Acoustic Microscopy of Curved Surfaces
Acoustic Microscopy of Curved Surfaces
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曲面的声学显微镜
DOI：
10.1063/1.92436
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发表时间：
1981
影响因子：
4
通讯作者：
R. D. Weglein
中科院分区：
文献类型：
--
作者：
R. D. Weglein
到目前为止，成像和计量的声学显微镜已被执行专门的平面标本。虽然成像是通过在横向于声束轴的平面内进行光栅扫描来实现的，但计量是通过试样-透镜间距沿着声束轴的变化来实现的。该操作在样品平面上的单个位置处产生声学材料签名。当扫描已知曲率的非平面表面时，实际上同时采用这两种操作模式。如果表面是球形的，则所得到的图像显示具有径向周期性亮度变化的同心环。该技术是用精密陀螺仪中使用的不锈钢轴承球来演示的。讨论了该技术在轴承滚珠和滚道诊断检测和分析中的应用。建议获得的图像代表支承面区域弹性特性的二维地图。
To date, imaging and metrology in the acoustic microscope have been performed exclusively on planar specimens. While imaging is accomplished by raster scanning in the plane transverse to the axis of the acoustic beam, metrology is practiced by variation of the specimen‐lens separation along the beam axis. This operation yields an acoutic material signature at a single location on the specimen plane. The two modes of operation are in effect simultaneously employed when a nonplanar surface of known curvature is scanned. The resulting images reveal concentric rings with radial periodic brightness variation if the surface is spherical in shape. The technique is demonstrated with stainless‐steel bearing balls of the type used in precision gyros. The application of this technique to the diagnostic inspection and analysis of both bearing balls and raceways are discussed. It is suggested that the obtained images represent a two‐dimensional map of elastic properties of the bearing surface regions.