▎ 摘　　要

NOVELTY - Graphene is added into water or chloroform, diffused by ultrasound, and dispersion with graphene content of 4-20 mg/ml is obtained. The graphene dispersion is centrifuged to obtain supernatant. When water is used as solvent for diffusing, polyvinyl alcohol aqueous solution (10-20 %mass) is added into supernatant and mixed. When chloroform is used as solvent for diffusing, polymethyl methacrylate chloroform solution (8-20 %mass) is added into supernatant and mixed. The mixed solution is coated on an anti-reflection lens or a high-reflection lens to obtain saturable absorption lens. USE - Manufacture of saturable absorption lens. ADVANTAGE - The saturable absorption lens is easily and economically manufactured.