{"id":2124,"date":"2025-11-10T16:43:56","date_gmt":"2025-11-10T14:43:56","guid":{"rendered":"https:\/\/sites.uef.fi\/openar\/?page_id=2124"},"modified":"2026-10-09T09:57:35","modified_gmt":"2026-10-09T06:57:35","slug":"openarm","status":"publish","type":"page","link":"https:\/\/sites.uef.fi\/openar\/openarm\/","title":{"rendered":"OpenAR-M"},"content":{"rendered":"\n
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OpenAR-M is a lightweight augmented reality headset designed around simplicity.<\/em><\/figcaption><\/figure>\n\n\n\n

OpenAR-M introduces environmental sensing through an integrated temperature and humidity sensor that measures ambient conditions every few seconds. The measurements are displayed on the OLED screen and projected directly into the user\u2019s field of view through the optical system.<\/p>\n\n\n\n

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Checking the humidity and temperature of the UEF 3D-printing room with an OpenAR-M headset.<\/em><\/figcaption><\/figure>\n\n\n\n

OpenAR-M is smaller, lighter and easier to build than its predecessors. Unlike the previous models, the image is reflected only to a single eye. With a weight of 100 g, this model can be worn like regular eyeglasses. Additionally, the components have been positioned towards the temples as much as possible to reduce pressure and improve balance.<\/p>\n\n\n\n

Optical design<\/h2>\n\n\n\n

The optical system consists of an OLED display, a mirror, a lens, and a partially reflective glass plate. Light emitted by the display is first reflected by the mirror and then passes through the lens, which collimates the light. The collimated light is then reflected by the glass plate into the user\u2019s right eye, creating a virtual image within the user\u2019s field of view. The user can simultaneously see both the projected information and the surrounding environment.<\/p>\n\n\n\n

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Optical path of OpenAR-M. Light from the OLED display is reflected by a mirror, collimated by a lens, and redirected toward the user\u2019s eye by a partially reflective glass plate.<\/em><\/figcaption><\/figure>\n\n\n\n

Because the light reaching the eye is collimated, the virtual image appears at a comfortable viewing distance. This reduces the need for the eye to constantly refocus between the displayed information and the surrounding environment.<\/p>\n\n\n\n

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OpenAR-M can be worn outdoors as well.<\/em><\/figcaption><\/figure>\n\n\n\n

How to make it?<\/h2>\n\n\n\n

To build the OpenAR-M headset, we used the components listed below. Note\u2014they are only examples; many of them can easily be replaced. The following links will take you to retailers where you can purchase the parts or look for similar products. Prices vary depending on the supplier; however, the OpenAR-M glasses can typically be built for approximately 90 \u20ac.<\/p>\n\n\n\n