A Programmable Optical Filter With Arbitrary Transmittance for Fast Spectroscopic Imaging and Spectral Data Post-Processing

IEEE Access

Xiaoyu Cui¹  Liping Xie¹  Jiao Lu¹  Yuetian Ren¹  Shuo Chen¹  Yudong Yao¹  Jinhong Guo²  Wenbin Xu³ 

[1] College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China;School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, China;Science and Technology on Optical Radiation Laboratory, Beijing, China;

关键词: Digital micromirror device;    hyperspectral imaging;    programmable optical filter;    spectral reconstruction;   

DOI  :  10.1109/ACCESS.2019.2937095

来源: DOAJ

【 摘 要 】

Spectral reconstruction method based on narrow-band measurements has been demonstrated to achieve ultrafast spectroscopic imaging with high spatial and spectral resolution, in which multiple narrow-band images are collected by using several specific filters. Although commercially available filters can be employed in such method, filters with complex transmittance that are difficult to be fabricated typically show significant improvement in spectral reconstruction accuracy. In this study, a two dimensional programmable optical filter based on digital micromirror device (DMD) is proposed, in which its transmittance spectrum can be arbitrarily and quickly switched to realize complex transmittance. Furthermore, its flexible transmittance enables directly hardware-based spectral data post-processing, which can perform data acquisition and analysis simultaneously. Those have been evaluated by the diffuse reflectance spectra from normal and occluded skin flaps, as well as Raman spectra from live, apoptosis and necrosis leukemia cells. Our simulation results show that much higher spectral reconstruction accuracies can be achieved by the optimized filters with complex transmittance. Furthermore, the classification accuracy by using the proposed method is comparable to those achieved by conventional numerical methods. Therefore, based on the proposed programmable optical filter, fast spectroscopic imaging with high spatial and spectral resolution can be achieved for observing fast changing phenomena and even real-time target identification.

【 授权许可】

Unknown