Home›Optical illusions›Siemens star🌐EnglishEnglishDeutschEspañolFrançaisItalianoPortuguêsTürkçeРусскийEntityQ1362583· pop 10· linked from 6 articlesSiemens starAlso known as spoke targetA device used to test the resolution of optical instruments, printers or displays.Wikidata factsImageSiemens star.svgSources (1)wikidata.orgvia Wikidata · CC0Available in 9 languagesEspañolFrançaisDeutschРусскийPortuguêsItalianoCatalanTürkçevia Wikidata sitelinks · CC0ConnectionsopticsEntityprinterEntityCategoriesOptical illusionsVisual perception