Acta Photonica Sinica, Volume. 54, Issue 2, 0254110(2025)
Optical Design and Stray Light Analysis for Integrated Asteroid Detection and Imaging
Figures & Tables(16)
Fig. 4. Modulation transfer function curves for different fields of view in the system
Fig. 8. Probability of MTF degradation in different directional fields of view
Table 1. Detector parameter details
View tableView in ArticleTable 1. Detector parameter details
Parameter Value Photon energy Ep/J 3.61×10-19 Non-suppressed stray radiation noise electron count Bn 4 Readout noise electron count Nr 15 Dark current noise electron count Nd 6 System transmittance τ0 70% Integration time t/s 0.042 Quantum efficiency QE 50%
Table 2. Final structural parameters of the system
View tableView in ArticleTable 2. Final structural parameters of the system
Surface Radius/mm Thickness/mm Quadratic coefficient Material Stop -818.53 -306.73 -1.093 6 MIRROR 1 -285.03 306.02 -4.179 4 MIRROR 2 100.68 18.96 0 SILICA_SPECIAL 3 395.21 14.27 0 4 -86.11 7.87 0 HQK3L_CDGM 5 113.28 20.00 0
Table 3. Allocation of tolerances
View tableView in ArticleTable 3. Allocation of tolerances
Type Value Lens thickness and air gap ±0.02 mm Lens surface tilt ±0.000 5 rad Lens surface decentering ±0.02 mm Lens local aperture 0.2 Lens aperture 2 Lens refractive index ±0.001 Abbe number of lens ±0.002 Conic constant （quadric） ±0.001 Curvature radius （quadric） ±0.02
Table 4. Distribution of surface roughness on optical surfaces and the resulting backscattered radiant flux
View tableView in ArticleTable 4. Distribution of surface roughness on optical surfaces and the resulting backscattered radiant flux
Optical surface number Roughness/nm Angle of incidence/（°） Half-aperture/mm Radiant flux/W Mirror 1 1.5 2.940 15 140 1.764 88×10-17 Mirror 2 1.5 3.768 03 38 7.612 6×10-17 Surface 1 of lens 1 2 1.005 32 15.5 4.301 3×10-17 Surface 2 of lens 1 2 1.535 91 14 5.272 39×10-17 Surface 1 of lens 2 2 2.606 89 12 8.111 84×10-17 Surface 2 of lens 2 2 0.911 53 12 8.111 84×10-17
Table 5. Structural parameters of the baffle
View tableView in ArticleTable 5. Structural parameters of the baffle
Parameters Outer baffle Primary mirror baffle Secondary mirror baffle Largest outer diameter/mm 319.81 84.02 120 Length/mm 475.58 144.75 91.09
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Liguo BIAN, Xuyang LI, Qinfang CHEN, Tongyu XU, Zhixian LU, Li ZHANG. Optical Design and Stray Light Analysis for Integrated Asteroid Detection and Imaging[J]. Acta Photonica Sinica, 2025, 54(2): 0254110
Paper Information
Category: Special Issue for Precise Beam Pointing for Space Gravitational Wave Detection
Received: Jul. 12, 2024
Accepted: Sep. 29, 2024
Published Online: Mar. 25, 2025
The Author Email: LI Xuyang (lixuyang2004@126.com)
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