Silin ZHAO, Quanquan MU, Dayu LI. A large field of view infrared staring imaging system based on liquid crystal grating[J]. Optics and Precision Engineering, 2024, 32(12): 1824
- Optics and Precision Engineering
- Vol. 32, Issue 12, 1824 (2024)
Fig. 1. Structure of the MWIR staring imaging system
Fig. 2. Telecentric beam path in image space
Fig. 3. MTF of each sub FOV unit
Fig. 4. Field lens array
Fig. 5. Figures of system vignetting
Fig. 6. Polarization independent LC shutter array
Fig. 7. Schematic diagram of liquid crystal devices in a liquid crystal shutter array
Fig. 8. Zemax simulation of a large FOV infrared staring imaging system based on liquid crystal grating， where different colors represent the light in different sub apertures
Fig. 9. Actual aperture light transmission diagram of the first surface of the rear lens group
Fig. 10. Rear lens group structure
Fig. 11. MTF of each FOV unit
Fig. 12. Distortion figures of each FOV unit
Fig. 13. Reverse tracing of Narcissus
Fig. 14. Tilted LC shutter array
Fig. 15. Reverse tracking after tilting the LC shutter array
Fig. 16. MTF of the center and left aperture tilting
Fig. 17. Image of NITD distribution on infrared detectors
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Table 1. Design parameters of front lens group
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Table 2. Design parameters of relay lens group
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Table 3. Design parameters of LCPG
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Table 4. YNI and I/IBAR of each lens
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Table 5. Relatively severe tolerance items in the system
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