Dynamic Observation of Sweat Glands of Human Finger Tip Using All-Optical-Fiber High-Speed Optical Coherence Tomography

AbstractWe present an approach for polarization sensitive optical coherence tomography (PS-OCT) that solely requires a modification of the light source, a buffered swept source laser. For this purpose a single-mode fiber-based Fourier domain mode locked laser is extended by fourfold buffering with manual fiber polarization controllers to emit alternating sweep polarizations, while the polarization contrast calibration is realized by a high-speed polarimeter. As the introduced setup utilizes standard scanning and detection units, the proposed method is a promising way to enhance various swept source OCT systems by polarization sensitive imaging. Preliminary measurements of a human finger nail with different polarization contrasts demonstrate the feasibility of the concept.

Download Full-text

High-speed imaging with endoscopic optical coherence tomography using bending vibration of optical fiber

10.1117/12.835280 ◽

2009 ◽

Cited By ~ 3

Author(s):

Ryoichi Isago ◽

Kentaro Nakamura

Keyword(s):

Optical Coherence Tomography ◽

Optical Fiber ◽

High Speed ◽

Optical Coherence ◽

High Speed Imaging ◽

Bending Vibration ◽

Endoscopic Optical Coherence Tomography

Download Full-text

All optical fiber combined-imaging system of photoacoustic and optical coherence tomography

10.1117/12.2212759 ◽

2016 ◽

Cited By ~ 1

Author(s):

Jonghyun Eom ◽

Jun Geun Shin ◽

Soongho Park ◽

Byeong Ha Lee

Keyword(s):

Optical Coherence Tomography ◽

Optical Fiber ◽

Imaging System ◽

Optical Coherence ◽

All Optical ◽

Combined Imaging

Download Full-text

DEVELOPMENT OF HIGH-SPEED SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY SYSTEM AT 1320 nm

Journal of Innovative Optical Health Sciences ◽

10.1142/s1793545809000383 ◽

2009 ◽

Vol 02 (01) ◽

pp. 117-122 ◽

Cited By ~ 1

Author(s):

TONG WU ◽

ZHIHUA DING ◽

MINGHUI CHEN ◽

LEI XU ◽

GUOHUA SHI ◽

...

Keyword(s):

Optical Coherence Tomography ◽

High Speed ◽

Calibration Method ◽

Wave Number ◽

Laser Source ◽

Depth Range ◽

Optical Coherence ◽

Swept Source ◽

Human Finger

A swept-source optical coherence tomography (SSOCT) system based on a high-speed scanning laser source at center wavelength of 1320 nm and scanning rate of 20 kHz is developed. The axial resolution is enhanced to 8.3 μm by reshaping the spectrum in frequency domain using a window function and a wave number calibration method based on a Mach-Zender Interferometer (MZI) integrated in the SSOCT system. The imaging speed and depth range are 0.04 s per frame and 3.9 mm, respectively. The peak sensitivity of the SSOCT system is calibrated to be 112 dB. With the developed SSOCT system, optical coherence tomography (OCT) images of human finger tissue are obtained which enable us to view the sweat duct (SD), stratum corneum (SC) and epidermis (ED), demonstrating the feasibility of the SSOCT system for in vivo biomedical imaging.

Download Full-text

Laser Lens Size Measurement Using Swept-Source Optical Coherence Tomography

Applied Sciences ◽

10.3390/app10144936 ◽

2020 ◽

Vol 10 (14) ◽

pp. 4936

Author(s):

Pingping Jia ◽

Hong Zhao ◽

Yuwei Qin

Keyword(s):

Optical Coherence Tomography ◽

High Speed ◽

Wave Number ◽

Radius Of Curvature ◽

Optical Coherence ◽

Swept Source ◽

Laser Focusing ◽

Fitting Algorithm ◽

Laser Confocal Microscope ◽

Focusing Lens

A high-speed, high-resolution swept-source optical coherence tomography (SS-OCT) is presented for focusing lens imaging and a k-domain uniform algorithm is adopted to find the wave number phase equalization. The radius of curvature of the laser focusing lens was obtained using a curve-fitting algorithm. The experimental results demonstrate that the measuring accuracy of the proposed SS-OCT system is higher than the laser confocal microscope. The SS-OCT system has great potential for surface topography measurement and defect inspection of the focusing lens.

Download Full-text