I used : abacus crystal : 20 bead 4mm, 20 bead 6mm Soft copper wire 20 gauge ( wire diameter 0.8mm ) : 2 strands, each 45cm long ( 18 inch) ...
Modern imaging systems, such as those used in smartphones, virtual reality (VR), and augmented reality (AR) devices, are constantly evolving to become more compact, efficient, and high-performing.