New color-changing lenses, how to achieve accurate light perception adjustment?

Silver halide photochromic change technology: the photosensitizer silver halide (or other photosensitizers such as silver barium, copper halide and chromium halide, etc.) is added to the resin lens. When the lens is illuminated by light (especially short-wave light), the silver halide molecules break down into silver and halogen atoms, and many silver atoms accumulate together to give the lens a gray color. When the light stops, the reaction is reversible, the silver atoms and halogen atoms return to the silver halide state, and the lens color becomes lighter. The darkening and lightening of color-changing lenses are mainly related to the change in the intensity of ultraviolet radiation, and are also affected by environmental and seasonal factors. Usually in the morning the ultraviolet light is strong, the lens color is deep; In the evening, the ultraviolet light is weak, and the lens color is light. Although the ultraviolet light is weak on cloudy days, it can also make the lens discolor, but the color is lighter than that on sunny days. In addition, the temperature will also affect the discoloration effect, the temperature increases, the lens color becomes lighter; The temperature drops and the lenses become darker.

Electrochromic technology: The discoloration effect of electrochromic lenses can be controlled by an applied electric field. For example, the electrochromic lens control method applied by Hisense Video provides a constant voltage excitation signal, determines the target excitation current corresponding to the target transmission rate based on the mapping relationship, transmits the excitation signal to the electrochromic lens until the current excitation current is the same as the target excitation current, and completes the lens color adjustment, so as to achieve accurate lens color adjustment. There are also some electrochromic sunglasses, through the implantation of a chip sensitive component, at any time to sense the ambient light, with the electrochromic material under the action of an external electric field to produce stable, reversible color and transparency changes, to achieve automatic color change with the brightness of the lens.
Smart photosensitive system technology: Some smart color-changing sunglasses use smart photosensitive systems that can quickly sense changes in the surrounding light. For example, the automatic light sensing system of Leipson smart glasses can adjust the depth of the lens in 0.1 seconds, and accurately adapt to the changing light environment such as strong sunlight, shadows and tunnels. This intelligent photosensitive system usually includes advanced light sensors and supporting microprocessors, the light sensor is responsible for real-time monitoring of environmental light intensity, color and other parameters, and the information is transmitted to the microprocessor, the microprocessor according to the preset algorithm and program, quickly calculate the need to adjust the lens color depth. Then the optical characteristics of the lens are changed by a specific driving mechanism to achieve the purpose of accurate light perception adjustment.
Rare earth supramolecular photochromic technology: The rare earth supramolecular photochromic lens jointly developed by Baotou Rare Earth Research Institute and Heilongjiang University uses the advantages of light rare earth, such as large metal radius, variable value and chemical stability, to introduce rare earth into intelligent photochromic materials through inorganic and organic hybrids. Rare earth ions play a role in the construction of supramolecular structure, realizing the advantages of space limiting effect, heavy atom effect and oxidation resistance, so that the lens has a better color rate and fading rate, strong fatigue resistance and good stability, and can intelligently adjust the light transmission rate. The lens is made of self-developed rare earth supramolecular photochromic material, combined with mature basic color-changing technology, which can effectively block ultraviolet light and part of visible light and reduce the damage of strong light to the eyes.