Three-dimensional surface measurement by amplified off-axis digital holography

2013 ◽  
Author(s):  
Wu You ◽  
Xiaojun Liu ◽  
Wenlong Lu ◽  
Liping Zhou
Keyword(s):  
Digital Holography ◽  
Three Dimensional ◽  
Surface Measurement ◽  
Dimensional Surface

The Three-Dimensional Surface Topographic Characterisation of Diamond Grinding Wheels

2010 ◽  
Vol 126-128 ◽  
pp. 690-695
Author(s):  
David Lee Butler
Keyword(s):  
Measurement Techniques ◽  
Three Dimensional ◽  
Surface Measurement ◽  
Grinding Wheel ◽  
Profile Measurement ◽  
Detailed Knowledge ◽  
Grinding Wheels ◽  
Diamond Grinding ◽  
Insight Into ◽  
Dimensional Surface

Surface measurement using three-dimensional stylus instruments is a relatively new technique that offers numerous advantages over more traditional profilometry methods. The information generated is, unlike profile measurement, less subjective and more statistical providing additional insight into the surface structure. One application of surface measurement that has encountered problems when using the profilometry method is that of grinding wheel characterisation. The wheel surface texture (topography) and the conditions under which it is generated have a profound effect upon the grinding performance as characterised by the grinding forces, power consumption, temperature, and surface integrity of components. A detailed knowledge of the nature of the topography of the grinding wheel would provide further insight into surface interactions between the wheel and workpiece as well as enabling improved control of the grinding process in general. In this paper four diamond grinding wheels of 91 and 181 micron grit size were subjected to differing dressing conditions to produce varying final wheel topographies. Three-dimensional surface measurement techniques were employed to quantitatively characterise the topographic change and provide an aerial estimation of the number of cutting grains. The results demonstrate that the techniques can distinguish between a worn and dressed wheel. In addition, the parametric values generated from the various surfaces can aid the user in determining when re-dressing is required.

Three-dimensional surface measurement using grating projection method by detecting phase and contrast

1999 ◽  
Author(s):  
Mitsuhiro Ishihara ◽  
Yasuo Nakazato ◽  
Hiromi Sasaki ◽  
Masahito Tonooka ◽  
Masayuki Yamamoto ◽  
...  
Keyword(s):  
Projection Method ◽  
Three Dimensional ◽  
Surface Measurement ◽  
Dimensional Surface
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