A phase membrane stack structure

By stacking phase films with opposite inherent birefringence properties along the thickness direction in AR/VR devices and keeping the fast and slow axes parallel, the problem of uneven phase difference during curved surface bonding is solved, thereby improving optical imaging quality and optimizing user experience.

CN224399628UActive Publication Date: 2026-06-23JIAXING UROPTICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIAXING UROPTICS CO LTD
Filing Date
2025-07-02
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In AR/VR devices, the uneven in-plane phase difference of the phase film during the curved surface bonding process leads to an increase in stray light, affecting image clarity and contrast, and limiting the development of lightweight and high-performance optical modules.

Method used

By superimposing a first phase film (positive birefringent material) and a second phase film (negative birefringent material) with opposite inherent birefringence properties along the thickness direction, and keeping the fast axis and slow axis parallel, the total phase difference change after superposition approaches zero, thus suppressing the saddle-shaped phase difference distribution.

Benefits of technology

Completely eliminates saddle-shaped phase difference distribution, improves optical imaging quality, reduces stray light, enhances image clarity and contrast, and optimizes user experience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of phase diaphragm superposition structures, comprising: first phase diaphragm, when in-plane phase difference increases along slow axis stretch, when in-plane phase difference decreases along fast axis stretch;Second phase diaphragm, when in-plane phase difference decreases along slow axis stretch, when in-plane phase difference increases along fast axis stretch;The first phase diaphragm and second phase diaphragm are superimposed along thickness direction, and first phase diaphragm and second phase diaphragm are parallel in fast axis direction and parallel in slow axis direction;The phase diaphragm superposition structure and its curved patch process can effectively inhibit the in-plane phase difference uneven problem of phase difference film in curved surface bonding process, improve optical imaging quality.
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