{"title":"Quantitative analysis of backscattering contamination sources in the TianQin telescope.","authors":"Xinxin Liu, Zizheng Li, Yiping Wang, Tianxiang Lv, Jingxiao Peng, Shanxiang Liang, Xin Zhang","doi":"10.1364/OE.570389","DOIUrl":null,"url":null,"abstract":"<p><p>The utilization of smooth optical surfaces represents a critical approach for suppressing backscattering in spaceborne gravitational wave telescopes, such as those employed in the TianQin project. The bidirectional reflectance distribution function (BRDF) serves as an effective physical parameter for characterizing light scattering properties and has been extensively applied in stray light suppression research. This study employs surface scattering theory to quantitatively analyze the impact of three major stray light sources - surface roughness, defects, and contamination-on telescope system backscattering. Based on this analysis, we establish specific performance requirements for single mirror surface roughness, defect tolerance, and cleanliness levels.</p>","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37629-37640"},"PeriodicalIF":3.3000,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics express","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OE.570389","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
The utilization of smooth optical surfaces represents a critical approach for suppressing backscattering in spaceborne gravitational wave telescopes, such as those employed in the TianQin project. The bidirectional reflectance distribution function (BRDF) serves as an effective physical parameter for characterizing light scattering properties and has been extensively applied in stray light suppression research. This study employs surface scattering theory to quantitatively analyze the impact of three major stray light sources - surface roughness, defects, and contamination-on telescope system backscattering. Based on this analysis, we establish specific performance requirements for single mirror surface roughness, defect tolerance, and cleanliness levels.
期刊介绍：
Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.
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