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Highly compact imaging using Bessel beams generated by ultraminiaturized multi-micro-axicon systems |
JOSA A, Vol. 29, Issue 5, pp. 808-816 (2012)
http://dx.doi.org/10.1364/JOSAA.29.000808
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Abstract
Employing Bessel beams in imaging takes advantage of their self-reconstructing properties to achieve small focal points while maintaining a large depth of focus. Bessel beams are efficiently generated using axicons, and their utility in scanning imaging systems, such as optical coherence tomography (OCT), has been demonstrated. As these systems are miniaturized to allow, for example, endoscopic implementations, micro-axicons are required to assure the maintenance of a large depth of focus. We demonstrate here the design, fabrication, and application of molded micro-axicons for use in silicon-based micro-optical benches. It is shown that arrangements of multiple convex and concave axicons may be implemented to optimize the depth of focus in a miniaturized OCT system, using a telescopic optical arrangement of considerably shorter optical system length than that achievable with classical micro-optics.
© 2012 Optical Society of America
OCIS Codes
(170.2150) Medical optics and biotechnology : Endoscopic imaging
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(230.3990) Optical devices : Micro-optical devices
(230.4000) Optical devices : Microstructure fabrication
(080.4225) Geometric optics : Nonspherical lens design
ToC Category:
Optical Devices
History
Original Manuscript: January 11, 2012
Revised Manuscript: February 21, 2012
Manuscript Accepted: February 21, 2012
Published: April 27, 2012
Virtual Issues
Vol. 7, Iss. 7 Virtual Journal for Biomedical Optics
Citation
Niklas Weber, Dominik Spether, Andreas Seifert, and Hans Zappe, "Highly compact imaging using Bessel beams generated by ultraminiaturized multi-micro-axicon systems," J. Opt. Soc. Am. A 29, 808-816 (2012)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-29-5-808
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