Lens Assembly for LED Angular CCT Uniformity

The lighting device segments the optical path into distinct functional zones: an LED array section emitting light at different angles, a light mixing section with diffusing elements, and a collimating lens section. This segmentation allows light from multiple LEDs to be spatially separated and then remixed, breaking the direct angular-correlated-color-temperature relationship and achieving uniform color temperature across the emission pattern.

Different regions of the light mixing section are designed with locally optimized properties - some areas use diffusing materials to scatter light, while other areas use reflective surfaces to redirect light paths. This local quality variation ensures that light from different angles undergoes different transformations, ultimately converging to produce uniform color temperature across the entire emission pattern.

The patent merges multiple optical functions into a single integrated lens assembly that simultaneously performs light collection, mixing, and collimating. Rather than using separate components for each function, the lens assembly combines these operations in one element, reducing overall device complexity while maintaining the ability to correct angular CCT deviation and achieve uniform color temperature.

The lens assembly is designed as a multi-functional optical element that performs multiple roles: it collects light from the LED array, mixes light from different angles through internal refraction and reflection, and collimates the mixed light for uniform emission. This universality reduces the total number of components needed while achieving the desired color temperature uniformity.