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Proceedings Paper

Curved fiber bundles for monocentric lens imaging
Author(s): Salman Karbasi; Igor Stamenov; Nojan Motamedi; Ashkan Arianpour; Adam R. Johnson; Ron A. Stack; Chris LaReau; Ryan Tenill; Rick Morrison; Ilya P. Agurok; Joseph E. Ford
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Paper Abstract

Monocentric lenses allow high resolution panoramic cameras, where imaging fiber bundles transport the hemispherical image surface to conventional focal planes. Refraction at the curved image surface limits the field of view coupled through a single bundle of straight fibers to less than ±34°, even for NA 1 fibers. Previously we have demonstrated a nearly continuous 128° field of view using a single lens and multiple adjacent straight fiber-coupled image sensors, but this imposes mechanical complexity of fiber bundle shaping and integration. However, a 3D waveguide structure with internally curved optical fiber pathways can couple the full continuous field of view onto a single focal plane. Here, we demonstrate wide-field imaging using a monocentric lens and a single curved fiber bundle, showing that the 3D bundle formed from a tapered fiber bundle can be used for relaying a 128° field of view from a curved input to the planar output face. We numerically show the coupling efficiency of light to the tapered bundle for different field of views depends on the taper ratio of the bundle as well as center of the curvature chosen for polishing of the fiber bundle facet. We characterize a tapered fiber bundle by measuring the angle dependent impulse response, transmission efficiency and the divergence angle of the light propagating from the output end of the fiber.

Paper Details

Date Published: 3 September 2015
PDF: 7 pages
Proc. SPIE 9579, Novel Optical Systems Design and Optimization XVIII, 95790G (3 September 2015); doi: 10.1117/12.2188901
Show Author Affiliations
Salman Karbasi, Univ. of California, San Diego (United States)
Igor Stamenov, Univ. of California, San Diego (United States)
Nojan Motamedi, Univ. of California, San Diego (United States)
Ashkan Arianpour, Univ. of California, San Diego (United States)
Adam R. Johnson, Distant Focus Corp. (United States)
Ron A. Stack, Distant Focus Corp. (United States)
Chris LaReau, Distant Focus Corp. (United States)
Ryan Tenill, Distant Focus Corp. (United States)
Rick Morrison, Distant Focus Corp. (United States)
Ilya P. Agurok, Univ. of California, San Diego (United States)
Joseph E. Ford, Univ. of California, San Diego (United States)

Published in SPIE Proceedings Vol. 9579:
Novel Optical Systems Design and Optimization XVIII
G. Groot Gregory; Arthur J. Davis; Cornelius F. Hahlweg, Editor(s)

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