Compact Shortwave Infrared Imaging Spectrometer Based on a Catadioptric Prism
Abstract
:1. Introduction
2. Mathematical Model
2.1. Aberration Theory of Catadioptric Prism
2.2. Spectrometer Model
3. Optomechanical System Design
3.1. Initial Spectrometer Calculations
3.2. Optimization of the Entire System
3.3. Tolerance Analysis
3.4. Prototype Fabrication and Assembly
4. Prototype Performance Tests
4.1. Spatial Performance Optical Tests
4.2. Spectral Performance Optical Tests
4.3. External Imaging Tests
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Parameter | Value | Units |
---|---|---|
spectrum | 950–2500 | nm |
F number | 3 | - |
field-of-view | 16 | degree |
angle resolution | 0.27 | mrad |
pixel size | 24 × 32 | μm |
spectral band | 132 | - |
Tolerance Item | Element | Given Value | Change in MTF |
---|---|---|---|
Surface tilt | Prism 2 | −0.03–0.03 | 0.055 |
Element decenter (mm) | Prism 3 | −0.03–0.03 | 0.048 |
Surface tilt (°) | Prism 1 | −0.03–0.03 | 0.04 |
Element tilt (°) | Mirror 1 | −0.03–0.03 | 0.035 |
Surface decenter (mm) | Lens 2 (telescope) | −0.04–0.04 | 0.032 |
Element decenter (mm) | Lens 1 (telescope) | −0.04–0.04 | 0.026 |
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Feng, L.; He, X.; Li, Y.; Wei, L.; Nie, Y.; Jing, J.; Zhou, J. Compact Shortwave Infrared Imaging Spectrometer Based on a Catadioptric Prism. Sensors 2022, 22, 4611. https://doi.org/10.3390/s22124611
Feng L, He X, Li Y, Wei L, Nie Y, Jing J, Zhou J. Compact Shortwave Infrared Imaging Spectrometer Based on a Catadioptric Prism. Sensors. 2022; 22(12):4611. https://doi.org/10.3390/s22124611
Chicago/Turabian StyleFeng, Lei, Xiaoying He, Yacan Li, Lidong Wei, Yunfeng Nie, Juanjuan Jing, and Jinsong Zhou. 2022. "Compact Shortwave Infrared Imaging Spectrometer Based on a Catadioptric Prism" Sensors 22, no. 12: 4611. https://doi.org/10.3390/s22124611
APA StyleFeng, L., He, X., Li, Y., Wei, L., Nie, Y., Jing, J., & Zhou, J. (2022). Compact Shortwave Infrared Imaging Spectrometer Based on a Catadioptric Prism. Sensors, 22(12), 4611. https://doi.org/10.3390/s22124611