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Augmented Reality (AR) or smart glasses might be the next big thing in the field of wearable consumer electronics. Ideas, concepts and even products exist since a while but still they are all quite far away from being perfect. AR glasses act as an add-on to the smartphone or -watch, bringing the visual content to the line of sight with no need to look at the mobile device’s display. All-day-use glasses need to look fashionable, need to provide a high level of wearing comfort (weight, heat dissipation) and should provide a reasonable battery live time which enables several hours of operation. Laser Beam Scanning (LBS) might be the display technology of choice for such consumer AR glasses because it enables ultra-small optical engine sizes of below 1cc and the laser diodes can be switched off for image areas without content. But there are also many technical challenges to overcome. Beside the complexity of the scanning itself the interaction of the coherent laser light with the optical combiner optics can lead to image artefact. In this paper we present the ams- Osram laser source solution and give an outlook how to further improve system performance.
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Stefan Morgott, Karl Leahy, Florian Rommen, Jörg-Erich Sorg, Steffen Strauss, "Laser-based projection displays for all-day-use consumer AR glasses," Proc. SPIE 12449, Optical Architectures for Displays and Sensing in Augmented, Virtual, and Mixed Reality (AR, VR, MR) IV, 124490J (16 March 2023); https://doi.org/10.1117/12.2657215