Design and optimization of a spectrometer for high-resolution SD-OCT

• Main Authors: Wang, Lulu, Yu, Xiaojun, Ge, Xin, Wu, Xuan, Wang, Xianghong, Bo, En, Wang, Nanshuo, Liu, Xinyu, Ni, Guangming, Liu, Linbo
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Electrical and electronic engineering; Optical Coherence Tomography; Imaging Systems
• Online Access: https://hdl.handle.net/10356/143558
• Institution: Nanyang Technological University

We report the design of a high-efficiency spectrometer for high-resolution spectral-domain optical coherence tomography (SD-OCT). The advantages of the proposed spectrometer are two-fold: first, we use a concave mirror instead of a camera lens (as typically used) as the focusing optics to both improve the transmission efficiency and eliminate chromatic aberrations; second, the efficiency of the proposed spectrometer is approximately 1.23 times that of a refractive optics-based spectrometer for an SD-OCT system, with comparable ranging depth and axial resolution. Both theoretical analyses and imaging experiments were conducted to characterize and validate the performance of the proposed spectrometer.