Lens Assembly Light-Blocking Membrane Stray Light Control

The light-blocking membrane layer is segmented into multiple independent light-blocking structures (first light-blocking structure, second light-blocking structure, third light-blocking structure) with different positions and shapes. Each structure independently blocks light in specific regions, enabling precise control over light-blocking range while maintaining effective stray light elimination. This segmentation allows the membrane layer to selectively block stray light without excessively blocking useful light.

Different regions of the light-blocking membrane layer are designed with different local characteristics: the first light-blocking structure has a specific shape and position for blocking certain stray light, the second light-blocking structure has different characteristics for another region, and the third light-blocking structure provides additional localized blocking. This local quality differentiation enables precise control of light-blocking range in different areas while maintaining overall optical quality.

By dividing the light-blocking function into multiple separate structures rather than a single continuous layer, the patent enables selective blocking of only the necessary stray light regions. The segmented structures are positioned and shaped to target specific stray light sources while leaving pathways open for useful light, thereby reducing overall light loss while maintaining optical quality improvement.

The light-blocking membrane layer applies partial blocking action rather than complete blocking. Each light-blocking structure is designed to block only the specific stray light it targets, not all incident light. This partial action approach ensures that useful light is not excessively blocked while still achieving the goal of stray light elimination and optical quality improvement.