A new approach to roughness filtering is described using digital filters designed and simulated in a general purpose computer. The filters were used to process the digitized surface profiles and the performance is compared with that of available analogue filters.
An essential preliminary to numerical assessment of roughness is the elimination of waviness. The waviness is usually filtered using analog filters of the capacitance-resistance type. This paper deals with a digital technique to remove the waviness. FFT, one of the important tools of digital signal processing was used to filter surface profiles. This technique was…
This paper deals with the application of finite Fourier series to analyse the surface profiles. A good approximation could be obtained using only a fraction of the maximum number of harmonics. The criteria to fix the fraction is dealt with in detail and this will enable us to find out the optimal degree to which…
The principal developments in the stylus measurement of roughness texture are traced. The instrument problems which were encountered, particularly with regard to the requirements of transmission characteristics and reference lines, are outlined. The behaviour of the skid is given further consideration, and a distinction is drawn between the systematic error resulting from its application to…
Precise and accurate control of surface texture is increasingly important to product performance in advancing technology. Success depends upon personnel who have a thorough knowledge of the limitations of existing methodology as well as the broad perspective necessary to evaluate factors in terms of company goals. Credos for engineers, manufacturers and quality personnel are given…
A comprehensive bibliography of surface metrology, the numerical description and analysis of manufactured surfaces, improves access to research on topographic quantification that lies outside the usual Earth-science sources. A brief essay accompanying the 4800 literature citations introduces the field of industrial surface metrology to geomorphologists and other Earth scientists, describes similarities and differences between the…
Demo by an Engineer of Zygo Corporation
This playlist by Dr. Chris Brown covers roughness measurement, 3D texture, surface analysis, confocal microscopy, laser microscopy, optical microscopy, and confocal laser scanning microscopy.
Summary of research.
