Augmented reality optical lens with eye protection function and preparation method therefor

An augmented reality optical-lens device with eye protection function, comprising:

• a lens which comprises a substrate made of silicon carbide material, with optical thin-film structures disposed on both sides of the substrate, respectively;
• wherein
• the optical thin-film structure on a side facing a human eye sequentially comprises an infrared radiation layer, an infrared reflection layer, and a low-refractive-index dielectric layer;
• and the optical thin-film structure on a side facing an environment sequentially comprises an infrared reflection layer and an infrared radiation layer;
• and
• a thermally conductive tape, with one end thermally connected to the lens, and the other end arranged outside the lens and connecting at least one heating element in the device;
• wherein
• when the at least one heating element in the device generates heat, the heat is distributed across the lens by utilizing a thermal conductivity of silicon carbide for heat exchange and dissipation with surrounding air;
• and in outdoor conditions, optical thin films are used to regulate a direction of infrared radiation, so that the heat radiates away from the human eye in an atmospheric window band;
• wherein
• the infrared radiation layer facing the environment has an infrared emissivity of above 0.5 in the atmospheric window band, the infrared radiation layer facing the human eye has an infrared emissivity of below 0.6 in the atmospheric window band;
• both of the infrared radiation layers have a transmittance of above 0.55 in a wavelength range from 455 nm to 700 nm and of no more than 0.7 in a wavelength range from 200 nm to 380 nm, and block over 5% of blue light in a wavelength range from 380 nm to 455 nm;
• the atmospheric window band of the infrared reflection layers is between 8 μm and 14 μm, and the infrared reflection layers are made of an optical thin-film material with high transmittance in a visible light range and a reflectivity of above 50% in the atmospheric window band.