Waveguide Collimating Optic for Thin Low-Bulk Luminaires

The patent transitions from a traditional deep parabolic reflector design to a planar waveguide-based collimating optic. Instead of using a three-dimensional parabolic shape that requires significant depth, the invention uses a two-dimensional waveguide structure with patterned surfaces that achieve light collimation in a much thinner profile. The waveguide spreads light laterally across its surface and uses surface patterns to collimate the light as it exits, eliminating the need for deep optical paths.

The patent replaces the mechanical parabolic reflector system with an optical waveguide system. Instead of relying on a physically deep parabolic surface to redirect light rays, the invention uses total internal reflection within the waveguide and surface patterning to achieve collimation. This substitution of the mechanical collimation mechanism with an optical-based approach enables significant reduction in luminaire depth.

The patent uses the inherent optical properties of the waveguide material itself to achieve light reflection and collimation, rather than applying separate mirror coatings. The waveguide material's refractive index and total internal reflection characteristics provide the necessary optical functionality, making the system self-sufficient and eliminating the need for additional reflective coatings that would complicate recycling.

The invention uses a homogeneous waveguide structure made from a single material (such as PMMA or polycarbonate) that provides both structural support and optical functionality. This eliminates the need for multi-layer constructions with different materials, including mirror coatings, thereby simplifying the overall structure and enabling easier recycling of the luminaire components.

The patent merges the protective cover function with the waveguide structure itself. The waveguide optic serves dual purposes: it performs the light collimation function and simultaneously acts as the protective enclosure for the light source. By integrating these two separate functions into a single component, the invention eliminates the need for an additional protective cover, thereby reducing device complexity and bulk while maintaining component protection.

The waveguide structure is designed to perform multiple functions simultaneously: it guides and collimates light, protects the internal components from environmental damage, and provides the structural housing for the luminaire. This multi-functional design eliminates the need for separate protective covers and reduces the overall number of components required in the system.