Zhizhong Zheng, Zhong Yang, Liancun Xiu. Development and Application of Shortwave Infrared Convex Blazed Grating with High Diffraction Efficiency[J]. Acta Optica Sinica, 2020, 40(12): 1205002
- Acta Optica Sinica
- Vol. 40, Issue 12, 1205002 (2020)
Fig. 1. Diagram of Offner imaging spectrometer
Fig. 2. Schematic of blazed grating
Fig. 3. Structure of Lamina groove grating
Fig. 4. Simulation curves of diffraction efficiency of rectangular groove convex grating. (a) Under different groove depths; (b) under different wavelengths
Fig. 5. Simulation curves of diffraction efficiency of triangular groove convex grating. (a) Under different angles; (b) under different wavelengths
Fig. 6. Process diagram of convex grating
Fig. 7. Deviation curves along Y-axis of machine under different conditions. (a) Under effect of wavefront; (b) under effect of ghost line; (c) standard deviation under effect of stray light
Fig. 8. Influence of residual fillet of diamond grave on diffraction efficiency of grating. (a) residual fillet diagram; (b) diffraction efficiency of grating with different residual fillet
Fig. 9. Real picture of developed convex grating
Fig. 10. Topography of zero-order optical wavefront of convex grating
Fig. 11. Profile of convex grating surface. (a) Surface profile of convex grating; (b) profile of convex grating
Fig. 12. Diagram of grating diffraction efficiency testing device
Fig. 13. Diffraction efficiency curve of convex blazed grating
Fig. 14. Proposed system. (a) Structure of imaging spectrometer; (b) SWIR imaging spectrometer; (c) small airborne hyperspectral system
Fig. 15. Hyperspectral data and SNR ratio curve obtained from flight experiment. (a) Hyperspectral image cube; (b) radiance spectral curve of typical ground objects; (c) SNR curve
|
Table 1. Specifications of imaging spectrometer
|
Table 2. Parameters of convex grating
|
Table 3. Diffraction efficiency of gratings with different groove types%
|
Table 4. Data list of groove spacing
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20