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Proceedings Paper

Spherical coded imagers: improving lens speed, depth-of-field, and manufacturing yield through enhanced spherical aberration and compensating image processing
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Paper Abstract

Recently, joint analysis and optimization of both the optical sub-system and the algorithmic capabilities of digital processing have created new digital-optical imaging systems with system-level benefits. We explore a special class of digital-optical imaging systems called spherical coding that combine lens systems having controlled amounts of spherical aberration with digital sharpening filters to achieve fast, low-cost, extended depth-of-field (EDoF) imaging systems. We provide analysis of the optimal amount of spherical aberration required as a function of desired depth-of-field extension. We also characterize the MSE-optimal filters required to restore contrast. Finally, we describe a simple method to designing spherical coded systems and demonstrate several advantages such as improved manufacturing yield using an actual lens design.

Paper Details

Date Published: 21 August 2009
PDF: 12 pages
Proc. SPIE 7429, Novel Optical Systems Design and Optimization XII, 74290M (21 August 2009); doi: 10.1117/12.826609
Show Author Affiliations
M. Dirk Robinson, Ricoh Innovations, Inc. (United States)
Guotong Feng, Ricoh Innovations, Inc. (United States)
David G. Stork, Ricoh Innovations, Inc. (United States)

Published in SPIE Proceedings Vol. 7429:
Novel Optical Systems Design and Optimization XII
R. John Koshel; G. Groot Gregory, Editor(s)

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