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Proceedings Paper

Optics optimization in high-resolution imaging module with extended depth of field
Author(s): Xi Chen; Dmitry Bakin; Changmeng Liu; Nicholas George
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Paper Abstract

The standard imaging lens for a high resolution sensor was modified to achieve the extended depth of field (EDoF) from 300 mm to infinity. In the module the raw sensor outputs are digitally processed to obtain high contrast images. The overall module is considered as an integrated computational imaging system (ICIS). The simulation results for illustrative designs with different amount of spherical aberrations are provided and compared. Based on the results of simulations we introduced the limiting value of the PSF Strehl ratio as the integral threshold criteria to be used during EDoF lens optimization. A four-element standard lens was modified within the design constraints to achieve the EDoF performance. Two EDoF designs created with different design methods are presented. The imaging modules were compared in terms of Strehl ratios, limiting resolution, modulation frequencies at 50% contrast, and SNR. The output images were simulated for EDoF modules, passed through the image processing pipeline, and compared against the images obtained with the standard lens module.

Paper Details

Date Published: 11 September 2008
PDF: 12 pages
Proc. SPIE 7061, Novel Optical Systems Design and Optimization XI, 706103 (11 September 2008); doi: 10.1117/12.795970
Show Author Affiliations
Xi Chen, Aptina Imaging (United States)
Dmitry Bakin, Aptina Imaging (United States)
Changmeng Liu, Aptina Imaging (United States)
Nicholas George, Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 7061:
Novel Optical Systems Design and Optimization XI
R. John Koshel; James D. Moore; David H. Krevor; G. Groot Gregory, Editor(s)

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