动态载频干涉条纹的自动调零方法
By dynamically acquiring and analyzing the two-dimensional discrete Fourier transform of the interference fringes, the beam angle is automatically adjusted, solving the problems of low efficiency and insufficient precision of manual adjustment, and realizing efficient and accurate optical interference detection.
CN115900589BActive Publication Date: 2026-07-17SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
- Filing Date
- 2022-12-16
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
In existing optical interferometry, manually adjusting the interference fringes to zero fringes relies on operational experience, resulting in low detection efficiency and insufficient accuracy.
Method used
The system dynamically acquires interference fringes and analyzes them using two-dimensional discrete Fourier transform. It automatically adjusts the angle between the reference beam and the measurement beam and uses a motor for precise adjustment until a zero-fringe state is achieved.
Benefits of technology
It enables automatic adjustment of interference fringes, improving the intelligence, accuracy, and efficiency of detection, and reducing reliance on operational experience.
✦ Generated by Eureka AI based on patent content.
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Abstract
一种动态载频干涉条纹发自动调零方法，包括步骤1)调零前预处理；寻找最新采集的干涉条纹图的二维离散傅里叶变换频谱图中的零频位置；计算频谱图中正或负一级频谱位置跟零频位置之间的相对偏移量；根据相对偏离量分别计算在夹具的绝对偏摆和俯仰方向上调节的相对位移量，并控制相应电机进行调节；采集移动结束后的载频干涉条纹进行二维离散傅里叶变换；判断此时频谱图中是否满足零频状态即只剩零频或者当正或负一级频谱位置与零频位置偏差在误差允许范围内，直至达零条纹状态，调节结束。本发明具备更加智能、准确和高效的特点。
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