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Diamond machining of freeform-patterned surfaces on precision rollers (2019)
Journal Article
Liu, M., Cheung, C. F., Feng, X., & Wang, C. (2019). Diamond machining of freeform-patterned surfaces on precision rollers. International Journal of Advanced Manufacturing Technology, 103(9-12), 4423-4431. https://doi.org/10.1007/s00170-019-03628-y

Rapid development of freeform surfaces faces the challenges of not only higher form accuracy and smoother surface finishing, but also high machining efficiency and lower manufacturing cost. Combining diamond turning and roll-to-roll embossing technol... Read More about Diamond machining of freeform-patterned surfaces on precision rollers.

Optical measurement of surface topographies with transparent coatings (2019)
Journal Article
Feng, X., Senin, N., Su, R., Ramasamy, S., & Leach, R. (2019). Optical measurement of surface topographies with transparent coatings. Optics and Lasers in Engineering, 121, 261-270. https://doi.org/10.1016/j.optlaseng.2019.04.018

Manufacturers nowadays have access to state-of-the-art areal surface topography measurement instruments that allow investigation of surface topography at unprecedented levels of detail and over a wide range of scales. However, high value-added produc... Read More about Optical measurement of surface topographies with transparent coatings.

Residual flatness and scale calibration for a point autofocus surface topography measuring instrument (2019)
Journal Article
Maculotti, G., Feng, X., Su, R., Galetto, M., & Leach, R. K. (2019). Residual flatness and scale calibration for a point autofocus surface topography measuring instrument. Measurement Science and Technology, 30(7), https://doi.org/10.1088/1361-6501/ab188f

Point autofocus instruments are often used for measuring the surface topography of objects with complex geometry. Determining the metrological characteristics of the instrument is key to ensuring a traceable areal surface topography measurement. In t... Read More about Residual flatness and scale calibration for a point autofocus surface topography measuring instrument.

All-optical difference engine for in-process defect inspection for roll-to-roll printed electronics (2019)
Journal Article
Feng, X., Su, R., Happonen, T., Liu, J., & Leach, R. (2019). All-optical difference engine for in-process defect inspection for roll-to-roll printed electronics. Proceedings of SPIE, 11053, https://doi.org/10.1117/12.2511140

© 2019 SPIE. The increasing capabilities of roll-to-roll (R2R) printing processes present challenges for quality control, requiring inprocess inspection of large substrates with high resolution at high speed. In this paper, an all-optical difference... Read More about All-optical difference engine for in-process defect inspection for roll-to-roll printed electronics.

Gaussian process machine learning-based surface extrapolation method for improvement of the edge effect in surface filtering (2019)
Journal Article
Liu, M. Y., Cheung, C. F., Feng, X., Ho, L. T., & Yang, S. M. (2019). Gaussian process machine learning-based surface extrapolation method for improvement of the edge effect in surface filtering. Measurement, 137, 214-224. https://doi.org/10.1016/j.measurement.2019.01.048

Filtering for signal and data is an important technology to reduce and/or remove noise signal for further extraction of desired information. However, it is well known that significant distortions may occur in the boundary areas of the filtered data b... Read More about Gaussian process machine learning-based surface extrapolation method for improvement of the edge effect in surface filtering.