Photochromic film
Photochromic films allow for a simple way to retrofit existing windows by simply attaching them to the existing windows, reducing implementation costs and eliminating the need for additional energy inputs. The photochromic film can automatically adjust the light transmittance according to the sunlight intensity, which can effectively reduce the indoor temperature, reduce the indoor cooling energy consumption, improve the energy efficiency of the building, and can improve the indoor daylight comfort, and can avoid excessive brightness and glare when the sunlight is strong, and will not affect the indoor lighting when the sunlight is weak. Also, since the change in transmittance is not due to scattering, it does not affect the long-term field of view.
