Acta Photonica Sinica, Volume. 53, Issue 1, 0122002(2024)
Optical Design of High-compression Ratio and Low-wavefront Error Gravitational Wave Detection Telescope
Figures & Tables(13)
Fig. 3. The backscattered light energy with different deflection angle of quaternary mirror
Fig. 7. The backscattered light energy distribution diagram of the principle system
Table 1. Key technical specifications of telescope
View tableView in ArticleTable 1. Key technical specifications of telescope
Parameter Specification Wavelength/nm 1 064 Entrance pupil diameter/mm 300 Afocal magnification 100× Acquisition field/µrad ±200 Far-field wavefront quality λ/40@1 064 nm Scattered light power 10-10 of laser power
Table 2. Design parameters of optical system（the aperture of 300 mm）
View tableView in ArticleTable 2. Design parameters of optical system（the aperture of 300 mm）
Surface Radius/mm Thickness/mm Conic Tilt/（°） PM -1 255.843 -600 -1 — SM -62.827 690 -1.187 — TM — -120 — 5.5 QM 333.946 200 — 5.679
Table 3. Stray light path analysis of the principle system
View tableView in ArticleTable 3. Stray light path analysis of the principle system
Ray paths Path No. rays Absorbed flux Percentage of total 1 Emitted→QM→TM（scatter）→QM→detector 199 5.0334088×10-10 52.36 2 Emitted→QM（scatter）→detector 144 3.6789633×10-10 38.27 3 Emitted→QM→TM→SM（scatter）→TM→QM→detector 36 9.0148520×10-11 9.38
Table 4. The surface figure of principle system
View tableView in ArticleTable 4. The surface figure of principle system
Surface Surface figure error/RMS（λ=632.8 nm） PM ≤λ/90 SM ≤λ/90 TM ≤λ/110 QM ≤λ/110
Table 5. Tolerance setting in sensitivity analysis of the principle system
View tableView in ArticleTable 5. Tolerance setting in sensitivity analysis of the principle system
Surface Tolerances Radius Thickness Decenter X Decenter Y Tilt X Tilt Y PM ±5 μm ±20 μm ±1 μm ±1 μm ±1.8″ ±1.8″ SM ±5 μm ±20 μm ±1 μm ±1 μm ±3.6″ ±3.6″ TM — ±20 μm ±10 μm ±10 μm ±36″ ±36″ QM ±10 μm ±20 μm ±10 μm ±10 μm ±36″ ±36″
Table 6. Cumulative probability of wavefront error RMS
View tableView in ArticleTable 6. Cumulative probability of wavefront error RMS
Probability 98% 90% 80% 50% 20% 10% 2% WFE RMS 0.027 0.021 0.017 5 0.012 2 0.007 6 0.006 1 0.004 3
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Rong LIANG, Xiaojun ZHOU, Chunbo ZOU, Huangrong XU, Chenxi LI, Tao YU, Weixing YU. Optical Design of High-compression Ratio and Low-wavefront Error Gravitational Wave Detection Telescope[J]. Acta Photonica Sinica, 2024, 53(1): 0122002
Paper Information
Category: Optical Design and Fabrication
Received: Jul. 19, 2023
Accepted: Aug. 23, 2023
Published Online: Feb. 1, 2024
The Author Email: Weixing YU (yuwx@opt.ac.cn)
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