Two methods for increasing the depth of focus of imaging systems

Emanuel Marom; E. Ben-Eliezer; Leonid P. Yaroslavsky; Zeev Zalevsky

doi:10.1117/12.519635

30 September 2003 Two methods for increasing the depth of focus of imaging systems

Emanuel Marom, E. Ben-Eliezer, Leonid P. Yaroslavsky, Zeev Zalevsky

Proceedings Volume 5227, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies; (2003) https://doi.org/10.1117/12.519635
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

Abstract

In this paper we describe two approaches for extending the depth of field in incoherent imaging system. The first one, a hybrid opto-digital incoherent imaging system, relies on an optical setup whereby the image is deliberately distorted, followed by a digital restoration stage. The second, an all-optical incoherent imaging system is based on a spatially code multiplexed multiple Fresnel lens mask, poisitioned in the lens aperture. Both provide a relatively high optical throughput and small contrast reduction, for an extremely wide range misfocus positions. For both cases, design considerations for an extended depth of field will be described. It is important to mention that both approaches are able to provide results in real time, thus enabling their usage in practical systems; yet the all-optical system presents a remarkable simplification.

Citation Download Citation

Emanuel Marom, E. Ben-Eliezer, Leonid P. Yaroslavsky, and Zeev Zalevsky "Two methods for increasing the depth of focus of imaging systems", Proc. SPIE 5227, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies, (30 September 2003); https://doi.org/10.1117/12.519635

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