高空间分辨率的背景纹影光学测量系统及测量方法
By using concave mirrors and random scattered patterns in background schlieren technology, combined with displacement prediction methods, the problem of reduced spatial resolution in traditional background schlieren technology is solved, and high spatial resolution flow field measurement is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANMUSHAN LABORATORY
- Filing Date
- 2023-12-21
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional background schlieren technology suffers from reduced spatial resolution when the flow field under test is out of focus, making it impossible to simultaneously focus the experimental area and the background plate.
A concave reflector with a random scattered pattern is used. The point light source and camera are set at twice the focal length of the optical axis of the concave reflector. The scattered pattern of the flow field to be measured on the concave reflector is acquired by the image acquisition system, and the refractive index gradient is calculated by combining the displacement prediction method.
It improves the spatial resolution of background schlieren measurement, avoids light divergence problems, and enhances the imaging clarity of the flow field under test.
Smart Images
Figure CN117907281B_ABST