Topological Optimization Design of Imaging Primary Mirror Based on Root-Mean-Square Error of Surface Figures

Fig. 6. Topologically optimized structure obtained from OptiStruct software when the density threshold is 0.20.(a) Front view;(b) section (no column); (c) section (with column); (d) isometric

Download full size

Fig. 7. Refactoring model. (a) Front view; (b) section (no column); (c) section (with column); (d) isometric

Download full size

Fig. 8. Stress distribution of reconstructed model

Download full size

Table 1. Material parameters of imaging primary mirror
View table
Table 1. Material parameters of imaging primary mirror
Parameter Material Elastic modulus /MPa Poisson's ratio Density /（g·cm^-3）
Value 6061 aluminium alloy 71000 0.31 2.7

Table 2. DRESP1 commands
View table
Table 2. DRESP1 commands
No. Command
1 ID number
2 Response name
3 Response ID
4 Direction
5 Node number

Table 3. Comparison of the results of different density thresholds

View table

Table 3. Comparison of the results of different density thresholds

Density threshold	0.10	0.15	0.20	0.25	0.30	0.35	0.40	0
RMS1 /μm	0.3153	0.3191	0.3239	0.3279	0.3314	0.3367	0.3407	0.5754
RMS2 /μm	0.2885	0.2888	0.2862	0.2883	0.2907	0.2907	0.2900	0.5392
Mass /g	671.62	662.84	651.95	643.74	636.52	631.63	625.47	1054.6

Table 4. Comparison of reconstructed model performance
View table
Table 4. Comparison of reconstructed model performance
Model Solid model Refactoring model
RMS1 /μm 0.5754 0.327
RMS2 /μm 0.5392 0.291
Mass /g 1054.6 648.21

Table 5. Comparison of root-mean-square error of mirror surface figures after optical fabrication
View table
Table 5. Comparison of root-mean-square error of mirror surface figures after optical fabrication
Face type Theoretical face Actual face
RMS1 /μm 7253 7253.36
RMS2 /μm 8525 8525.31

Tools

Get Citation

Copy Citation Text

Ke Chen, Rongsheng Qiu. Topological Optimization Design of Imaging Primary Mirror Based on Root-Mean-Square Error of Surface Figures[J]. Acta Optica Sinica, 2022, 42(20): 2012003

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites