一种基于LED正弦点阵图案与两级光扩展的高速条纹屏
By using a high-speed stripe screen based on LED sinusoidal dot matrix patterns and two-level light extension, the problem of frame rate limitation in commercial TFT-LCD projection has been solved, achieving high frame rate and high precision phase-shifted sinusoidal stripe display. This breaks through the detection speed bottleneck of phase measurement deflection technology and has ultra-high-speed detection capability.
CN118173021BActive Publication Date: 2026-07-17UNIV OF ELECTRONICS SCI & TECH OF CHINA
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UNIV OF ELECTRONICS SCI & TECH OF CHINA
- Filing Date
- 2024-03-11
- Publication Date
- 2026-07-17
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Figure CN118173021B_ABST
Abstract
本发明属于3D检测技术领域，涉及相位测量偏折术，具体提供一种基于LED正弦点阵图案与两级光扩展的高速条纹屏，用以实现高帧率、高精度的相移正弦条纹显示，进而结合相位测量偏折术实现光滑表面缺陷和面形快速检测。本发明包括：PCB电路板1、LED芯片阵列2、光隔离架3、横向光栅4、纵向光栅5及散光膜6，LED芯片阵列安装于PCB电路板上构成LED发光阵列，光隔离架与正交光栅构成一级光扩展组件，散光膜作为二级光扩展组件；LED发光阵列通过亮度控制实现连续正弦图案离散取值，显示横向、纵向正弦点阵图案，经过两级光扩展后获取高精度的正弦条纹显示；并且，本发明能够实现高达1MHz的条纹切换帧率，具备超高速检测的应用潜力。
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