Diffraktive Optische Struktur und Augennahe Anzeigevorrichtung

Details

Veröffentlichungs-Nr.

EP4729994

Anmeldetag

10. September 2025

Veröffentlichung

22. April 2026

Rechtsraum

EP

Abstract

The present disclosure provides a diffractive optical structure and a near-eye display device. The diffractive optical structure includes a substrate (3) and an in-coupling region (1) and an out-coupling region (2) provided on the substrate (3). The out-coupling region (2) includes a grating structure that includes a plurality of periodically arranged grating ridges (201) and grating grooves (202) between adjacent grating ridges (201), and the grating grooves contain at least two materials having different refractive indices. An average refractive index n of the different materials within one grating unit period of the grating structure satisfies 1.1<n≤2.4, where n ¯ = ∑ i = 1 m n m ∗ V m V unitcell <img class="EMIRef" id="0a4fa548-56da-4d9c-9587-6890afb0a2d5-ia01" /> , V1, ..., Vm are respectively the volumes or areas of the first to the m-th material, n1, ..., nm are the refractive indices of the first to the m-th material, and Vunitcell is the volume or area of one grating unit period.

Anmelder

Firma

Goertek Optical Technology Co., Ltd.

Land

🇨🇳 China