Fig. 7
From: Ultracompact multifunctional metalens visor for augmented reality displays
Imaging results of the metalens-visor. (a to c) Demonstration of single-color AR imaging under red (633 nm) laser illumination. The images are focused at (a) 150 mm (dial), (b) 600 mm (puppet) and (c) 2000 mm (“SJTU”), respectively. (d, e) Demonstration of multi-color AR and (f) corresponding VR imaging under red (633 nm), green (532 nm) and blue (457 nm) laser illumination. The images are focused at (d) 200 mm (puppet) and (e) 1200 mm (logo and texts), respectively. The real objects will become blurry or clear as the focus changes, while the virtual images are always clear due to the Maxwellian View display technique