High-speed linear detection time domain optical coherence tomography with reflective grating-generated spatial reference delay.
We developed a high-speed linear detection time-domain optical coherence tomography (OCT) technique that detected a reflective grating-generated spatial optical delay in the reference arm using a line scan camera during probe-beam scanning. Using an InGaAs line scan camera (512 pixels) operating at 47,000 lines/s, the calculation of the absolute value of the difference between two sequential lines can be approximately displayed as cross-sectional images with 500 lateral pixels at 94 frames/s . After data acquisition, we performed postprocessing that involves a Hilbert transform to improve the image quality of an OCT image. Our OCT system was successfully used to image a human finger in vivo with 93 dB sensitivity.
Watanabe
Yuuki
Y
Faculty of Engineering, Yamagata University, 4-3-16 Johnan, Yonezawa, Yamagata, 992-8510, Japan. ywata@yz.yamagata-u.ac.jp
Sajima
Fumitoshi
F
Itagaki
Toshiki
T
Watanabe
Kei
K
Shuto
Yuuki
Y
D000465:Algorithms; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D010783:Photometry / Q000295:instrumentation* / Q000379:methods; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D041623:Tomography, Optical Coherence / Q000295:instrumentation* / Q000379:methods