Editing Arago spot (section)

== Other applications==

Beside the demonstration of wave-behavior, the Arago spot also has a few other applications. One of the ideas is to use the Arago spot as a straight line reference in alignment systems.<ref>[http://www.slac.stanford.edu/econf/C971013/papers/047.PDF Feier et al.]</ref> Another is to probe aberrations in laser beams by using the spot's sensitivity to beam [[optical aberration|aberrations]].<ref name="harvey1984"/>  Finally, the [[aragoscope]] has been proposed as a method for dramatically improving the diffraction-limited resolution of space-based telescopes.<ref>{{cite web|title=The Aragoscope: Ultra-High Resolution Optics at Low Cost|url=https://www.nasa.gov/content/the-aragoscope-ultra-high-resolution-optics-at-low-cost/#.U5givlKSz8s|website=NASA|access-date=9 February 2017}}</ref><ref>{{cite web|url=http://www.colorado.edu/today/2015/01/23/new-space-telescope-concept-could-image-objects-far-higher-resolution-hubble|website=CU Bolder Today|access-date=9 February 2017|title=New space telescope concept could image objects at far higher resolution than Hubble|date=23 January 2015}}</ref>