Yushi Zhao, Wenjun He, Zhiying Liu, Yuegang Fu. Development of convex blazed grating in coded aperture spectral imager[J]. Infrared and Laser Engineering, 2022, 51(3): 20220007
- Infrared and Laser Engineering
- Vol. 51, Issue 3, 20220007 (2022)
Fig. 1. Optical path diagram of Offner coded aperture spectral imaging system
Fig. 2. Flow diagram of the design method for a convex blazed grating
Fig. 3. Optical design schematic of the dual-pass Offner spectroscopic system
Fig. 4. Information of the rays on the convex blazed grating
Fig. 5. Statistical histogram of incident angle, azimuth angle and polarization angle
Fig. 6. Iterative process of PSO optimization algoritm
Fig. 7. Fabrication of the convex blazed grating
Fig. 8. Test result of groove fabrication error of the convex blazed grating
Fig. 9. Topography of zero-order optical wavefront of the convex blazed grating
Fig. 10. Diffraction efficiency test of the convex blazed grating
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Table 1. Specifications of coded aperture spectral imager
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Table 2. Specifications of the dual-pass Offner spectroscopic sytem
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Table 3. Design result of the dual-pass Offner spectroscopic sysytem
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Table 4. Initial Parameters of the PSO optimization algorithm
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