Chinese Journal of Liquid Crystals and Displays, Volume. 38, Issue 2, 188(2023)
Optimal design of Lyot liquid crystal tunable filter based on the artificial immune algorithm
Fig. 1. Flow chart of LCTF optimization based on artificial immune algorithm
Fig. 2. Comparison of filtering performance under different passband and stopband（w1∶w2）weights.（a）FWHM comparison；（b）Side-lobe suppression（SLS）comparison.
Fig. 3. Comparison of evaluation function values under different passband and stoppand weights
Fig. 4. Comparison of spectral curves of traditional Lyot type before and after optimization by IA algorithm
Fig. 5. Comparison of spectral response curves between dual population filter（2.71，6.35，14.92，23.60，27.49 μm）designed by IA algorithm and tranitional Lyot type LCTF（2，4，8，16，32 μm）.
Fig. 6. Comparison of transmission gain curve between traditional Lyot type LCTF and LCTF design by IA algorithm
Fig. 8. Comparison of the overall spectral response curves between the actual LCTF designed by IA algorithm and the traditional Lyot LCTF
Fig. 9. Comparison of the evaluation function values under the actual LCTF designed by the IA algorithm and the traditional Lyot type LCTF
Table 1. Static characterization parameters of Lyot type LCTF
View tableView in ArticleTable 1. Static characterization parameters of Lyot type LCTF
静态参数 定义 表征的滤波性能 半高宽 峰值高度一半时的透射峰宽度 光谱分辨率 自由光谱范围 相邻级次的不同透射峰之间的光谱距离 光谱调谐范围 旁瓣抑制 除主峰外的杂峰抑制 光谱纯度
Table 2. Dynamic characterization parameters of Lyot type LCTF
View tableView in ArticleTable 2. Dynamic characterization parameters of Lyot type LCTF
动态参数 定义 表征的滤波性能 调谐波长最小移动量（dλmin） 最小波长调节量 波长调谐步进 调谐波长精度（Δλ） 实际与理论滤波中心波长的差值 波长调谐精确性 调谐波长重复性（δλ） 重复调谐同一中心波长中的测量最大值与最小值之差 波长调谐稳定性
Table 3. Comparison of filtering performance parameters under different passband and stopband weight ratios
View tableView in ArticleTable 3. Comparison of filtering performance parameters under different passband and stopband weight ratios
w2/w1 FWHM/nm PSLR PSLL/dB MSLL/dB MSE 1 8.6 0.0484 -13.50 -46.74 0.350 0 10 8.6 0.0464 -14.75 -43.95 0.342 7 20 9.0 0.0338 -14.89 -46.28 0.333 6 25 7.6 0.0172 -17.74 -47.85 0.322 5 30 9.6 0.0361 -11.88 -44.91 0.338 6 50 8.0 0.0451 -14.89 -42.91 0.349 9 100 8.8 0.0604 -17.51 -44.89 0.360 5
Table 4. Comparison between traditional Lyot type filter and the five-stage filter with arbitrary thickness designed by IA algorithm
View tableView in ArticleTable 4. Comparison between traditional Lyot type filter and the five-stage filter with arbitrary thickness designed by IA algorithm
滤波性能参数 传统LCTF IA算法设计LCTF FWHM/nm 14.0 13.0 T 1.000 0.996 PSLR 0.047 4 0.012 6 PSLL/dB -13，23 -23.14 MSL/dB -28.79 -48.96 MSE 0.395 8 0.340 8
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Li-xin CHEN, Ru-xin ZHOU, Wen-zheng SU, Wen-bin ZHENG, Ying YANG, Wen-wen MENG, Shi-yuan ZHANG, Xiang-sheng XIE, Li-shuang YAO. Optimal design of Lyot liquid crystal tunable filter based on the artificial immune algorithm[J]. Chinese Journal of Liquid Crystals and Displays, 2023, 38(2): 188
Category: Research Articles
Received: Oct. 12, 2022
Accepted: --
Published Online: Feb. 20, 2023
The Author Email: Li-shuang YAO (lsyao@stu.edu.cn)
