Optical Module for Head Mount Display Using Folded Polarization Path

The patent applies dimensional change by transitioning from a conventional linear optical path to a folded optical path using reflective surfaces. The light path is directed through multiple reflections at angles, effectively utilizing spatial dimension to achieve a longer optical path within a compact thickness, thus resolving the contradiction between image quality and device thickness

The patent employs nesting by integrating multiple optical elements (lenses, reflective surfaces, quarter-wave plates) into a compact stacked arrangement. The optical components are nested within each other in the thickness direction, allowing the long required optical path to be contained within a thin overall structure, thereby reducing HMD bulk while maintaining imaging quality

The patent applies multi-functionality by designing the second lens to serve multiple purposes: it acts as both a focusing element for image magnification and a reflective element to redirect light at specific angles. This multi-functional design reduces the total number of separate components needed, thereby reducing device complexity while maintaining or improving magnification performance

The patent merges the functions of multiple optical elements by combining lenses and reflective surfaces into an integrated optical path. The first and second lenses are positioned and oriented to work together with the reflective surfaces, creating a unified optical system that achieves both magnification and path folding without requiring separate dedicated components for each function