Beam-shifting optical coherence tomography for speckle reduction and flow rate measurement

Chaoliang Chen; Weisong Shi; Jamil Jivraj; Yuta Dobashi; Wanrong Gao; Victor X. D. Yang

doi:10.1117/12.2538105

20 November 2019 Beam-shifting optical coherence tomography for speckle reduction and flow rate measurement

Chaoliang Chen, Weisong Shi, Jamil Jivraj, Yuta Dobashi, Wanrong Gao, Victor X. D. Yang

Proceedings Volume 11190, Optics in Health Care and Biomedical Optics IX; 111900W (2019) https://doi.org/10.1117/12.2538105
Event: SPIE/COS Photonics Asia, 2019, Hangzhou, China

Abstract

In this paper, beam-shifting optical coherence tomography (BSOCT) is presented for speckle reduction and flow rate measurement. The sample beam is rotated about the optical axis of the objective lens to modulate the incident angle on sample; 17 and 3 incident angles are respectively performed for speckle reduction and flow rate measurement. The performance of the proposed technique is investigated on both phantom and in vivo experiments. By combining a 2D micro-electro-mechanical system (MEMS) and a zigzag scanning protocol, the frame rates of 45.2 Hz for speckle reduction and 25.6 Hz for flow rate measurement are achieved. With beam-shifting angle of 4.76º, the speckle noise reduction of 91% and the flow rate measurement precision of 0.0019 μl/s are achieved.

Citation Download Citation

Chaoliang Chen, Weisong Shi, Jamil Jivraj, Yuta Dobashi, Wanrong Gao, and Victor X. D. Yang "Beam-shifting optical coherence tomography for speckle reduction and flow rate measurement", Proc. SPIE 11190, Optics in Health Care and Biomedical Optics IX, 111900W (20 November 2019); https://doi.org/10.1117/12.2538105

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