{"title":"Continuous zoom freeform afocal telescope.","authors":"Chi Zhang, Jannick P Rolland, Aaron Bauer","doi":"10.1364/OL.552073","DOIUrl":null,"url":null,"abstract":"<p><p>Continuous zoom afocal systems offer great flexibility for imaging applications. This work investigates the capability and potential of using freeform optics in continuous zoom reflective systems by designing a four-mirror unobscured afocal system with zoom capabilities. The system was optimized at 2X and 3X zoom ratios with a compensated exit pupil. Freeform profiles were used on each mirror for the aberration correction necessary to facilitate the zoom motion. The minimum volume package was found for both the 2X and 3X zoom freeform designs that achieve diffraction-limited performance with less than 5% RMS pupil shape error and pupil offset error. 3x better RMS wavefront error and 3.5x better exit pupil quality were observed in the freeform design compared to the off-axis conic design with identical specifications.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 6","pages":"1827-1830"},"PeriodicalIF":3.1000,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.552073","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
Continuous zoom afocal systems offer great flexibility for imaging applications. This work investigates the capability and potential of using freeform optics in continuous zoom reflective systems by designing a four-mirror unobscured afocal system with zoom capabilities. The system was optimized at 2X and 3X zoom ratios with a compensated exit pupil. Freeform profiles were used on each mirror for the aberration correction necessary to facilitate the zoom motion. The minimum volume package was found for both the 2X and 3X zoom freeform designs that achieve diffraction-limited performance with less than 5% RMS pupil shape error and pupil offset error. 3x better RMS wavefront error and 3.5x better exit pupil quality were observed in the freeform design compared to the off-axis conic design with identical specifications.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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