Editing Augmented reality (section)

===Head-mounted displays===
A [[head-mounted display]] (HMD) is a display device worn on the forehead, such as a harness or [[Helmet-mounted display|helmet-mounted]]. HMDs place images of virtual objects over the user's field of view. Augmented reality HMDs are either optical see-through or video passthrough.<ref name="j124">{{cite web | last=Boland | first=Mike | title=Passthrough vs. Seethrough AR: The Answer is 'Both' | website=AR Insider | date=2024-11-07 | url=https://arinsider.co/2024/11/07/passthrough-vs-seethrough-ar-the-answer-is-both/ | access-date=2025-04-21}}</ref><ref name="c649">{{cite conference | last=Rolland | first=Jannick P. | last2=Holloway | first2=Richard L. | last3=Fuchs | first3=Henry | title=Comparison of optical and video see-through, head-mounted displays | date=1995-12-21 | doi=10.1117/12.197322 | url=https://www.spiedigitallibrary.org/redirect/proceedings/proceeding?articleid=981546 | access-date=2025-04-21 | page=293–307}}</ref> Modern HMDs often employ sensors for six [[Degrees of freedom (mechanics)|degrees of freedom]] monitoring that allow the system to align virtual information to the physical world and adjust accordingly with the user's head movements.<ref>{{Cite web |url=http://www.eweek.com/c/a/Security/Fleet-Week-Office-of-Naval-Research-Technology/4/ |title=Fleet Week: Office of Naval Research Technology |date=28 May 2012 |website=eweek.com |access-date=18 June 2019}}</ref><ref>Rolland, Jannick; Baillott, Yohan; Goon, Alexei.[https://web.archive.org/web/20200227120212/https://pdfs.semanticscholar.org/ce53/48128f94f3383bdc4eb15fb4eaf3721d521f.pdf A Survey of Tracking Technology for Virtual Environments], Center for Research and Education in Optics and Lasers, University of Central Florida.</ref><ref>{{Cite web |url=http://campar.in.tum.de/twiki/pub/Chair/TeachingSs07ArProseminar/1_Display-Systems_Klepper_Report.pdf |title=Augmented Reality - Display Systems |last=Klepper |first=Sebastian |website=campar.in.tum.de |archive-url=https://web.archive.org/web/20130128175343/http://campar.in.tum.de/twiki/pub/Chair/TeachingSs07ArProseminar/1_Display-Systems_Klepper_Report.pdf |archive-date=28 January 2013 |url-status=dead |access-date=18 June 2019}}</ref> When using AR technology, the HMDs only require relatively small displays. In this situation, [[liquid crystal on silicon]] (LCOS) and micro-OLED (organic light-emitting diodes) are commonly used.<ref>{{Cite journal |last=Komura |first=Shinichi |date=2024-07-19 |title=Optics of AR/VR using liquid crystals |journal=Molecular Crystals and Liquid Crystals |volume=768 |issue=17 |language=en |pages=1014–1039 |doi=10.1080/15421406.2024.2379694 |issn=1542-1406|doi-access=free |bibcode=2024MCLC..768.1014K }}</ref> HMDs can provide VR users with mobile and collaborative experiences.<ref>{{cite journal |last1=Rolland |first1=Jannick P. |last2=Biocca |first2=Frank |last3=Hamza-Lup |first3=Felix |last4=Ha |first4=Yanggang |last5=Martins |first5=Ricardo |title=Development of Head-Mounted Projection Displays for Distributed, Collaborative, Augmented Reality Applications |journal=Presence: Teleoperators and Virtual Environments |date=October 2005 |volume=14 |issue=5 |pages=528–549 |doi=10.1162/105474605774918741 |s2cid=5328957 |url=https://stars.library.ucf.edu/facultybib2000/5607 |arxiv=1902.07769 }}</ref> Specific providers, such as [[uSens]] and [[Gestigon]], include [[Gesture recognition|gesture controls]] for full virtual [[Immersion (virtual reality)|immersion]].<ref>{{cite web|title=Gestigon Gesture Tracking – TechCrunch Disrupt|url=https://techcrunch.com/video/gestigon-gesture-tracking/517762030/|website=TechCrunch|access-date=11 October 2016}}</ref><ref>{{cite web|last1=Matney|first1=Lucas|title=uSens shows off new tracking sensors that aim to deliver richer experiences for mobile VR|url=https://techcrunch.com/2016/08/29/usens-unveils-vr-sensor-modules-with-hand-tracking-and-mobile-positional-tracking-tech-baked-in/|website=TechCrunch|date=29 August 2016 |access-date=29 August 2016}}</ref>

AR headsets typically have a field of view of about 30 to 50 degrees per eye.<ref name="x344">{{cite web | last=Crisostomo | first=Christian | title=Introduction To AR Headsets Technology: The Field Of View | website=ARPost | date=2018-09-27 | url=https://arpost.co/2018/09/27/introduction-to-ar-headsets-technology-the-field-of-view/ | access-date=2025-04-21}}</ref>

[[Vuzix]] is a company that has produced a number of head-worn optical see through displays marketed for augmented reality.<ref>{{cite web |title=Images Of The Vuzix STAR 1200 Augmented Reality Glasses |url=https://techcrunch.com/2011/06/04/images-of-the-vuzix-star-1200-augmented-reality-glasses/ |website=TechCrunch |date=5 June 2011 |access-date=26 March 2024}}</ref><ref>{{cite web |title=Vuzix Blade AR glasses are the next-gen Google Glass we've all been waiting for |date=9 January 2018 |url=https://www.theverge.com/2018/1/9/16869174/vuzix-blade-ar-glasses-augmented-reality-amazon-alexa-ai-ces-2018 |access-date=26 March 2024}}</ref><ref>{{cite web |title=Hands On: Vuzix's No-Nonsense AR Smart Glasses |date=28 February 2017 |url=https://www.pcmag.com/news/hands-on-vuzixs-no-nonsense-ar-smart-glasses |access-date=26 March 2024}}</ref>

Near-eye augmented reality devices can be used as portable head-up displays as they can show data, information, and images while the user views the real world. This is basically what a head-up display does; however, practically speaking, augmented reality is expected to include registration and tracking between the superimposed perceptions, sensations, information, data, and images and some portion of the real world.<ref>{{Cite web|title = What is Augmented Reality (AR): Augmented Reality Defined, iPhone Augmented Reality Apps and Games and More|url = http://www.digitaltrends.com/features/what-is-augmented-reality-iphone-apps-games-flash-yelp-android-ar-software-and-more/|website = [[Digital Trends]]|access-date = 8 October 2015|date = 3 November 2009}}</ref>