Voice coil based robust and miniature optical delay for multiple reference optical coherence tomography

Roshan Dsouza; Hrebesh Subhash; Kai Neuhaus; Josh Hogan; Carol Wilson; Martin Leahy

doi:10.1117/12.2038471

26 February 2014 Voice coil based robust and miniature optical delay for multiple reference optical coherence tomography

Roshan Dsouza, Hrebesh Subhash, Kai Neuhaus, Josh Hogan, Carol Wilson, Martin Leahy

Author Affiliations +

Proceedings Volume 8942, Dynamics and Fluctuations in Biomedical Photonics XI; 894207 (2014) https://doi.org/10.1117/12.2038471
Event: SPIE BiOS, 2014, San Francisco, California, United States

Abstract

Multiple reference optical coherence tomography (MR-OCT) is a recently developed time-domain interferometeric imaging platform, which promises to fit into robust, cost-effective designs that are virtually solid state. An optical delay is created by the reference mirror which is mounted on a piezo-electric transducer (PZT) and the key element of MR-OCT technology is the presence of a partial mirror in front of the reference mirror. However, the limited axial displacement range at higher scanning-frequencies are a limitation of a PZT-based optical delay. Moreover, PZT-based actuators require a relatively high operational voltage and are expensive. In this paper we present a voice coil actuator as an alternative to a PZT-based optical delay. Voice coil actuators are light in weight, inexpensive and offer other advantages such as zero hysteresis, low operational voltage and a long life. We demonstrate a voice coil actuator as a feasible alternative to PZT-based actuators for the purpose of creating an optical delay, which can provide fast and precise axial displacements at high scanning rates.

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Roshan Dsouza, Hrebesh Subhash, Kai Neuhaus, Josh Hogan, Carol Wilson, and Martin Leahy "Voice coil based robust and miniature optical delay for multiple reference optical coherence tomography", Proc. SPIE 8942, Dynamics and Fluctuations in Biomedical Photonics XI, 894207 (26 February 2014); https://doi.org/10.1117/12.2038471

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