Special Section on Optical Computational Imaging

Shift-encoded optically multiplexed imaging

[+] Author Affiliations
Vinay Shah, Yaron Rachlin, R. Hamilton Shepard, Tina Shih

Massachusetts Institute of Technology, Lincoln Laboratory, Lexington, Massachusetts, United States

Opt. Eng. 56(4), 041314 (Mar 20, 2017). doi:10.1117/1.OE.56.4.041314
History: Received January 9, 2017; Accepted March 7, 2017
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Abstract.  In a multiplexed image, multiple fields-of-view (FoVs) are superimposed onto a common focal plane. The attendant gain in sensor FoV provides a new degree of freedom in the design of an imaging system, allowing for performance tradeoffs not available in traditional optical designs. We explore design choices relating to a shift-encoded optically multiplexed imaging system and discuss their performance implications. Unlike in a traditional imaging system, a single multiplexed image has a fundamental ambiguity regarding the location of objects in the image. We present a system that can shift each FoV independently to break this ambiguity and compare it to other potential disambiguation techniques. We then discuss the optical, mechanical, and encoding design choices of a shift-encoding midwave infrared imaging system that multiplexes six 15×15  deg FoVs onto a single one megapixel focal plane. Using this sensor, we demonstrate a computationally demultiplexed wide FoV video.

© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Vinay Shah ; Yaron Rachlin ; R. Hamilton Shepard and Tina Shih
"Shift-encoded optically multiplexed imaging", Opt. Eng. 56(4), 041314 (Mar 20, 2017). ; http://dx.doi.org/10.1117/1.OE.56.4.041314


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