Comparing with the new lens ,it is found that more light can be through. There is low refractive coatings Zinc oxide on the glass which is eroded by the weak acid, it can reduce the reflectivity of the glass surface.This […]
Comparing with the new lens ,it is found that more light can be through. There is low refractive coatings Zinc oxide on the glass which is eroded by the weak acid, it can reduce the reflectivity of the glass surface.This […]