Monitoring microstructural material changes in paper through microscopic speckle correlation rate measurements

• Published in: Optics and lasers in engineering Vol. 42; no. 2; pp. 193 - 201
• Main Authors: Sjödahl, M., Larsson, L.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.08.2004; Elsevier
• Subjects: Correlation; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Experimental Mechanics; Experimentell mekanik; Fundamental areas of phenomenology (including applications); Imaging and optical processing; Materials science; Materials testing; Microscopy; Microstructure; Nondestructive testing: optical methods; Optics; Physics; Speckle and moire patterns; Speckles; Speckles; Correlation; Microscopy; Microstructure; CCD camera; Measurement systems; Printing paper; CW lasers; Experimental study; Optical set up; Spatial resolution

A system for real-time digital speckle correlation rate measurements is developed and applied on printing paper in the micro-scale. The system consists of a continuous laser and a CCD camera connected to a PC. To measure on objects in the micro-scale the system is connected to a stereomicroscope whe...