| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing a novel optical element capable of arbitrarily and easily controlling the refractive index of a material composed of a substance of natural origin such as silk fibroin, and an optical element produced thereby. Providing a device. SOLUTION: A method for producing an optical element, which comprises forming a biopolymer as a main component, irradiating light so as to induce a change in refractive index, and / or heating, and produced by the method It consists of an optical element. |