Qingsheng XUE, Haoxuan BAI, Fengqin LU, Jingyao YANG, Hui LI. Development of Snapshot Hyperspectral Imager Based on Microlens Array[J]. Acta Photonica Sinica, 2023, 52(5): 0552223
- Acta Photonica Sinica
- Vol. 52, Issue 5, 0552223 (2023)
Fig. 1. The structure and principle of the snapshot spectral imager based on microlens array
Fig. 2. Schematic diagram of geometrical optical principle of microlens imaging on the image plane of objective lens
Fig. 3. 2D structure of the objective lens
Fig. 4. The spot diagram of the objective lens
Fig. 5. The MTF curve of the objective lens
Fig. 6. The distortion of the objective lens
Fig. 7. The structure and imaging statue of the objective lens and microlens
Fig. 8. The image before and after the microlens array
Fig. 9. The 2D structure of the double amici prism and imaging spectrometer
Fig. 10. The MTF curve of the imaging spectrometer at different wavelengths
Fig. 11. The footprint of the imaging spectrometer
Fig. 12. The overlap of the spectrum generated by different microlens
Fig. 13. Simulation result of the whole system
Fig. 14. The key components of the whole system
Fig. 15. The structure of the snapshot hyperspectral imager based on microlens array
Fig. 16. The image composed of the data obtained by the system
Fig. 17. The pre-processing result of the data and determined center of microlens
Fig. 18. The calibration data and result
Fig. 19. Spectrum of mercury lamp and its gauss fit result
Fig. 20. The object used to measure spatial resolution and the image obtained by the system
Fig. 21. The true object and the origin data obtained by the system
Fig. 22. Monochromatic images of different spectral channels
Fig. 23. The spectrum and reflectance obtained by the system
Fig. 24. Comparison of the reflectance obtained by the commercial spectrometer and established system
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Table 1. Parameters and values of the detector，microlens array and the objective lens
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Table 2. Design result of the objective lens
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Table 3. Design result of the collimating lens and imaging lens
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Table 4. Spectral resolution calculating result of the system
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