Nowadays, the popularity of intelligent devices such as security monitoring, industrial inspection, and service robots is accelerating. Optical dome covers are no longer just simple protective shells, but key optical components that directly affect the perception effect of devices. 

The hemispherical cover has a large curvature hyperbolic structure, and the path of light penetration is more complex than that of ordinary flat lenses. In practical use, the flatness of the product's surface, the uniformity of light transmission, and the regularity of the molding will directly affect the imaging quality and detection accuracy of the camera and sensor. 

During the production process, the purity of raw materials, forming patterns, and small surface defects can all cause uneven light transmission. For high-precision intelligent sensing devices, even slight optical deviations can lead to imaging blur, recognition bias, and unstable detection over long-term use. 

With the increasing demand for large-scale production in the industry, how to maintain consistency in the surface state, light transmission effect, and optical stability of each batch of hemispherical covers, and reduce performance differences between individual products, has become the most core optical challenge in the mass production stage of the industry.