Conductive Operation Ring for Accurate Lens Rotation Detection

The light blocking function is merged with the operation ring itself by forming light blocking surfaces directly on the inner surface of the operation ring. This eliminates the need for separate light blocking members, preventing tilting or detachment issues while maintaining detection accuracy. The operation ring now serves dual purposes: user operation and light blocking for detection.

The operation ring is given multiple functions: it serves as both the operational component that the user rotates and as the light blocking structure for the detection system. By integrating these functions into a single component, the patent eliminates the reliability issues associated with separate light blocking members while maintaining structural simplicity.

The operation ring is constructed using a composite structure combining a resin base material with a conductive coating layer. The resin provides the non-glossy light blocking surfaces, while the conductive coating (such as ITO - indium tin oxide) provides static electricity removal functionality. This composite approach allows both light blocking and electrostatic protection to coexist in the same component.

The surface properties of the operation ring are modified by applying a conductive coating that changes the electrical parameters of the material. This coating provides pathways for static electricity dissipation while maintaining the optical properties (non-glossy appearance) needed for light blocking. The conductive coating transforms the electrical characteristics without compromising the optical function.

The operation ring uses a composite structure with a resin base material and a conductive coating layer. The conductive coating (such as ITO) provides both the glossy reflective surface for improved light detection accuracy and simultaneous static electricity dissipation. This dual-function coating resolves the contradiction between optical performance and electrostatic protection.

The conductive coating modifies the electrical parameters of the operation ring surface, providing a pathway for static electricity to dissipate. Simultaneously, the coating maintains or enhances the optical reflectivity needed for accurate detection. The material parameters are engineered to satisfy both optical and electrical requirements.