Infrared and Laser Engineering, Volume. 52, Issue 10, 20230066(2023)
Optical system design of common-aperture multimode remote sensing camera
Figures & Tables(17)
Fig. 2. The surface shape of M2 and M3 free-form mirror after fitting. (a) Mirror M2; (b) Mirror M3
Fig. 12. Tolerance analysis of two freeform surfaces under 20 sets of samples. (a) MTF distribution of mirror M2 with
Table 1. Technical specification
View tableView in ArticleTable 1. Technical specification
Sequence number Technical index Visible-light imaging module Medium-wave-infrared imaging module Visible-light searching module 1 Wavelength/μm 0.45-0.9 3.7-4.8 0.45-0.9 2 Entrance pupil diameter/mm 800 800 130 3 Full field of view/(°) 0.4 0.4 10 （linear） 4 Effective focal length/mm 4200 4000 945 5 Ground resolution/m ≤0.45 ≤3.2 ≤8 6 MTF/lp·mm–1 ≥0.2@133 ≥0.2@20 ≥0.2@33
Table 2. Machining tolerance of components
View tableView in ArticleTable 2. Machining tolerance of components
Item Parameter Fringes ±1.0 Thickness/mm ±0.02 Surface tilt/(″) ±0.5 Surface decenter/mm ±0.02
Table 3. Assembly and adjustment tolerance of components
View tableView in ArticleTable 3. Assembly and adjustment tolerance of components
Item Parameter Interval/m ±0.02 Element tilt/(″) ±0.5 Eccentric element/mm ±0.02
Table 4. Tolerance analysis result of visible light image module
View tableView in ArticleTable 4. Tolerance analysis result of visible light image module
Title Result Traceable Monte Carlo generation number 1000 The name of the MTF value 0.367 The average MTF 0.285 MTF value of 98% lens >0.214 MTF value of 90% lens >0.240 MTF value of 80% lens >0.258 MTF value of 50% lens >0.288 MTF value of 20% lens >0.313 MTF value of 10% lens >0.323 MTF value of 2% lens >0.338
Table 5. Tolerance analysis results of medium wave
View tableView in ArticleTable 5. Tolerance analysis results of medium wave
Title Result Traceable Monte Carlo generation number 1000 The name of the MTF value 0.396 The average MTF 0.283 MTF value of 98% lens >0.201 MTF value of 90% lens >0.212 MTF value of 80% lens >0.245 MTF value of 50% lens >0.290 MTF value of 20% lens >0.341 MTF value of 10% lens >0.361 MTF value of 2% lens >0.385
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Liwei Peng, Minglei Zhang, Yu Chen, Lusong Jiang, Dapeng Dong. Optical system design of common-aperture multimode remote sensing camera[J]. Infrared and Laser Engineering, 2023, 52(10): 20230066
Paper Information
Category: Optical design
Received: Feb. 13, 2023
Accepted: --
Published Online: Nov. 21, 2023
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