#4846 Etched Glass Stack
#4846 Etched Glass Stack #4846 Concept: Stack of etched glass lenses to direct light in a desired pattern for a desired purpose A stack of planar, etched glass elements functioning in series operates by breaking continuous wave propagation into discrete phase-delay transformations. Rather than relying on bulky curved bulk optics, each layer introduces spatially localized changes in phase, amplitude, or optical path length, allowing incoming wavefronts to be steered, split, or computed upon at the speed of light. Core Physical Mechanisms When chaining etched glass layers, three distinct physical regimes govern how light is routed: Multi-Plane Diffractive Optical Networks (Free-Space Cascades): Each layer consists of sub-wavelength or multi-level phase steps etched into fused silica or borosilicate glass. As light passes through Layer N , it acquires a spatially varying phase shift Delta phi(x, y) = {2\pi} / {lambda} (n_glass - n_air) d(x, y) , where d(x, y) is the local etch ...
