The working principle of outdoor shading ring
The light-shielding ring plays a role of light-shielding, such as the light-shielding ring of the mobile phone lens and the light-shielding ring of the camera lens., a piece of mylar inlaid in the lens. Because of the light-shielding effect, everyone calls it the light-shielding ring and the light-shielding gasket.
Its principle is based on the principle of physical phenomenon (small hole imaging), and the processing requirements are relatively strict. Therefore, the requirements for materials are also higher-level requirements.
Through independent research and development technology, the light-shielding ring is subjected to special matting treatment, which has good electrical conductivity, opacity, double-sided matte, precision, and good mechanical performance. Because the material is brass, it is more flexible in processing (can produce bell mouth type, step type, etc.), High temperature resistance. Secondary film formation, the film layer has a deeper blackness, which can be widely used in optical matting parts. The blackening film has good adhesion, corrosion resistance and abrasion resistance. It is suitable for the preparation of high-quality blackened films on various copper and copper alloy parts. It does not produce harmful gases, the blackening liquid is close to neutral and non-corrosive. It does not contain heavy metals and toxic selenium substances.