Optical Light Guide with Transverse Grooves for Homogeneous Illumination

The guide face is segmented into multiple hollows or bumps that act as independent light decoupling elements. Each microstructure segment captures and redirects light rays independently, creating multiple light concentration points that collectively improve overall light distribution homogeneity while maintaining manufacturing feasibility through standardized microstructure patterns.

The bottom of each hollow is transformed into a porous or rough surface structure that provides inherent light diffusion capability. This porous structure allows light rays to scatter in multiple directions as they pass through or reflect off the hollow bottoms, achieving effective light diffusion without requiring complex melting and cooling operations. The porous texture can be created through simpler manufacturing methods such as injection molding with textured cavities.

The hollows or bumps are arranged in asymmetric patterns or with varying geometries along the guide length rather than uniform symmetric repetition. This asymmetry disrupts the formation of regular mode patterns that cause brighter and darker bands. By introducing geometric variations in the microstructures, the light distribution becomes more uniform without requiring additional manufacturing steps to correct mode phenomena.

The hollows are designed with self-forming characteristics where the molding process itself creates the necessary light decoupling structures without requiring subsequent special treatment operations. The microstructures are integrated into the guide manufacturing process, allowing the plastic material to naturally form the hollow geometries during injection molding. This self-service approach achieves effective light decoupling while maintaining high production speeds and avoiding costly post-processing steps.