Image Lens Element Stripe Structure for Stray Light Control

The patent applies local quality by creating different surface characteristics in different regions of the lens element. The outer peripheral surface has a roughened surface treatment in specific regions to control stray light, while maintaining smooth surfaces in optical regions. This localized treatment allows stray light control without affecting overall lens performance or requiring complete redesign of the entire lens structure.

The patent employs asymmetry by designing non-symmetric stripe structures and uneven surface roughness distributions on the lens element. The roughened surfaces are concentrated in specific asymmetric patterns rather than uniformly distributed, creating directional control of stray light while maintaining manufacturing feasibility through non-axisymmetric processing techniques.

The patent applies preliminary action by incorporating the stripe structures and roughened surface treatments directly into the lens molding process rather than adding them as separate post-processing steps. The mold design includes built-in features that create the desired surface characteristics during injection molding, eliminating the need for complex subsequent machining or coating operations.

The patent replaces complex mechanical machining operations with injection molding technology to create the stripe structures and surface roughness patterns. By using mold-based formation during injection molding, the complex geometric features are created in a single manufacturing step without requiring multiple precision machining operations or manual interventions.