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Proceedings Paper

Development of a miniature multiple reference optical coherence tomography imaging device
Author(s): Paul M. McNamara; Colm O'Riordan; Seán Collins; Peter O'Brien; Carol Wilson; Josh Hogan; Martin J. Leahy
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Paper Abstract

Multiple reference optical coherence tomography (MR-OCT) is a new technology ideally suited to low-cost, compact OCT imaging. This modality is an extension of time-domain OCT with the addition of a partial mirror in front of the reference mirror. This enables extended, simultaneous depth scanning with the relatively short sweep of a miniature voice coil motor on which the scanning mirror is mounted. Applications of this technology include biometric security, ophthalmology, personal health monitoring and non-destructive testing. This work details early-stage development of the first iteration of a miniature MR-OCT device. This device utilizes a fiber-coupled input from an off-board superluminescent diode (SLD). Typical dimensions of the module are 40 × 57 mm, but future designs are expected to be more compact. Off-the-shelf miniature optical components, voice coil motors and photodetectors are used, with the complexity of design depending on specific applications. The photonic module can be configured as either polarized or non-polarized and can include balanced detection. The photodetectors are directly connected to a printed circuit board under the module containing a transimpedance amplifier with complimentary outputs. The results shown in this work are from the non-polarized device. Assembly of the photonic modules requires extensive planning. In choosing the optical components, Zemax simulations are performed to model the beam characteristics. The physical layout is modeled using Solidworks and each component is placed and aligned via a well-designed alignment procedure involving an active-alignment pick-and-place assembly system.

Paper Details

Date Published: 7 March 2016
PDF: 4 pages
Proc. SPIE 9699, Optics and Biophotonics in Low-Resource Settings II, 969909 (7 March 2016); doi: 10.1117/12.2211309
Show Author Affiliations
Paul M. McNamara, National Univ. of Ireland, Galway (Ireland)
Compact Imaging, Inc. (United States)
Colm O'Riordan, Tyndall National Institute (Ireland)
Seán Collins, Tyndall National Institute (Ireland)
Peter O'Brien, Tyndall National Institute (Ireland)
Carol Wilson, Compact Imaging, Inc. (United States)
Josh Hogan, Compact Imaging, Inc. (United States)
Martin J. Leahy, National Univ. of Ireland, Galway (Ireland)

Published in SPIE Proceedings Vol. 9699:
Optics and Biophotonics in Low-Resource Settings II
David Levitz; Aydogan Ozcan; David Erickson, Editor(s)

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