{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T10:09:44Z","timestamp":1792490984660,"version":"4.5.0"},"reference-count":23,"publisher":"Optica Publishing Group","issue":"22","license":[{"start":{"date-parts":[[2024,10,7]],"date-time":"2024-10-07T00:00:00Z","timestamp":1728259200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR-OA"},{"start":{"date-parts":[[2024,10,7]],"date-time":"2024-10-07T00:00:00Z","timestamp":1728259200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"DOI":"10.13039\/501100005151","name":"Chinese Academy of Sciences Key Project","doi-asserted-by":"publisher","award":["KGFZD-145-23-04"],"award-info":[{"award-number":["KGFZD-145-23-04"]}],"id":[{"id":"10.13039\/501100005151","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Express"],"published-print":{"date-parts":[[2024,10,21]]},"abstract":"<jats:p>\n                    The geostationary orbit imaging spectrometer offers distinct advantages for diverse applications in remote sensing. To enhance swath and data richness, there is a growing trend toward spectrometers with broader fields of view (FOV) and extended slit lengths. Optical systems equipped with these features face significant challenges in aberration correction. This paper investigates the parameters of geostationary orbits and designs a spectroscopic system capable of achieving ultrawide FOV without the need for stitching spectrograph subsystems. Additionally, it also designs a front-end telescope system that matches the spectroscopic system. The spectroscopic system features a slit length of 240 mm, employing an enhanced Offner structure for a long slit spectroscopic system, incorporating a freeform surface on the third mirror. To inhibit the effects of radiation stray light, the system's exit pupil is controlled to be positioned in front of the image plane to facilitate matching with the cold shield. The analysis indicates that the spectral resolution of the long-wave infrared imaging spectrometer system is 50 nm, with a total of 90 spectral sampling channels. The system's spatial resolution is 100 m, enabling a swath width of 400 km. Furthermore, the modulation transfer function (MTF) exceeds 0.42 at the Nyquist frequency of 8.35\n                    <jats:italic toggle=\"yes\">lp<\/jats:italic>\n                    \/\n                    <jats:italic toggle=\"yes\">mm<\/jats:italic>\n                    . The maximum RMS radius of the system is less than 27\n                    <jats:italic toggle=\"yes\">\u03bcm<\/jats:italic>\n                    at wavelengths ranging from 8 to 12.5\n                    <jats:italic toggle=\"yes\">\u03bcm<\/jats:italic>\n                    .\n                  <\/jats:p>","DOI":"10.1364\/oe.537001","type":"journal-article","created":{"date-parts":[[2024,9,27]],"date-time":"2024-09-27T04:00:08Z","timestamp":1727409608000},"page":"38039","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Design of geostationary orbit ultrawide FOV long-wave infrared imaging spectrometer"],"prefix":"10.1364","volume":"32","author":[{"given":"Xingyu","family":"Chen","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02txedb84","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rongfu","family":"Zhang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02txedb84","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8434-4596","authenticated-orcid":true,"given":"Qinghua","family":"Yu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2024,10,7]]},"reference":[{"key":"oe-32-22-38039-R1","doi-asserted-by":"publisher","first-page":"090901","DOI":"10.1117\/1.OE.52.9.090901","volume":"52","author":"Hagen","year":"2013","journal-title":"Opt. 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