GB/T 37831-2019 is a national standard for the optical performance testing of aviation glass. It applies to single-layer or laminated organic and inorganic aviation transparent components, specifying test methods for core indicators such as haze, transmittance, optical distortion, optical angular deviation, and binocular parallax, while clarifying the corresponding environmental conditions required for testing. This standard provides the basis for the unified testing of the optical performance of aviation glass, which is directly related to flight safety and visual clarity. Relevant testing instruments include haze meters that meet the requirements (equipped with CIE standard C light sources and integrating sphere optical systems), DSLR cameras with a pixel count of no less than 20 million, grid target plates, paired with high-precision sample holders and lighting equipment to ensure testing accuracy.