Sigma optical protection window glass

▶ Due to the lack of coating on the protective glass, there is surface reflection loss, resulting in a transmittance of about 90%.
▶ We also undertake the manufacturing of protective glass with specific wavelength anti reflection films deposited by evaporation. (1 start)
▶ When the protective glass becomes dirty and the transmittance decreases, please replace it with a new one. (Consumables)