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Express"],"published-print":{"date-parts":[[2026,3,23]]},"abstract":"<jats:p>For mid-infrared (3\u20135\u2005\u03bcm) asteroid detection scenarios characterized by weak targets and strong background radiation, this study addresses the dynamic range mismatch caused by zodiacal background emission and proposes a high-dynamic-range detection approach based on a digital micromirror device (DMD). The DIRBE-model-based prediction of zodiacal radiation is first used as a prior. Then, an on-orbit observation residual equation is constructed to correct the background parameters. The directional radiance field is mapped into a two-dimensional intensity matrix, from which pixel-level duty-cycle weights are derived and decomposed into binary mask images to drive the DMD, thereby achieving pixel-level exposure-time modulation. This method effectively avoids the issue in conventional dimming schemes where stellar targets are simultaneously modulated. To verify its feasibility and engineering value, both simulation analysis and a proof-of-concept experiment were conducted. The results show that the aperture-photometry signal-to-noise ratios of multiple stars improved from undetectable to detectable levels, with enhanced contrast and overall target visibility. In summary, the proposed method achieves on-orbit suppression of strong zodiacal background radiation and pixel-level dynamic range extension, providing a feasible system solution and practical reference for next-generation asteroid detection payloads.<\/jats:p>","DOI":"10.1364\/oe.584233","type":"journal-article","created":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T05:00:08Z","timestamp":1770699608000},"page":"9767","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["HDR optical\u2013algorithm co-design of space-based asteroid detection systems based on background radiation priors"],"prefix":"10.1364","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-4048-4789","authenticated-orcid":true,"given":"Zhenyuan","family":"Guo","sequence":"first","affiliation":[{"name":"Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences"},{"name":"University of Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-8875-6227","authenticated-orcid":true,"given":"Chen","family":"Wang","sequence":"additional","affiliation":[{"name":"Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Long","family":"Han","sequence":"additional","affiliation":[{"name":"Beijing Institute of Remote Sensing Information"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Junjie","family":"Liang","sequence":"additional","affiliation":[{"name":"Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences"},{"name":"University of Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xu","family":"Zhang","sequence":"additional","affiliation":[{"name":"Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences"},{"name":"University of Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-2132-1851","authenticated-orcid":true,"given":"Yingming","family":"Zhao","sequence":"additional","affiliation":[{"name":"Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guanyu","family":"Mu","sequence":"additional","affiliation":[{"name":"Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences"},{"name":"University of Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiale","family":"Chen","sequence":"additional","affiliation":[{"name":"Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences"},{"name":"University of Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chunyu","family":"Liu","sequence":"additional","affiliation":[{"name":"Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"285","published-online":{"date-parts":[[2026,3,11]]},"reference":[{"key":"oe-34-6-9767-R1","doi-asserted-by":"publisher","first-page":"96","DOI":"10.1016\/j.pss.2018.03.007","type":"journal-article","volume":"157","author":"Gallardo","year":"2018","journal-title":"Planet. 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