Surface roughness is studied experimentally by making use of the statistical properties of dichromatic speckle patterns. The rms intensity difference between two speckle patterns produced by two argon laser lines are analyzed in the far field as functions of the object surface roughness and the difference in the two wavenumbers of the illuminating light. By applying previously derived formulas,...

We outline a method of assessing the roughness of the bed beneath ice-masses, applicable to data collected in a wide variety of (glaciated) environments. Roughness at scales 410m in particular is poorly constrained and understood in glaciated systems, and regional geophysical surveys collected over the past 30 years are ideally suited to addressing this issue. We demonstrate the technique using...

Measurement and control of surface roughness are important in many fields, such as magnetic media, semiconductor processing and optics. Typical roughness measurements are performed using stylus profilers, non-contact optical profilers, or scanning probe microscopes (SPM).An experimental approach for surface roughness evaluation based on the speckle pattern imaging has been attempted in this wor...

STATEMENT OF PROBLEM Flexural strength, hardness, surface roughness, discoloration, and abrasion resistance are important properties of veneering composite resins. Recently introduced veneering resins are purported to have enhanced mechanical properties due to their composition, but their long-term durability is not known. PURPOSE The purpose of this study was to test the impact of aging on 3...