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公开(公告)号:US20170038199A1
公开(公告)日:2017-02-09
申请号:US14820640
申请日:2015-08-07
Applicant: General Electric Company
Inventor: Kevin George Harding , Joseph Benjamin Ross , Esmaeil Heidari
IPC: G01B11/27 , G01N21/956
CPC classification number: G01B11/272 , G01B11/254 , G01N21/95607
Abstract: A method involves receiving a test image of at least a portion of a test object which includes a test moiré pattern generated by superposing one or more reference gratings on one or more subject gratings. The method further involves analyzing one or more test beat lines in the test moiré pattern and calculating one or more test values based on the analysis of the one or more test beat lines. The one or more test values are a function of one or more rotational angles corresponding to the one or more subject gratings and a shape of at least the portion of the test object. The method also involves calculating one or more angular errors of the one or more subject gratings based on the one or more test values and one or more template values and sending a notification based on the one or more angular errors.
Abstract translation: 一种方法包括接收测试对象的至少一部分的测试图像,该测试对象包括通过将一个或多个参考光栅叠加在一个或多个对象光栅上而产生的测试莫尔图案。 该方法进一步包括分析测试波纹图案中的一个或多个测试节拍线,并且基于对一个或多个测试节拍线的分析来计算一个或多个测试值。 一个或多个测试值是对应于一个或多个对象光栅的一个或多个旋转角度和至少部分测试对象的形状的函数。 该方法还包括基于一个或多个测试值和一个或多个模板值来计算一个或多个对象光栅的一个或多个角度误差,并基于一个或多个角度误差发送通知。
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公开(公告)号:US09587933B2
公开(公告)日:2017-03-07
申请号:US14820640
申请日:2015-08-07
Applicant: General Electric Company
Inventor: Kevin George Harding , Joseph Benjamin Ross , Esmaeil Heidari
IPC: G01B11/26 , G01B11/27 , G01N21/956
CPC classification number: G01B11/272 , G01B11/254 , G01N21/95607
Abstract: A method involves receiving a test image of at least a portion of a test object which includes a test moiré pattern generated by superposing one or more reference gratings on one or more subject gratings. The method further involves analyzing one or more test beat lines in the test moiré pattern and calculating one or more test values based on the analysis of the one or more test beat lines. The one or more test values are a function of one or more rotational angles corresponding to the one or more subject gratings and a shape of at least the portion of the test object. The method also involves calculating one or more angular errors of the one or more subject gratings based on the one or more test values and one or more template values and sending a notification based on the one or more angular errors.
Abstract translation: 一种方法包括接收测试对象的至少一部分的测试图像,该测试对象包括通过将一个或多个参考光栅叠加在一个或多个对象光栅上而产生的测试莫尔图案。 该方法进一步包括分析测试波纹图案中的一个或多个测试节拍线,并且基于对一个或多个测试节拍线的分析来计算一个或多个测试值。 一个或多个测试值是对应于一个或多个对象光栅的一个或多个旋转角度和至少部分测试对象的形状的函数。 该方法还包括基于一个或多个测试值和一个或多个模板值来计算一个或多个对象光栅的一个或多个角度误差,并基于一个或多个角度误差发送通知。
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