Monitoring system for investigating the effect of temperature change on optical properties

  • Ercan Kara
  • İnci Çilesiz
  • Murat Gülsoy
Original Article


Knowledge about the changes in optical properties is needed for planning safer and more accurate laser treatments. A monitoring system was developed to study how the optical properties of a lipid emulsion are affected by temperature changes. A double-integrating-sphere system is modified with a controlled heating apparatus to measure the temperature-dependent diffuse reflectance and total transmittance values. The absorption and reduced scattering coefficients were estimated from the reflectance and transmittance values using an inverse adding-doubling method. The total transmittance showed positive correlation with temperature while the diffuse reflectance was found to be negatively correlated. Although the absorption coefficient did not demonstrate a statistically significant change with temperature, the reduced scattering coefficient was negatively correlated. By using the obtained optical properties, Monte Carlo simulations were performed to observe the difference in light propagation within a tissue. The results indicate that temperature-dependent changes in optical properties should be taken into consideration for a safer laser treatment.


Double-integrating-sphere setup Temperature effect Optical property Monte Carlo simulations 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.


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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Biomedical EngineeringBoğaziçi UniversityİstanbulTurkey
  2. 2.Department of Electronics and Communications EngineeringDoğuş UniversityİstanbulTurkey
  3. 3.Department of Electronics and Communication Engineeringİstanbul Technical UniversityMaslakTurkey

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