用于增强现实显示器的光学装置
By using an array of grating elements with an irregular grating structure in an augmented reality display, the problems of difficult and costly manufacturing of input gratings have been solved, achieving more efficient optical coupling and improved image brightness.
CN115735080BActive Publication Date: 2026-07-17SNAP INC
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SNAP INC
- Filing Date
- 2021-06-29
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
The input gratings in existing augmented reality displays are difficult and costly to manufacture, and it is difficult to efficiently couple light into the waveguide and orient it toward the output grating, which affects image brightness.
Method used
An irregular grating structure defined by repeating unit cells is used to generate an asymmetric diffraction response by varying the height, width, spacing, and shape of the grating elements. A structured grating element array is used to facilitate manufacturing and reduce costs.
Benefits of technology
This enables more efficient coupling of light into waveguides and orientation toward the output grating in augmented reality displays, improving image brightness and reducing manufacturing difficulty and cost.
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Figure CN115735080B_ABST
Abstract
提供了用于控制增强现实显示器中的光的光学装置。光学装置包括波导和被配置成将光耦合到波导中的衍射光学元件。衍射光学元件包括结构化光栅元件的阵列，结构化光栅元件基于重复的单位单元布置，其中，每个单位单元包括限定不规则光栅结构的至少两个光栅元件，所述不规则光栅结构使得衍射光学元件产生不对称衍射响应。还提供了制造光学装置的方法。
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