Editing Retroreflector (section)

===Other uses===
Retroreflectors are used in the following example applications:
*In common (non-SLR) digital cameras, the sensor system is often retroreflective. Researchers have used this property to demonstrate a system to prevent unauthorized photographs by detecting digital cameras and beaming a highly focused beam of light into the lens.<ref>{{cite web |last=Eng |first=Paul |date=2005-09-19 |title=Device Seeks to Jam Covert Digital Photographers |url=https://abcnews.go.com/Technology/FutureTech/story?id=1139800&page=1 |url-status=live |archive-url=https://web.archive.org/web/20240120175219/https://abcnews.go.com/Technology/FutureTech/story?id=1139800&page=1 |archive-date=2024-01-20 |access-date=2018-04-06 |website=ABC News |language=en}}</ref>
*In movie screens to allow for high brilliance under dark conditions.<ref>{{cite web |last1=Harris |first1=William |last2=Lamb |first2=Robert |date=2005-07-20 |title=How Does an Invisibility Cloak Work? |url=https://science.howstuffworks.com/invisibility-cloak.htm#pt1 |url-status=live |archive-url=https://web.archive.org/web/20230921232249/https://science.howstuffworks.com/invisibility-cloak.htm#pt1 |archive-date=2023-09-21 |access-date=2018-04-06 |website=HowStuffWorks |language=en}}</ref>
* [[Digital compositing]] programs and [[chroma key]] environments use retroreflection to replace traditional lit backdrops in composite work as they provide a more solid color without requiring that the backdrop be lit separately.<ref>{{cite web |last1=Thomas |first1=Graham |date=2009-12-06 |title=Making things Vanish - The Truematte Technology |url=https://www.bbc.co.uk/blogs/legacy/researchanddevelopment/2009/12/making-things-vanish-the-truem.shtml |url-status=dead |archive-url=https://web.archive.org/web/20170705092201/http://www.bbc.co.uk/blogs/researchanddevelopment/2009/12/making-things-vanish-the-truem.shtml |archive-date=2017-07-05 |access-date=2014-10-25 |website=BBC |language=en}}</ref>
* In Longpath-[[Differential optical absorption spectroscopy|DOAS]] systems retroreflectors are used to reflect the light emitted from a lightsource back into a telescope. It is then spectrally analyzed to obtain information about the trace gas content of the air between the telescope and the retro reflector.
* [[Barcode]] labels can be printed on retroreflective material to increase the range of scanning up to 50 feet.<ref>{{cite web |last=Thermal |first=Timmy |date=2014-07-08 |title=Retroreflective Labels |url=https://midcomdata.com/reflective-labels/ |url-status=live |archive-url=https://web.archive.org/web/20230925015638/https://midcomdata.com/reflective-labels/ |archive-date=2023-09-25 |access-date=2014-07-16 |publisher=Midcom Data Technologies, Inc. |language=en}}</ref>
*In a form of [[3D display]]; where a [[Retroreflective sheeting|retro-reflective sheeting]] and a set of projectors is used to project stereoscopic images back to user's eye. The use of [[pico projector|mobile projectors]] and [[Inertial measurement unit|positional tracking]] mounted on user's spectacles frame allows the illusion of a hologram to be created for [[Computer-generated imagery|computer generated imagery]].<ref>{{cite web|url=http://www.creol.ucf.edu/Research/Publications/1467.PDF |title=Design of an ultra-light head-mounted projective display (HMPD) and its applications in augmented collaborative environments |publisher=Proceedings of SPIE |year=2002}}</ref><ref>{{cite web|url=https://patents.google.com/patent/US20160277725 |title=Retroreflective light field display |publisher= US Patent & Trademark Office |date=2016-09-22 }}</ref><ref>{{cite web|url=https://www.youtube.com/watch?v=H3HGrclGkIE  |archive-url=https://ghostarchive.org/varchive/youtube/20211211/H3HGrclGkIE| archive-date=2021-12-11 |url-status=live|title=castAR Test Footage - Flight Simulator  |publisher=YouTube |date=2013-09-26 }}{{cbignore}}</ref>
*Flashlight fish of the family [[Anomalopidae]] have natural retroreflectors. See [[tapetum lucidum]].