et al.  Arbitrarily high focal depth with a quasioptimum real and positive transmittance apodizer. , 1989, Applied optics.

[6]  L R Berriel-Valdos,et al.  Zone plate for arbitrarily high focal depth. , 1990, Applied optics.

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

[8]  J van der Gracht,et al.  Broadband behavior of an optical-digital focus-invariant system. , 1996, Optics letters.

[9]  Ajay Ghosh,et al.  High focal depth with a quasi-bifocus birefringent lens. , 2000, Applied optics.

[10]  N George,et al.  Electronic imaging using a logarithmic asphere. , 2001, Optics letters.

[11]  E Peli,et al.  Appearance of images through a multifocal intraocular lens. , 2001, Journal of the Optical Society of America. A, Optics, image science, and vision.

[12]  N. George,et al.  Computational imaging with the logarithmic asphere: theory. , 2003, Journal of the Optical Society of America. A, Optics, image science, and vision.

[13]  Sudhakar Prasad,et al.  Pupil-phase optimization for extended-focus, aberration-corrected imaging systems , 2004, SPIE Optics + Photonics.

[14]  Sudhakar Prasad,et al.  High‐resolution imaging using integrated optical systems , 2004, Int. J. Imaging Syst. Technol..

[15]  Sudhakar Prasad,et al.  Iris recognition with enhanced depth-of-field image acquistion , 2004, SPIE Defense + Commercial Sensing.

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

[17]  W.E. Snyder,et al.  Color image processing pipeline , 2005, IEEE Signal Processing Magazine.

[18]  Zeev Zalevsky,et al.  Experimental realization of an imaging system with an extended depth of field. , 2005, Applied optics.

[19]  Zeev Zalevsky,et al.  Radial mask for imaging systems that exhibit high resolution and extended depths of field. , 2006, Applied optics.

[20]  Emanuel Marom,et al.  Aberration-free superresolution imaging via binary speckle pattern encoding and processing. , 2007, Journal of the Optical Society of America. A, Optics, image science, and vision.

[21]  Emanuel Marom,et al.  Super resolution imaging with noise reduction and aberration elimination via random structured illumination and processing. , 2007, Optics express.