Characterization of pavement texture by use of surface profiles

2021 ◽  
Keyword(s):  
Surface Profiles

Optical Characterization of Surface Profiles of Various Si1-xGex/Si Wafers Before and After Annealing Step

2019 ◽  
Vol 28 (1) ◽  
pp. 261-268
Author(s):  
Woo Sik Yoo ◽  
Takeshi Ueda ◽  
Toshikazu Ishigaki ◽  
Kitaek Kang
Keyword(s):  
Optical Characterization ◽  
Annealing Step ◽  
Before And After ◽  
Surface Profiles

Fabrication and Characterization of 3D Aspheric Microlenses with Arbitrary Surface Profiles Based on a Novel Excimer Laser Contour Scanning Method

2006 ◽  
Vol 505-507 ◽  
pp. 67-72
Author(s):  
Yung Chun Lee ◽  
Chun Ying Wu
Keyword(s):  
Excimer Laser ◽  
Surface Profile ◽  
Aspheric Surfaces ◽  
Scanning Method ◽  
System A ◽  
Continuous Surface ◽  
Surface Profiles ◽  
Profile Accuracy ◽  
Method Show

This paper presents a new method for fabricating 3D microstructures with an excimer laser micromachining system. A novel mask contour scanning method is developed for obtaining precise 3D microstructures with pre-described continuous surface profile. Two different microlenses with spherical and aspheric surfaces profiles with dimension less than 200 μm are fabricated on polycarbonate (PC) samples. The surface profiles are measured and compared with their theoretical counterparts. Excellent agreements both in profile shapes and dimensions are achieved. The surface roughness (Ra) of the machined surfaces is also measured and is less than 10 nm. The machining profile accuracy and surface smoothness of this proposed micromachining method show great potentials in fabricating micro-optic components such as aspheric microlenses or microlens arrays.

Functional Filtering and Performance Correlation of Plateau Honed Surface Profiles

2005 ◽  
Vol 127 (1) ◽  
pp. 193-197 ◽  
Author(s):  
B. Muralikrishnan ◽  
J. Raja
Keyword(s):  
Surface Characterization ◽  
Cylinder Liner ◽  
Core Layer ◽  
Complex Nature ◽  
Morphological Filters ◽  
Effect Model ◽  
Liner Surface ◽  
Surface Profiles ◽  
And Performance

Plateau honing produces a unique texture on cylinder liner surface. This surface is engineered to simulate the actual running in process of the engine and results in a core layer superimposed on valleys. Because of the complex nature of the surface, characterization of such surfaces is very different from traditional surface texture analysis. Different filtering techniques have been employed to remove waviness from these profiles. Parameters are subsequently computed from the bearing area curve of the roughness profile. With recent progress in filtering of surface profiles, we propose a functional analysis approach based on morphological filters. The advantage of this technique is the clear separation of the core texture from the valleys resulting in better correlation with process and functional measures. A number of profiles are collected from two sets of liners with different performance characteristics. A cause effect model is built and used for performance prediction.

scholarly journals Surface characterization of ICF capsule by AFM-based profilometer

2017 ◽  
Vol 5 ◽  
Author(s):  
Jie Meng ◽  
Xuesen Zhao ◽  
Xing Tang ◽  
Yihao Xia ◽  
Xiaojun Ma ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Surface Characterization ◽  
Power Spectra ◽  
Inertial Confinement ◽  
Complete Coverage ◽  
Atomic Force ◽  
Surface Fluctuations ◽  
Confinement Fusion ◽  
Surface Profiles

Outside surface fluctuations of inertial confinement fusion (ICF) capsule greatly affect the implosion performance. An atomic force microscope (AFM)-based profilometer is developed to precisely characterize the capsule surface with nanometer resolution. With the standard nine surface profiles and the complete coverage data, 1D and 2D power spectra are obtained to quantitatively qualify the capsule. Capsule center fast aligning, orbit traces automatic recording, 3D capsule orientation have been studied to improve the accuracy and efficiency of the profilometer.

Profile Characterization of Manufactured Surfaces Using Random Function Excursion Technique, Part 2: Application

1975 ◽  
Vol 97 (1) ◽  
pp. 196-202 ◽  
Author(s):  
M. O. M. Osman ◽  
T. S. Sankar
Keyword(s):  
Machined Surface ◽  
Pass Filter ◽  
Measuring Device ◽  
Surface Parameters ◽  
Actual Surface ◽  
Surface Measurements ◽  
On Line ◽  
Surface Profiles ◽  
High Pass

In Part 1 of this paper an analytical procedure based on the theory of random excursions was described to characterize the texture of a machined surface in terms of four new parameters. In this part a number of experimental results are presented to justify the validity of the proposed surface parameters. Surface measurements were carried out on ten differently machined surfaces using a specially equipped measuring device with a direct cable link to a hybrid computer. The theoretically computed surface parameters compare favorably with the measurements made on the actual surface profiles that were recorded experimentally. One of the advantages of the surface parameters presented in this paper is that they correspond directly to the mechanical properties of the machined component and hence can be used readily in specifications. Further, the results of this paper show that i) the sampling length is essentially a high-pass filter with geometrically defined characteristics, and ii) the crest and valley excursion parameters are adaptable for both “on-line” and “off-line” surface evaluation. The method presented is well-suited for application to computer-aided manufacturing without any special modifications. Based on this investigation, a proposal for a mechanical stylus system for “online” surface measurements is also made.

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