光学材料是用于光学实验和光学仪器中的具有一定光学性质和功能的材料的统称。

        光介质材料是传输光线的材料。入射的光线经过折射、反射会改变光线的方向、位相和偏振态；还可经过吸收或散射改变光线的强度和光谱成分。传统上常把光学材料限定为晶态（光学晶体）、非晶态（光学玻璃）、有机化合物（光学塑料）。

        Optical materials are a general term for materials with certain optical properties and functions used in optical experiments and optical instruments.

       Optical dielectric materials are materials that transmit light. The incident light will change the direction, phase and polarization state of the light after refraction and reflection. It can also be absorbed or scattered to change the intensity and spectral composition of light. Traditionally, optical materials have been limited to crystalline states (optical crystals), amorphous states (optical glasses), and organic compounds (optical plastics).