This invention belongs to the field of photovoltaic glass technology, and relates to a double-layer coated ultra-clear patterned glass for photovoltaic modules and its preparation method. The invention includes preparing an ultra-clear patterned glass substrate, which features high light
transmittance, excellent
photoelectric conversion efficiency, and low spontaneous
breakage rate. A
magnesium fluoride layer is deposited on one side of the ultra-clear patterned glass substrate;
magnesium fluoride is a material with high light
transmittance and low
reflectivity, used to improve the light
transmittance and anti-reflection ability of the ultra-clear patterned glass. A layer of glass microspheres is deposited on the
magnesium fluoride layer to obtain the double-layer coated ultra-clear patterned glass. The
glass microsphere layer further enhances the optical performance of the double-layer coated ultra-clear patterned glass. In addition, the
glass microsphere layer also provides a certain degree of
wear resistance and
impact resistance, protecting the
magnesium fluoride layer and the ultra-clear patterned glass substrate from damage by the external environment.