Acta Photonica Sinica, Volume. 49, Issue 6, 0611002(2020)
Optical Path Design for Catadioptric Star Sensor with Large Aperture
Figures & Tables(14)
Fig. 5. The lateral aberration curve of the optical system of star sensor
Table 1. Specifications of the star sensor optical system
View tableView in ArticleTable 1. Specifications of the star sensor optical system
Parameter Value Focal length 425 mm Entrance diameter 250 mm Half field of view(diagonal) 1.4° Spectral range 450~950 nm Primary wavelength 600 nm Pixel size of CCD detector 15 μm ×15 μm Displacement of centroid ＜0.43 μm Relative distortion ＜0.1% Lateral color ＜2 μm Modulation transfer function ≥0.5@34 lp/mm Spotradius encircled 80% energy ＜15 μm
Table 2. Optical lens parameters
View tableView in ArticleTable 2. Optical lens parameters
Lens Radius of curvature r ij/mmLens thickness T /mmDiameter d /mmAir thickness L /mmGlass C1 791.965 －4 921.341 37.000 285.3 65.0 SILICA C2 －659.988 －10 500 28.000 269.3 189.0 SILICA M1 －849.753 －849.753 15.875 257.2 －189.0 Mirror M2 －10 500 －10 500 8.750 132.9 178.0 Mirror C3 －146.253 107.419 7.000 49.5 1.9 H-LAF2 C4 107.982 －132.483 17.500 48.4 0.6 H-LAK10 C5 138.007 722.838 22.000 45.3 28.0 H-LAK10
Table 3. Comparison between the performance indexes of star sensors at home and abroad and the proposed design indexes
View tableView in ArticleTable 3. Comparison between the performance indexes of star sensors at home and abroad and the proposed design indexes
Country Index Detectable stellar magnitude/Mv Quality/kg Germany ASTRO5 6 1.5 U.S.A HD 1003S 6 3.2 U.K. altair-HB 7.5 1.8 China Beijing observatory 6.5 4 China This system 15 1.45
Table 4. Diameter and energy center deviation of the diffuse spot in different field of view
View tableView in ArticleTable 4. Diameter and energy center deviation of the diffuse spot in different field of view
Field/(°) Spot diameter /μm Displacement of centroid /μm 0.0 8.054 0.000 0.7 9.964 0.039 1.0 11.75 0.027 1.2 13.258 0.009 1.4 15.03 0.001
Table 5. Lateral color value
View tableView in ArticleTable 5. Lateral color value
Field /(°) Short-long wave/μm Short-primary wave/μm Long-primary wave/μm 0 0 0 0 0.7 －0.741 0.514 －0.228 1 －1.1 0.756 －0.342 1.2 －1.38 0.946 －0.435 1.4 －1.67 1.138 －0.532
Table 6. 20 Monte Carlo statistical analysis results
View tableView in ArticleTable 6. 20 Monte Carlo statistical analysis results
Parameter Value Percentage of Monte Carlo/% 90 80 50 20 10 Structural number 18 16 10 4 2 RMS spot radius/μm 7.509 63 7.303 33 6.310 13 5.389 58 5.136 95
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Jian-lin LI, Guang-zhi LEI, Yang BAI, Yan WEN, Shang-min LIN. Optical Path Design for Catadioptric Star Sensor with Large Aperture[J]. Acta Photonica Sinica, 2020, 49(6): 0611002
Paper Information
Category: Imaging Systems
Received: Jan. 9, 2020
Accepted: Mar. 27, 2020
Published Online: Nov. 26, 2020
The Author Email: LEI Guang-zhi (13022861093@163.com)
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