▎ 摘　　要

NOVELTY - The cloak has an adjustable three-dimensional (3D) optically invisible cloak main body provided with a substrate layer, a graphene ring layer, a surface covering layer, an inner support shell, a control unit and a power supply unit. The surface cover ring layer is fixed with the graphene ring layer. A hidden object is fixed with the inner support shell that is drilled with a hole. A lead is connected with the graphene ring layer. The control unit and the power supply unit are grounded. A light field is restored with an original 3D distribution to realize an optical hiding function. USE - Multi-layer graphene ring layer based adjustable 3D optical invisibility cloak. ADVANTAGE - The cloak can control graphene ring layer fermi distribution, so as to realize optical invisible cloak time on-off performance, hence reducing uncirculated switch of the optical invisible cloak. DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a multi-layer graphene ring layer based adjustable three-dimensional optical invisibility cloak.