Ocular Optical System With Cemented Diffractive Lens

The patent combines multiple optical functions into a single integrated optical system. The Fresnel lens, diffractive optical element, and aspherical lens surfaces are merged into one ocular optical system, allowing wide viewing angle, aberration correction, and low profile to be achieved simultaneously without requiring separate optical components for each function.

The optical system employs multi-functional elements: the Fresnel lens provides both focusing and wide-angle viewing capabilities, the diffractive optical element simultaneously corrects chromatic aberration and extends viewing angle, and aspherical surfaces address multiple aberration types. This multi-functionality resolves the contradiction by achieving diverse optical performance without proportionally increasing structural complexity.

The patent changes the physical parameters of the optical elements, specifically using Fresnel lens geometry and aspherical surfaces, to achieve aberration correction in a compact form. These parameter changes allow the optical system to maintain low profile and weight while still providing effective aberration correction through the modified optical paths and surface geometries.

The optical system uses composite optical design combining refractive elements (Fresnel lens, aspherical lenses) and diffractive elements in a single integrated structure. This composite approach enables aberration correction functionality to be achieved within a low-profile form factor, as the different optical mechanisms work together to correct various aberration types without requiring additional space.

The patent merges multiple aberration correction mechanisms into a single integrated optical element. Instead of using separate lens groups for spherical aberration, chromatic aberration, and astigmatism correction, the invention combines these functions into one ocular optical system with Fresnel lens, diffractive element, and aspherical surfaces, thereby reducing manufacturing complexity while maintaining correction effectiveness.

The diffractive optical element and aspherical surfaces serve multiple correction functions simultaneously. The diffractive element corrects both chromatic and spherical aberrations, while the aspherical surfaces address astigmatism and other off-axis aberrations. This multi-functionality reduces the number of separate components needed, simplifying manufacturing while achieving comprehensive aberration correction.