Abstract—We have constructed the compact optical delay line for the axial scanning of time-domain optical coherence tomography. The delay line contains the retro-reflector, and the inclined reflection mirror, as well as the scanning mirror. This delay line is performed by the low-coherence reflectometer with a scanning speed of 400 Hz. The dimension of the delay line is 2 cm × 2 cm. We have achieved the scanning range of about 3 mm within the scanning mirror’s vibration angle of approximately 10°.

Index Terms—Imaging technique, interferometer, optical delay line, reflectometer.

Kitsakorn Locharoenrat is with the Physics Department, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand (e-mail: klkitsak@kmitl.ac.th).
I-Jen Hsu is with the Department of Physics, Chung Yuan Christian University, Chungli 32023, Taiwan ROC (e-mail: ijhsu@cycu.edu.tw).

Cite: Kitsakorn Locharoenrat and I-Jen Hsu, "Construction of the Optical Delay Line for the Optical Coherence Tomography," International Journal of Applied Physics and Mathematics  vol. 3, no. 2, pp. 137-139, 2013.