Lens Assembly Gap Structure for Uniform LED Color Temperature

The lighting device is segmented into distinct functional components: the LED light source, the lens assembly with separate optical elements, and the elastomer encapsulation. This segmentation allows each component to be optimized independently - the lens assembly handles light redirection while the elastomer provides color mixing, resolving the contradiction between broad spectrum illumination and color temperature uniformity

The elastomer acts as an intermediary medium between the LED light source and the external environment. It receives light with angular CCT deviation and transforms it through scattering and mixing processes, converting the non-uniform light into uniformly mixed light that maintains broad spectrum characteristics while achieving color temperature uniformity

The elastomer is extracted from direct contact with the lens by introducing a gap between them. This separation removes the constraint of refractive index matching that would occur with direct contact, allowing the elastomer to perform its light mixing function more effectively while the lens maintains its light redirection function

The gap between the lens and elastomer creates an optical feedback path where light can be redirected by the lens, then scattered and mixed by the elastomer, and potentially reflected back into the lens. This feedback loop enhances the light mixing process and improves color temperature uniformity without requiring the elastomer to be in direct contact with the lens