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实验室演示用于未来重力任务的离轴光学板设计

Bo Peng^1,2,3, Kailan Wu^2,4, Jingui Wu^2,4

¹Zhejiang Lab, Hangzhou 311121, China.

The Review of scientific instruments

|September 3, 2024

概括

一个新的离轴光学板设计增强了用于重力任务的卫星间激光测距干扰仪. 这种设计显著减少了位移和波浪前线传感噪声,为未来的高精度测量铺平了道路.

科学领域:

地质测量和地球观测
光学计量学在光学计量学
航空航天工程航空航天工程

背景情况:

卫星间激光测距干扰仪对于重力任务中的高精度测量至关重要.
现有的轴上设计和GRACE跟进任务的离轴设计为改进的光学板座配置提供了洞察力.

研究的目的:

开发和评估用于卫星间激光测距干扰仪的离轴光学板设计的初步面板.
整合以前的轴外和轴上光学板设计的优势.

主要方法:

构建一个初步的面板板,整合离轴光学板设计原则.
减少噪声和并行性错误的实验验证.

主要成果:

在10mHz时,光学基板之间的位移噪声减少到20nm/Hz.
在1kHz时,差异波面传感噪声被抑制到10−5rad/Hz.
倾向向长度合噪声限制在30μm/rad,相对平行度误差低于4.5%.

结论:

开发的离轴光学板设计显示了显著的降噪能力.
这种设计是中国未来重力任务的强有力的候选人,有望提高射程精度.

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