{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T10:29:36Z","timestamp":1785407376462,"version":"3.56.0"},"reference-count":31,"publisher":"Optica Publishing Group","issue":"26","license":[{"start":{"date-parts":[[2022,9,2]],"date-time":"2022-09-02T00:00:00Z","timestamp":1662076800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2022,9,2]],"date-time":"2022-09-02T00:00:00Z","timestamp":1662076800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"DOI":"10.13039\/501100006087","name":"Direcci\u00f3n General de Asuntos del Personal Acad\u00e9mico, Universidad Nacional Aut\u00f3noma de M\u00e9xico","doi-asserted-by":"publisher","award":["PAPIIT IG100121"],"award-info":[{"award-number":["PAPIIT IG100121"]}],"id":[{"id":"10.13039\/501100006087","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100006087","name":"Direcci\u00f3n General de Asuntos del Personal Acad\u00e9mico, Universidad Nacional Aut\u00f3noma de M\u00e9xico","doi-asserted-by":"publisher","award":["PAPIIT IN107821"],"award-info":[{"award-number":["PAPIIT IN107821"]}],"id":[{"id":"10.13039\/501100006087","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003141","name":"Consejo Nacional de Ciencia y Tecnolog\u00eda","doi-asserted-by":"publisher","award":["CF-MG-2019-214961"],"award-info":[{"award-number":["CF-MG-2019-214961"]}],"id":[{"id":"10.13039\/501100003141","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Appl. Opt."],"published-print":{"date-parts":[[2022,9,10]]},"abstract":"<jats:p>\n                    An accurate location of the focal position with respect to a solid target is a key task for different applications, for instance, in laser driven plasma acceleration for x-ray generation where minimum required intensities are above\n                    <jats:inline-formula>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"inline\">\n                        <mml:mrow class=\"MJX-TeXAtom-ORD\">\n                          <mml:msup>\n                            <mml:mn>10<\/mml:mn>\n                            <mml:mrow class=\"MJX-TeXAtom-ORD\">\n                              <mml:mn>14<\/mml:mn>\n                            <\/mml:mrow>\n                          <\/mml:msup>\n                        <\/mml:mrow>\n                        <mml:mspace width=\"thickmathspace\"\/>\n                        <mml:mrow class=\"MJX-TeXAtom-ORD\">\n                          <mml:mi mathvariant=\"normal\">W<\/mml:mi>\n                        <\/mml:mrow>\n                        <mml:mrow class=\"MJX-TeXAtom-ORD\">\n                          <mml:mo>\/<\/mml:mo>\n                        <\/mml:mrow>\n                        <mml:mrow class=\"MJX-TeXAtom-ORD\">\n                          <mml:msup>\n                            <mml:mrow class=\"MJX-TeXAtom-ORD\">\n                              <mml:mi mathvariant=\"normal\">c<\/mml:mi>\n                              <mml:mi mathvariant=\"normal\">m<\/mml:mi>\n                            <\/mml:mrow>\n                            <mml:mn>2<\/mml:mn>\n                          <\/mml:msup>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    . For such practical applications, new approaches for focus location and target delivery techniques are needed to achieve the required intensity, repeatability, and stability. There are different techniques to accomplish the focusing and target positioning task such as interferometry-, microscopy-, astigmatism-, and nonlinear-optics-based techniques, with their respective advantages and limitations. We present improvements of a focusing technique based on an astigmatic method with potential applications where maximum intensity at the target position is necessary. The presented technique demonstrates high accuracy up to 5\u00a0\u00b5m, below the Rayleigh range, and also its capability to work in rough surfaces targets and tilt tolerance of the target, with respect to the normal of the target surface.\n                  <\/jats:p>","DOI":"10.1364\/ao.469110","type":"journal-article","created":{"date-parts":[[2022,8,19]],"date-time":"2022-08-19T10:00:15Z","timestamp":1660903215000},"page":"7539","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["High accuracy astigmatic-focusing system for laser targets"],"prefix":"10.1364","volume":"61","author":[{"given":"J.","family":"Delgado-Aguill\u00f3n","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/01tmp8f25","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Universidad de Salamanca"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C.","family":"Ru\u00edz","sequence":"additional","affiliation":[{"name":"Universidad de Salamanca"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6030-5496","authenticated-orcid":true,"given":"M.","family":"Rosete-Aguilar","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/01tmp8f25","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1138-8667","authenticated-orcid":true,"given":"J.","family":"Gardu\u00f1o-Mej\u00eda","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/01tmp8f25","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2022,9,2]]},"reference":[{"key":"ao-61-26-7539-R1","doi-asserted-by":"publisher","first-page":"E18","DOI":"10.1017\/hpl.2020.15","volume":"8","author":"Martin","year":"2020","journal-title":"High Power Laser Sci. 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