2021
DOI: 10.1109/tim.2021.3073701
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Ultrahigh-Speed Spectral-Domain Optical Coherence Tomography up to 1-MHz A-Scan Rate Using Space–Time-Division Multiplexing

Abstract: The primary optimization of the imaging speed of optical coherence tomography (OCT) has been keenly studied. In order to overcome the major speed limitation of spectral-domain OCT (SD-OCT), we developed an ultrahigh speed SD-OCT system, with an A-scan rate of up to 1 MHz, using the method of spacetime division multiplexing (STDM). Multi-cameras comprising a single spectrometer was implemented in the developed ultrahighspeed STDM method to eliminate the dead time of operation, whereas space-time division multip… Show more

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Cited by 21 publications
(9 citation statements)
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References 42 publications
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“…However, only a portion of it is displayed on the monitor due to the image-output speed limitation. 44 The experimental results confirmed that the SNR was improved by increasing the intensity of the scattered and reflected signals coming from the sample stage by increasing the camera exposure time. Considering the 3D volume data acquisition speed and the SNR of the image, we used an A-scan rate of 40 kHz to obtain a stable image.…”
Section: Signal Processingsupporting
confidence: 52%
See 1 more Smart Citation
“…However, only a portion of it is displayed on the monitor due to the image-output speed limitation. 44 The experimental results confirmed that the SNR was improved by increasing the intensity of the scattered and reflected signals coming from the sample stage by increasing the camera exposure time. Considering the 3D volume data acquisition speed and the SNR of the image, we used an A-scan rate of 40 kHz to obtain a stable image.…”
Section: Signal Processingsupporting
confidence: 52%
“…The data obtained from the frame grabber are accumulated in the queue buffer in real time, and the operation of one B‐scan using CUDA can be conducted in ≤4 ms. However, only a portion of it is displayed on the monitor due to the image‐output speed limitation 44 . The experimental results confirmed that the SNR was improved by increasing the intensity of the scattered and reflected signals coming from the sample stage by increasing the camera exposure time.…”
Section: Methodsmentioning
confidence: 61%
“…Large-range imaging means that the depth of MNA penetration can be probed more precisely, and high-speed imaging makes it possible that real-time video imaging analysis of the process of MNA penetration and the change of the pore channel after extraction. Currently, OCT large-range imaging is mainly used to increase the axial depth by suppressing the conjugate mirror [ 135 , 136 ] and increasing the spectrometer resolution [ 137 , 138 ], while OCT high-speed imaging techniques can be briefly grouped into two categories, one relying mainly on increasing the line scan frequency of the line array camera or introducing a high-speed scanning light source and the other by modifying the imaging strategy including setting up multiple line array cameras in the spectrometer and acquiring spectra alternately to achieve an exponential increase in imaging speed [ 19 , 139 , 140 ].…”
Section: Discussionmentioning
confidence: 99%
“…Thanks to their real-time imaging capabilities and excellent axial and spatial resolution, optical interference tomography devices are used as major examination tools for ophthalmology, dermatology, oncology, and dentistry [2][3][4][5][6][7][8]. In addition to medical and biomedical applications, optical interference tomography devices are widely applied, including industrial and agricultural applications [9][10][11]. Optical interference tomography was initially developed as desktop (benchtop) imaging equipment, but several miniaturizations of the system configuration were performed by implementing portable sample inspection probes and small spectroscopy [12,13].…”
Section: Introductionmentioning
confidence: 99%