基于通道光谱色散的拼接探测器平面检测方法研究

赵宏超; 张晓芊; 安其昌

doi:10.37188/CO.EN-2024-0026

基于通道光谱色散的拼接探测器平面检测方法研究

赵宏超^1,,
张晓芊^1, ,,
安其昌^2, ,

1.
中山大学·深圳先进制造学院, 广东深圳 518107
2.
中国科学院长春光学精密机械与物理研究所, 吉林长春 130033

详细信息

中图分类号: TH751
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出版历程
- 收稿日期: 2024-08-14
- 修回日期: 2024-09-23
- 录用日期: 2024-10-08
- 网络出版日期: 2024-10-22

Detection method of splicing detector based on channel spectral dispersion

doi: 10.37188/CO.EN-2024-0026

1.
School of Advanced Manufacturing, Shenzhen Campus of Sun Yat-sen University, No. 66, Gongchang Road, Guangming District, Shenzhen, Guangdong 518107, P.R. China
2.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P.R. China

Funds: Supported by National Key R & D Program of China (No. 2021YFC2202103); Jilin Science and Technology Development Program (No. 20220402032GH); Shenzhen Science and Technology Program (No. 20220818153519003).

More Information

Author Bio:
ZHAO Hongchao (1985—), PH.D, Associate Professor, School of Advanced Manufacturing, Shenzhen Campus of Sun Yat-sen University. His research interests are in precision optical systems and ultra -precision and ultra-stable structures. E-mail: zhaohongch@mail.sysu.edu.cn

ZHANG Xiaoqian (2004—), undergraduate, School of Advanced Manufacturing, Shenzhen Campus of Sun Yat-sen University. E-mail: zhangxq87@mail2.sysu.edu.cn

AN Qichang (1988—), PH.D, Associate Researcher. He received the B.E. degree from University of Science and Technology of China in 2011 and the Ph.D. degree from University of Chinese Academy of Sciences in 2018. His research interests include inspection and mounting of large-calibre optical systems. E-mail: anjj@mail.ustc.edu.cn

Corresponding author: zhangxq87@mail2.sysu.edu.cn; anjj@mail.ustc.edu.cn

摘要

摘要:
受探测器材料和技术的限制，大尺寸的探测器需要进行拼接和集成才能有效成像。对于拼接式大靶面探测器，拼接平整度直接决定了能量利用率和图像清晰度。同时，由于拼接探测器的调整范围有限，还需要对基准构建进行约束。针对上述问题，本文提出了一种基于通道光谱色散的新型探测器平整度检测方法。通过测量共面调整的干涉条纹，将调整后的残差控制在300 nm以内，验证了整个技术的可行性，并为下一代大口径天文巡天设备和大型目标探测器的发展提供了重要的技术支持。
- 大口径望远镜 /
- 拼接探测器表面 /
- 波前检测 /
- 通道光谱色散
Abstract:
For segmented detectors, surface flatness is critical as it directly influences both energy resolution and image clarity. Additionally, the limited adjustment range of the segmented detectors necessitates precise benchmark construction. This paper proposes an architecture for detecting detector flatness based on optical fiber interconnection. By measuring the dispersion fringes for coplanar adjustment, the final adjustment residual is improved to better than 300 nm. This result validates the feasibility of the proposed technology and provides significant technical support for the development of next-generation large-aperture sky survey equipment.
- Large aperture telescope /
- Segmented detector surface /
- Wavefront detection /
- Channel spectral dispersion

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Figure 1. Large-range high-precision step difference calculation based on channel spectrum.

下载: 全尺寸图片幻灯片

Figure 2. Surface shape reconstruction of segmented detectors based on slope gradients. (a) Reconstruct surface figure. (b) Accuracy comparison of cross-section reconstruction. (c) Structure function comparison.

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Figure 3. Multi-stage surface figure reconstruction analysis based on simulation. (a) Sampling figure in low-resolution reconstruction process. (b) Original surface figure in low-resolution reconstruction process. (c) Reconstructed surface figure by low-resolution reconstruction. (d) Sampling figure in low-resolution reconstruction process. (e) Original surface figure in low-resolution reconstruction process. (f) Reconstructed surface figure by low-resolution reconstruction. (g) Sampling figure in high-resolution reconstruction process. (h) Original surface figure in high-resolution reconstruction process. (i) Reconstructed surface figure by high-resolution reconstruction.

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Figure 4. Detector architecture based on channel spectroscopy.

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Figure 5. Photo of high-throughput segmented detectors measurement site.

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Figure 6. Under interconnect architecture of optical fibre, original dispersive fringes and differential in two directions. (a) original, (b) differential direction 1, and (c) differential direction 2.

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Figure 7. Under interconnect architecture of optical fibre, original dispersive stripes and frequency domain signals in two directions. (a). original, (b) differential direction 1, and (c) differential direction 2.

下载: 全尺寸图片幻灯片

Figure 8. Frequency transformation under high-throughput testing with different step differences.

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Table 1. Examples of spliced detectors in terms of foundations

Detectors	Number of detectors	Resolution ＂/pixel	Aperture /m	Gap/μm	Accuracy /μm	Organization
VST	32 CCDs	0.21	2.6	500	30	ESO
"Mozi" survey telescope	9 (10 K × 10 K) CCDs	0.12	2.5	/	25	University of Science and Technology of China
LSST	189 (4K×4K) CCDs	0.20	8.4	200	10	SLAC National Accelerator Laboratory
Blanco telescope	62 CCDs	0.263	8.4	200	15	Cerro Tololo Inter-American Observatory (CTIO)
Pan-STARRS	60 CCDs	0.258	1.8	/	10	University of Hawaii (UH)
Gaia survey telescope	106 CCDs	0.18	1.5×2	500	20	The European Space Agency (ESA)

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