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Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
Determination of Kubelka-Munk scattering and absorption coefficients by diffuse illumination
R Molenaar1, J J ten Bosch, J R Zijp
1Laboratory for Materia Technica, University of Groningen, Bloemsingel 10, 9712 KZ Groningen, The Netherlands.
The Kubelka-Munk theory needs boundary reflection correction for accurate dental material analysis. New equations using a half-sphere and refractive index matching improve reflection measurements.
Area of Science:
- Materials Science
- Optical Physics
- Biomaterials
Background:
- The Kubelka-Munk theory relates diffuse reflectance to material properties.
- This theory neglects boundary reflectance, a phenomenon caused by refractive index differences.
- Accurate optical property measurement is crucial for dental restorative materials.
Purpose of the Study:
- To develop and validate equations correcting for boundary reflection in Kubelka-Munk analysis.
- To improve the accuracy of optical measurements for composite restorative dental materials.
- To investigate the impact of refractive index differences on reflectance measurements.
Main Methods:
- Utilized a half-sphere setup for diffuse illumination.
- Developed and applied equations to correct for boundary reflection.
- Measured the refractive index of dental materials using a glycerol-water mixture matching technique.
- Estimated edge loss errors.
Main Results:
- Demonstrated a method to correct for boundary reflection in Kubelka-Munk measurements.
- Quantified the influence of boundary reflectance on optical properties of dental composites.
- Successfully measured and corrected for refractive index mismatches.
- Provided an estimation of edge loss errors.
Conclusions:
- Correcting for boundary reflection is essential for accurate Kubelka-Munk analysis of dental materials.
- The proposed method enhances the reliability of optical property measurements.
- This approach contributes to a better understanding of light-matter interactions in dental composites.
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