DCSIMG

AR / MR: This is how the light guide technology works

The light guide technology envisions even deeper immersion in Augmented and Mixed Reality – discover how it works.

The light guide technology envisions even deeper immersion in Augmented and Mixed Reality – discover how it works.

The future of Augmented Reality (AR) and Mixed Reality (MR) is literally right in front of our eyes: After passing the eye in so-called plane waves, light is reaching the human retina as an image point. Aiming to produce the clearest and sharpest images possible, AR/MR glasses try their best to smoothly guiding the plane light waves into the eye.

With the new generation of SCHOTT RealView™ high-index glass wafers, manufacturers of AR and MR glasses are now able to realize a new era of smart devices and boost users’ experiences. With a further increased refractive index of 1.9, the new product portfolio of SCHOTT enables a Field of View (FOV) of up to 53° horizontally and up to 65° diagonally – which is wider than any AR device that is currently on sale (as of June 2019). Thus, this development both meets the unique demands of the industry and envisions even more immersive AR and MR applications.

This is how the light guide technology works:

1

Projector emits the light waves of the digital image in the direction of the light guides (SCHOTT RealView™).

2

The projector‘s light waves are coupled into the light guide at a defined position with the help of a grating.

3

Light waves of each color are coupled out n times in the defined grating area. Since each human eye is individually shaped, the light waves must be decoupled n times. (Light guide technology typically uses three glass wafers, each one serving as a light guide for one color in the red-green-blue (RGB) color space. In this simplified image, only one RGB image is shown).

4

The mobile, unfixed human eye perceives both the digital and the real image. This creates the impression of an augmented reality.

May, 9th 2019

Contact

Dr. Ruediger Sprengard
Advanced Optics
SCHOTT AG

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