SCHOTT high-index glass wafers improve augmented reality devices

RealView glass doubles the TIR angle, enabling a larger field of view (FOV) in AR devices.

SCHOTT RealView glass wafers are made from optical glass with a high refractive index, enabling a wider field of view (FOV) in AR devices. (Image credit: SCHOTT)
SCHOTT RealView glass wafers are made from optical glass with a high refractive index, enabling a wider field of view (FOV) in AR devices. (Image credit: SCHOTT)

IMAGE:SCHOTT RealView glass wafers are made from optical glass with a high refractive index, enabling a wider field of view (FOV) in AR devices. (Image credit: SCHOTT)

SCHOTT (Mainz, Germany) has developed optical glass wafers for augmented reality (AR) applications--branded as SCHOTT RealView--that double the total internal reflection angle compared to conventional glass wafers, enabling a larger field of view (FOV) in AR devices. SCHOTT says its RealView wafers give AR device manufacturers the first opportunity to expand the FOV almost to the limit of human peripheral vision, laying the groundwork for sizeable advances in this transformative consumer tech field.

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SCHOTT produces raw glass in its high-tech melting facilities in Germany, and the wafer manufacturing and optical coating takes place in China, where SCHOTT recently announced a joint venture investment together with Zhejiang Crystal-Optech. "Augmented reality should still look like reality," said Rüdiger Sprengard, VP and head of Augmented Reality, Advanced Optics at SCHOTT. "To raise the bar and meet the requirements of this rapidly expanding market, manufacturers need superior optical wafers with qualities a full order of magnitude greater than what has previously appeared on the market--a challenge SCHOTT scientists and engineers have accepted in the spirit of pushing the limits of process technology and metrology."

Over the past few years, researchers at SCHOTT have leveraged their expertise in melting and surface processing of optical materials while working alongside AR technologists to understand the needs of the industry. "We have the advantage of being a fully integrated supplier, covering every step of the process to control properties that are key to the quality of the image: glass melt, wafer processing, and optical coatings," said Sprengard. "We have invested in the infrastructure to ensure we're fully capable of ramping-up production to meet demand."

SCHOTT RealView glass wafers are available with tailored refractive index and excellent light guiding properties. As a result of engineering innovation, SCHOTT RealView is 10 times flatter, measured as total thickness variation (TTV), than industry standard glass wafers.

SOURCE: SCHOTT; https://www.us.schott.com/english/news/press.html?NID=com5406

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