光学
校准
针孔(光学)
反射器(摄影)
失真(音乐)
抛物面反射器
摄像机切除
光圈(计算机存储器)
焦距
针孔相机模型
几何光学
物理
镜头(地质)
摄像机自动校准
计算机科学
人工智能
光电子学
声学
光源
放大器
量子力学
CMOS芯片
作者
Shanshan Wang,Yinlong Hou,Xin Liu,Qun Hao
出处
期刊:Applied Optics
[The Optical Society]
日期:2022-01-28
卷期号:61 (4): 1001-1001
摘要
Careful calibration of system geometric position and camera errors is crucial to achieve high testing accuracy for large-scale aspherical surfaces. We propose a geometrical optical calibration method for increasing the overall accuracy of a large-scale reverse Hartmann test system to realize the parabolic reflector measurement. By using a flat crystal, a mask with uniform holes and an external pinhole aperture in front of the camera, camera lens distortions and keystone distortion, as well as system geometry correspondence between LCD screen, camera, and reflecting point on the test surface, are determined accurately. We experimentally demonstrated that the proposed calibration method achieves high slope detection accuracy for a large-scale parabolic reflector: tens of microradians within 1620(H)×850(V)mm2.
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