Research on splicing integrated filter technology of short/medium infrared long line array

Runfu Wang; Duoshu Wang; Dong Fan; Chen Li; Jizhou Wang; Maojin Dong

doi:10.3788/IRLA20210463

Journals >Infrared and Laser Engineering >Volume 51 >Issue 6 >Page 20210463 > Article

Infrared and Laser Engineering
Vol. 51, Issue 6, 20210463 (2022)

Research on splicing integrated filter technology of short/medium infrared long line array

Runfu Wang¹, Duoshu Wang^2、*, Dong Fan³, Chen Li³, Jizhou Wang³, and Maojin Dong³

Author Affiliations

¹Science and Technology on Material Performance Evaluating in Space Environment Laboratory, Lanzhou Institute of Physics, Lanzhou 730000, China

²Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics, Lanzhou 730000, China

³Lanzhou Institute of Physics, Lanzhou 730000, China

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DOI: 10.3788/IRLA20210463 Cite this Article

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 Copy Citation Text

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Fig. 1. Structure diagram of 4-channel short/medim infrared LLASIF

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Fig. 2. Transmission spectrum design curve of 1.55-1.75 μm narrowband filter

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Fig. 3. Transmission spectrum design curve of 2.08-2.35 μm narrowband filter

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Fig. 4. Transmission spectrum design curve of 3.5-3.9 μm narrowband filter

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Fig. 5. Transmission spectrum design curve of 4.85-5.05 μm narrowband filter

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Fig. 6. Gluing and bonding tools

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Fig. 7. Transmission spectrum test curves of narrowband filters

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Fig. 8. Picture of 4-channel short/medim infrared LLASIF

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	SW1	SW2	MW1	MW2
注：T_p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 T_p	0.1 T_p	0.1 T_p	0.1 T_p

Table 1. Spectral performance requirements of narrow band filter at low temperature

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	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 T_p	0.03T_p	0.08 T_p	0.04 T_p
Minimum seam width	10 μm
Seam parallelism error	1 μm

Table 2. Test results of 4-channel short/medim infrared LLASIF

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