Contents

• Introduction
  • Reasons for studying flow in porous media
  • Summary of experimental work
• Optical set-up for the Laser light sheet
  • Some topics in optics
    • Some useful formulas for lenses
    • Aberrations and Plano-convex lenses
    • Diffraction and finite width effects
    • Frauenhofer diffraction
  • Measuring the thickness of the laser light sheet.
  • Optical Set-ups
    • Horizontal plane
    • Vertical Plane
  • Final optical set-up
• The Model Porous Medium
  • Fluorescence
  • Matching of optical index of refraction
• Recording and Digitalization
  • 35mm film
  • PC Vision Digital Image Acquisition System
  • Photometrics CCD camera
    • System Hardware
    • CCD-chip architecture
    • Noise Effects
    • Camera Control Software
    • Maintenance
• Dispersion Theory
• Dispersion Experiments
  • Experiments with Nigrosin as colored tracer
  • Experiments with Rhodamine 6G fluorescent tracer
• Conclusions
  • Dispersion
  • Reconstruction
• References
• Appendix
• Conversion from PC Vision format to binary format
• Camera control
• Reading from DAT tapes
• Radial grey level distribution
• Conversion from 16-bits to Standard 8-bits format
• Reconstruction software
• Conversion to PostScript
• PostScript description of the structure
• Data set reduction
• About this document ...