| abstract |
The present specification is lighter than glass or tempered glass used in conventional display substrates, has excellent surface flatness and thickness uniformity, has excellent strength and hardness, can implement various colors, and can implement a high refractive index, The present invention relates to a plastic substrate for an optical lens having excellent optical properties due to a low refractive index deviation of both surfaces, a method for manufacturing the same, and a diffractive light guide plate and a wearable device including the same. |