Focus-tunable compound lens and folded optical system

By designing a focusing-adjustable compound lens that integrates diopter adjustment and optical path folding functions, the thickness problem of traditional near-eye display systems has been solved, achieving a thinner and lighter effect.

WO2026103251A1PCT designated stage Publication Date: 2026-05-21ZJU HANGZHOU GLOBAL SCI & TECH INNOVATION CENT +1
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
ZJU HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
Filing Date
2025-08-20
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

In traditional near-eye display systems, the diopter adjustment system and the folding optical system are usually independent, resulting in a thicker system structure that cannot meet the requirements for thinner and lighter designs.

Method used

Design a focusing composite lens that combines an incident lens layer, an electrode layer, a nematic liquid crystal layer, and a selective reflection component. It achieves diopter adjustment and optical path folding through electronically controlled focusing and selective reflection of polarized light, all integrated into a single composite lens.

Benefits of technology

While reducing the optical thickness, diopter adjustment and optical path folding were achieved, meeting the requirements for thinner and lighter near-eye display systems.

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Abstract

A focus-tunable compound lens and a folded optical system. The focus-tunable compound lens comprises: a light-incident lens layer; a first electrode layer, which is located on a light-emergent side of the light-incident lens layer and is used for applying a first voltage; a second electrode layer, which is located on the side of the first electrode layer that is away from the light-incident lens layer, and is used for applying a second voltage that is different from the first voltage, so as to form an electric field between the first electrode layer and the second electrode layer; a nematic liquid crystal layer, which is arranged in the electric field between the first electrode layer and the second electrode layer; and a selective reflection assembly, which is stacked on the light-emergent side of the light-incident lens layer, and is used for selectively reflecting one type of polarized light and selectively transmitting another type of polarized light.
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