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Proceedings Paper

Dynamic optically multiplexed imaging
Author(s): Yaron Rachlin; Vinay Shah; R. Hamilton Shepard; Tina Shih
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Paper Abstract

Optically multiplexed imagers overcome the tradeoff between field of view and resolution by superimposing images from multiple fields of view onto a single focal plane. In this paper, we consider the implications of independently shifting each field of view at a rate exceeding the frame rate of the focal plane array and with a precision that can exceed the pixel pitch. A sequence of shifts enables the reconstruction of the underlying scene, with the number of frames required growing inversely with the number of multiplexed images. As a result, measurements from a sufficiently fast sampling sensor can be processed to yield a low distortion image with more pixels than the original focal plane array, a wider field of view than the original optical design, and an aspect ratio different than the original lens. This technique can also enable the collection of low-distortion, wide field of view videos. A sequence of sub-pixel spatial shifts extends this capability to allow the recovery of a wide field of view scene at sub-pixel resolution. To realize this sensor concept, a novel and compact divided aperture multiplexed sensor, capable of rapidly and precisely shifting its fields of view, was prototyped. Using this sensor, we recover twenty-four megapixel images from a four-megapixel focal plane and show the feasibility of simultaneous de-multiplexing and super-resolution.

Paper Details

Date Published: 4 September 2015
PDF: 9 pages
Proc. SPIE 9600, Image Reconstruction from Incomplete Data VIII, 960003 (4 September 2015); doi: 10.1117/12.2188756
Show Author Affiliations
Yaron Rachlin, MIT Lincoln Lab. (United States)
Vinay Shah, MIT Lincoln Lab. (United States)
R. Hamilton Shepard, MIT Lincoln Lab. (United States)
Tina Shih, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 9600:
Image Reconstruction from Incomplete Data VIII
Philip J. Bones; Michael A. Fiddy; Rick P. Millane, Editor(s)

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