‘Truly-wearable’ AR combines optics, OLED microdisplay
The demonstrator stacks one OLED microdisplay onto the top edge of LetinAR’s Pin Mirror (PinMR) lens, in effect a piece of optics that implements the “Pinhole Effect” with tiny mirrors embedded in the optical glass.
The PinMR reflects the light from the microdisplay and guides it into the pupils of the AR glass’ wearer, creating a virtual image that overlaps real world sceneries as seen through the eyewear. LetinAR says that compared to traditional optical systems based on half-mirrors, diffractive optical elements and waveguides, its Pin Mirror lens is narrower and easier to manufacture, while supporting accurage colour reproductions.
Although the prototype uses a monochrome green OLED microdisplay, it could be expanded to a full-color system to integrate into glasses, caps, or helmets.
“It is an honor to collaborate with the world-renowned specialist for the customized development of OLED microdisplays, Fraunhofer FEP,” said Jeonghun Ha, CTO at LetinAR says. “The co-operation between LetinAR and Fraunhofer FEP will break down the technical barriers that have long hindered the commercialization of ‘True’ Augmented Reality (AR) glasses.”
The demonstrator convinces by a very high optical efficiency of the LetinAR technology, at present no comparably efficient transparent optics are available on the market. In combination with the extremely small-sized OLED microdisplay the new solution could find its way in future AR glasses
LetinAR – www.letinar.com
Fraunhofer FEP – www.fep.fraunhofer.de
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