Abstract
This study dealt with the measurement of thermal conductivity and thermal diffusivity of biological materials by a noninvasive method with laser heating and infrared thermometry of a target surface. In this paper the error in the measurement of temperature at the heated surface by the infrared thermometer was evaluated theoretically by taking into account of radiation from an absorbing media. The results showed that the temperature measured by an infrared thermometer that uses the wavelength ranged between 3.0 and 5.4μm was about 0.5K lower than the real surface temperature, which resulted in 2% higher and 14% lower values in the estimated thermal conductivity and thermal diffusivity, respectively. The error could be reduced significantly by utilizing longer wavelength, 7.5-13μm, for the infrared thermometry.
