The effective region of Antiveiling Photoelectric Glass (AVG) has high transmittance for ultraviolet, visible and near-infrared light. At the same time, a high-efficiency light absorption layer can be generated from the substrate outside the effective region to eliminate stray light and improve the clarity of optical imaging. It is widely used in the fields of low-light night vision and space optical imaging. However, the spangle in AVG will affect its optical properties and reduce the transmittance and optical uniformity of the glass. In this paper, AVG was prepared by platinum crucible, and the morphology and size of spangle in AVG were observed by scanning electron microscope (SEM). The surface of the glass substrate containing the spangle was sprayed with carbon. The composition of the spangle and the glass substrate was analyzed by Energy Dispersive Spectroscopy (EDS) energy spectrum. The results showed that the main component of the spangle was Pt element. The valence state of platinum in the spangle was analyzed by X-ray photoelectron spectroscopy (XPS). The results showed that the Pt element in the spangle was mainly in the form of 0 valence and +2 valence. The mechanism and preventive measures of AVG platinum spangle were proposed.

Keywords: Anti vignettiong glass, Spangle, Platinum, Mechanization.