Swept-source common-path optical coherence tomography with a MEMS endoscopic imaging probe

Can Duan; Donglin Wang; Zhengwei Zhou; Peng Liang; Sean Samuelson; Antonio Pozzi; Huikai Xie

doi:10.1117/12.2036574

4 March 2014 Swept-source common-path optical coherence tomography with a MEMS endoscopic imaging probe

Can Duan, Donglin Wang, Zhengwei Zhou, Peng Liang, Sean Samuelson, Antonio Pozzi, Huikai Xie

Proceedings Volume 8934, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVIII; 89342N (2014) https://doi.org/10.1117/12.2036574
Event: SPIE BiOS, 2014, San Francisco, California, United States

Abstract

A MEMS-based common-path endoscopic imaging probe for 3D swept-source optical coherence tomography (SSOCT) has been developed. The common path is achieved by setting the reference plane at the rear surface of the GRIN lens inside the probe. MEMS devices have the advantages of low cost, small size and fast speed, which are suitable for miniaturizing endoscopic probes. The aperture size of the two-axis MEMS mirror employed in this endoscopic probe is 1 mm by 1 mm and the footprint of the MEMS chip is 1.55 mm by 1.7 mm. The MEMS mirror achieves large two dimensional optical scan angles up to 34° at 4.0 V. The endoscopic probe using the MEMS mirror as the scan engine is only 4.0 mm in diameter. Additionally, an optimum length of the GRIN lens is established to remove the artifacts in the SSOCT images generated from the multiple interfaces inside the endoscopic imaging probe. The MEMS based commonpath probe demonstrates real time 3D OCT images of human finger with 10.6 μm axial resolution, 17.5 μm lateral resolution and 1.0 mm depth range at a frame rate of 50 frames per second.

Citation Download Citation

Can Duan, Donglin Wang, Zhengwei Zhou, Peng Liang, Sean Samuelson, Antonio Pozzi, and Huikai Xie "Swept-source common-path optical coherence tomography with a MEMS endoscopic imaging probe", Proc. SPIE 8934, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVIII, 89342N (4 March 2014); https://doi.org/10.1117/12.2036574

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