Smartphone screens as astrometric calibrators

IF 1.5 Q3 ASTRONOMY & ASTROPHYSICS Journal of Astronomical Instrumentation Pub Date : 2023-03-09 DOI:10.1142/s2251171723500095
Aidan Walk, C. Claveau, M. Bottom, M. Chun, S. Jacobson, M. Service, Jessica R. Lu
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Abstract

Geometric optical distortion is a significant contributor to the astrometric error budget in large telescopes using adaptive optics. To increase astrometric precision, optical distortion calibration is necessary. We investigate using smartphone OLED screens as astrometric calibrators. Smartphones are low cost, have stable illumination, and can be quickly reconfigured to probe different spatial frequencies of an optical system's geometric distortion. In this work, we characterize the astrometric accuracy of a Samsung S20 smartphone, with a view towards providing large format, flexible astrometric calibrators for the next generation of astronomical instruments. We find the placement error of the pixels to be 189 nm +/- 15 nm RMS. At this level of error, milliarcsecond astrometric accuracy can be obtained on modern astronomical instruments.
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智能手机屏幕是天文测量校准器
几何光学失真是使用自适应光学的大型望远镜天文测量误差预算的重要因素。为了提高天文测量精度,光学畸变校准是必要的。我们研究使用智能手机OLED屏幕作为天文校准器。智能手机成本低,照明稳定,可以快速重新配置,以探测光学系统几何失真的不同空间频率。在这项工作中,我们对三星S20智能手机的天体测量精度进行了表征,以期为下一代天文仪器提供大尺寸、灵活的天体测量校准器。我们发现像素的放置误差为189nm+/-15nmRMS。在这个误差水平上,现代天文仪器可以获得毫弧秒的天文测量精度。
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来源期刊
Journal of Astronomical Instrumentation
Journal of Astronomical Instrumentation ASTRONOMY & ASTROPHYSICS-
CiteScore
2.30
自引率
7.70%
发文量
19
期刊介绍: The Journal of Astronomical Instrumentation (JAI) publishes papers describing instruments and components being proposed, developed, under construction and in use. JAI also publishes papers that describe facility operations, lessons learned in design, construction, and operation, algorithms and their implementations, and techniques, including calibration, that are fundamental elements of instrumentation. The journal focuses on astronomical instrumentation topics in all wavebands (Radio to Gamma-Ray) and includes the disciplines of Heliophysics, Space Weather, Lunar and Planetary Science, Exoplanet Exploration, and Astroparticle Observation (cosmic rays, cosmic neutrinos, etc.). Concepts, designs, components, algorithms, integrated systems, operations, data archiving techniques and lessons learned applicable but not limited to the following platforms are pertinent to this journal. Example topics are listed below each platform, and it is recognized that many of these topics are relevant to multiple platforms. Relevant platforms include: Ground-based observatories[...] Stratospheric aircraft[...] Balloons and suborbital rockets[...] Space-based observatories and systems[...] Landers and rovers, and other planetary-based instrument concepts[...]
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