Infrared and Laser Engineering, Volume. 51, Issue 6, 20210463(2022)
Research on splicing integrated filter technology of short/medium infrared long line array
Figures & Tables(10)
Fig. 1. Structure diagram of 4-channel short/medim infrared LLASIF
Fig. 2. Transmission spectrum design curve of 1.55-1.75 μm narrowband filter
Fig. 3. Transmission spectrum design curve of 2.08-2.35 μm narrowband filter
Fig. 4. Transmission spectrum design curve of 3.5-3.9 μm narrowband filter
Fig. 5. Transmission spectrum design curve of 4.85-5.05 μm narrowband filter
Table 1. Spectral performance requirements of narrow band filter at low temperature
View tableView in ArticleTable 1. Spectral performance requirements of narrow band filter at low temperature
SW1 SW2 MW1 MW2 注：Tp为通带最大透射率。 Bandpass 1.55±0.03 μm~ 1.75±0.03 μm 2.08±0.03 μm~ 2.35±0.03 μm 3.5±0.03 μm~ 3.9±0.03 μm 4.85±0.03 μm~ 5.05±0.03 μm Bandwidth ≥0.2 μm ≥0.27 μm ≥0.4 μm ≥0.2 μm Average transmittance ≥80% ≥80% ≥75% ≥75% Rejectness ≤0.5% ≤0.5% ≤0.5% ≤0.5% steepness 2.5% 2.5% 2.5% 2.5% Coefficient of ripple 0.1 Tp 0.1 Tp 0.1 Tp 0.1 Tp
Table 2. Test results of 4-channel short/medim infrared LLASIF
View tableView in ArticleTable 2. Test results of 4-channel short/medim infrared LLASIF
SW1 SW2 MW1 MW2 Bandpass 1.54-1.78 µm 2.07-2.36 µm 3.48-3.93 µm 4.82-5.05 µm Bandwidth 0.24 μm 0.29 µm 0.45 µm 0.23 µm Average transmittance 90.3% 94.0% 90.0% 90.5% Rejectness 0.3% 0.2% 0.3% 0.4% Steepness 2.4% 2.2% 2.5% 2.3% Coefficient of ripple 0.08 Tp 0.03Tp 0.08 Tp 0.04 Tp Minimum seam width 10 μm Seam parallelism error 1 μm
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Runfu Wang, Duoshu Wang, Dong Fan, Chen Li, Jizhou Wang, Maojin Dong. Research on splicing integrated filter technology of short/medium infrared long line array[J]. Infrared and Laser Engineering, 2022, 51(6): 20210463
Paper Information
Category: Infrared technology and application
Received: Aug. 15, 2021
Accepted: --
Published Online: Dec. 20, 2022
The Author Email: Wang Duoshu (wang_d_s@163.com)
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