High-speed automatically aligning tabletop optical beam scanning device for OCT

J. Kenji Clark; Shigeru Nakamura

doi:10.1117/12.2652141

8 March 2023 High-speed automatically aligning tabletop optical beam scanning device for OCT

J. Kenji Clark, Shigeru Nakamura

Proceedings Volume 12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII; 123670D (2023) https://doi.org/10.1117/12.2652141
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

Optical coherence tomography (OCT) has steadily increased in scope with new applications continuing to arise. However, a major obstacle to the more widespread use of OCT is the limited scan area that can be achieved. In recent years, OCT systems using 3D eye tracking technologies and robotic arms for automatic detection and alignment of an OCT imaging system with a patient’s eye in ophthalmology have been demonstrated. This has enabled OCT without the need for precise manual alignment and stabilization of patients in ophthalmology. For non-clinical and low-cost applications, however, simple and compact automatically aligning OCT systems still need to be developed. In this work, a high-speed automatically aligning tabletop OCT beam scanning device with a simple and compact design incorporating a stereo camera and a high-speed translation stage is presented. The device automatically detects regions of interest on a sample in a 7.5×7.5cm area above the scanner, locates their three-dimensional position, and performs a synchronous alignment and scanning procedure to obtain high-quality OCT data from multiple regions at high speed. The acquisition of epidermal and dermal fingerprints for OCT-based fingerprint recognition is demonstrated. Four fingers on a user’s hand are detected, located in three-dimensional space and sequentially scanned in less than 2.3s, with the potential for scan times as low as 1.3s with faster lasers. It is envisioned that this compact tabletop scanner will enable a variety of applications in biometrics, dermatology and non-destructive testing where the high-speed acquisition of high-quality tomographic images with a compact device is desirable.

Conference Presentation

Citation Download Citation

J. Kenji Clark and Shigeru Nakamura "High-speed automatically aligning tabletop optical beam scanning device for OCT", Proc. SPIE 12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII, 123670D (8 March 2023); https://doi.org/10.1117/12.2652141

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