中国物理B ›› 2018, Vol. 27 ›› Issue (8): 80702-080702.doi: 10.1088/1674-1056/27/8/080702
• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇 下一篇
Calibration and data restoration of light field modulated imaging spectrometer
Li-Juan Su(苏丽娟), Qiang-Qiang Yan(严强强), Yan Yuan(袁艳), Shi-Feng Wang(王世丰), Yu-Jian Liu(刘宇健)
- 1 Key Laboratory of Precision Opto-mechatronics Technology of Ministry of Education, Beihang University, Beijing 100191, China;
2 Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China
Calibration and data restoration of light field modulated imaging spectrometer
Li-Juan Su(苏丽娟)1, Qiang-Qiang Yan(严强强)1,2, Yan Yuan(袁艳)1, Shi-Feng Wang(王世丰)1, Yu-Jian Liu(刘宇健)1
- 1 Key Laboratory of Precision Opto-mechatronics Technology of Ministry of Education, Beihang University, Beijing 100191, China;
2 Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China
摘要：
A light field modulated imaging spectrometer (LFMIS) can acquire the spatial-spectral datacube of targets of interest or a scene in a single shot. The spectral information of a point target is imaged on the pixels covered by a microlens. The pixels receive spectral information from different spectral filters to the diffraction and misalignments of the optical components. In this paper, we present a linear spectral multiplexing model of the acquired target spectrum. A calibration method is proposed for calibrating the center wavelengths and bandwidths of channels of an LFMIS system based on the liner-variable filter (LVF) and for determining the spectral multiplexing matrix. In order to improve the accuracy of the restored spectral data, we introduce a reconstruction algorithm based on the total least square (TLS) approach. Simulation and experimental results confirm the performance of the spectrum reconstruction algorithm and validate the feasibility of the proposed calibrating scheme.
中图分类号: (Visible and ultraviolet spectrometers)
- 07.60.Rd