Dongmei Liu, Pengfei Yue, Xiuhua Fu, Jing Zhang, HongYu Cao, Shuang Li. Development of Iris Recognition Filter with Low-Angle Effect[J]. Acta Optica Sinica, 2019, 39(11): 1131002
- Acta Optica Sinica
- Vol. 39, Issue 11, 1131002 (2019)
Fig. 1. Optical constants of Si-H materials under different H2 gas flows. (a) Refractive index; (b) extinction coefficient
Fig. 2. Optical constants of Si-H materials. (a) Refractive index; (b) extinction coefficient
Fig. 3. Optical constants of Si3N4 materials. (a) Refractive index; (b) extinction coefficient
Fig. 4. Optical constants of SiO2 materials. (a) Refractive index; (b) extinction coefficient
Fig. 5. Front surface theoretical spectral curve
Fig. 6. Back surface theoretical spectral curve
Fig. 7. Double-sided transmission theoretical spectral curve
Fig. 8. Front surface spectral test curve
Fig. 9. Back surface spectral test curve
Fig. 10. Spectral test curve of sample 1 after boiling for 0.5 h
Fig. 11. Spectral test curve of sample 1 after adjusting the process and boiling for 0.5 h
Fig. 12. Comparison of design curve and actual test curve
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Table 1. Designed spectral parameters of filter
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Table 2. Optical constants of Si-H at 950 nm under different H2 gas flows
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Table 3. Optical constants of materials used in design
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Table 4. Process parameters
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