Glass beads are made by firing glass sand. According to the size, glass beads can be divided into glass beads (glass beads are a kind of glass beads and refer to solid spheres with a particle size of less than 1 mm) and glass beads. According to the use, it can be divided into reflective glass beads, sandblasting glass beads, grinding glass beads, and filling glass beads. Among them, reflective glass beads can be divided into safety protection reflective glass beads and screen glass beads ; According to the refractive index, it can be divided into general refractive index and high refractive index glass beads. The general refractive index is between 1.5-1.64, and the high refractive index is generally 1.8-2.2. Assuming that the most suitable for reflection is glass beads with a refractive index of 1.93, this refractive index can be satisfactorily refracted back to parallel rays, so the higher the refractive index is not the best reflection.
