Effect of Drawing Speed on Properties of the Anti-reflective SiO2 Film Based on Glass

The anti-reflective SiO2 film on glass was prepared by sol-gel process and dip-coating method. The effect of drawing speed on properties of the SiO2 film was studied. The transmittance was tested by light spectrum transmittance testing system, the thickness and refractive index of SiO2 film was tested by spectroscopic ellipsometer. With increasing of the drawing speed from 100mm/min to 300 mm/min, the average of transmittance increment at first increased and then decreased, which reached the maximum 4.24% at the speed 150mm/min The relations among transmittance, thickness(d) and refractive index(n) of the SiO2 film was dicussed.