{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T02:53:30Z","timestamp":1787021610484,"version":"build-2736575974"},"reference-count":15,"publisher":"Optica Publishing Group","issue":"33","license":[{"start":{"date-parts":[[2025,11,14]],"date-time":"2025-11-14T00:00:00Z","timestamp":1763078400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2025,11,14]],"date-time":"2025-11-14T00:00:00Z","timestamp":1763078400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of\n\t\t\t\t\t\tChina","doi-asserted-by":"publisher","award":["52275083"],"award-info":[{"award-number":["52275083"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Appl. Opt."],"published-print":{"date-parts":[[2025,11,20]]},"abstract":"<jats:p>\n                    This paper investigates the\n\t\t\t\t\tthermal drift of the\n\t\t\t\t\tline-of-sight (LOS) resulting from\n\t\t\t\t\ttemperature fluctuations\n\t\t\t\t\tduring the on-orbit operation of a large-aperture, long-focal-length\n\t\t\t\t\toff-axis reflective star tracker. It aims to develop optimization\n\t\t\t\t\tstrategies to improve thermal stability and LOS accuracy. A tolerance\n\t\t\t\t\tanalysis of the optical system was first performed to quantify the\n\t\t\t\t\timpact of each optical component on LOS variation, with a specific\n\t\t\t\t\tfocus on the primary, secondary, and tertiary mirrors. Subsequently,\n\t\t\t\t\tan LOS sensitivity matrix was constructed to correlate structural\n\t\t\t\t\tdisplacements with optical image point deviations. Based on this, the\n\t\t\t\t\tflexible support structures of the mirrors were sequentially\n\t\t\t\t\toptimized, resulting in a configuration that effectively reduces\n\t\t\t\t\tthermal drift. The results indicate that, following optimization, the\n\t\t\t\t\tLOS thermal drift angle decreased from 0.03499\n                    <jats:sup>\n                      <jats:italic>\u2032<\/jats:italic>\n                      <jats:italic>\u2032<\/jats:italic>\n                    <\/jats:sup>\n                    \/\n                    <jats:italic\/>\n                    <jats:sup>\u2218<\/jats:sup>\n                    C to 0.02435\n                    <jats:sup>\n                      <jats:italic>\u2032<\/jats:italic>\n                      <jats:italic>\u2032<\/jats:italic>\n                    <\/jats:sup>\n                    \/\n                    <jats:italic\/>\n                    <jats:sup>\u2218<\/jats:sup>\n                    C under a 5\u00b0C temperature increase,\n\t\t\t\t\tyielding a 30.4% reduction. The measured LOS thermal drift angle was 0.02641\n                    <jats:sup>\n                      <jats:italic>\u2032<\/jats:italic>\n                      <jats:italic>\u2032<\/jats:italic>\n                    <\/jats:sup>\n                    \/\n                    <jats:italic\/>\n                    <jats:sup>\u2218<\/jats:sup>\n                    C, deviating by only 8.46% from the\n\t\t\t\t\tsimulation result. Surface figure measurements showed that the\n\t\t\t\t\trespective surface errors of the primary, secondary, and tertiary\n\t\t\t\t\tmirrors were 0.015\n                    <jats:italic>\u03bb<\/jats:italic>\n                    ,0.017\n                    <jats:italic>\u03bb<\/jats:italic>\n                    , and 0.014\n                    <jats:italic>\u03bb<\/jats:italic>\n                    , all satisfying the star tracker\u2019s\n\t\t\t\t\ttechnical specification (RMS\u2264\n                    <jats:italic>\u03bb<\/jats:italic>\n                    \/50). Wavefront aberration measurements\n\t\t\t\t\tyielded RMS values of 0.066\n                    <jats:italic>\u03bb<\/jats:italic>\n                    ,0.068\n                    <jats:italic>\u03bb<\/jats:italic>\n                    ,0.073\n                    <jats:italic>\u03bb<\/jats:italic>\n                    ,0.072\n                    <jats:italic>\u03bb<\/jats:italic>\n                    , and 0.069\n                    <jats:italic>\u03bb<\/jats:italic>\n                    across five fields of view,\n\t\t\t\t\tconforming to the imaging system\u2019s technical specification (RMS\u22641\/14\n                    <jats:italic>\u03bb<\/jats:italic>\n                    ). The proposed optimization strategy\n\t\t\t\t\tenhances thermal stability, mitigates LOS thermal drift, and ensures\n\t\t\t\t\tthat the final design fulfills the high-precision attitude\n\t\t\t\t\tdetermination requirements for space applications.\n                  <\/jats:p>","DOI":"10.1364\/ao.577659","type":"journal-article","created":{"date-parts":[[2025,10,28]],"date-time":"2025-10-28T14:00:12Z","timestamp":1761660012000},"page":"10056","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Optimization of the mirror mounting structure for\u00a0a reflective star tracker based on integrated analysis of line-of-sight thermal stability error"],"prefix":"10.1364","volume":"64","author":[{"given":"Yansong","family":"Gao","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zongxuan","family":"Li","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012rct222","id-type":"ROR","asserted-by":"publisher"}]},{"name":"University of Chinese Academy of Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiuxin","family":"Ning","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012rct222","id-type":"ROR","asserted-by":"publisher"}]},{"name":"University of Chinese Academy of Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lin","family":"Li","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012rct222","id-type":"ROR","asserted-by":"publisher"}]},{"name":"University of Chinese Academy of Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinyu","family":"Yang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012rct222","id-type":"ROR","asserted-by":"publisher"}]},{"name":"University of Chinese Academy of Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qin","family":"Zhao","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/012rct222","id-type":"ROR","asserted-by":"publisher"}]},{"name":"University of Chinese Academy of Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2025,11,14]]},"reference":[{"key":"ao-64-33-10056-R1","doi-asserted-by":"publisher","first-page":"47","DOI":"10.1117\/12.368236","type":"journal-article","volume":"3779","author":"Alexander","year":"1999","journal-title":"Proc. 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All rights, including\n\t\t\t\t\tfor text and data mining (TDM), Artificial Intelligence (AI) training,\n\t\t\t\t\tand similar technologies, are reserved.","name":"copyright","label":"Copyright"}]}}