Noncontact Temperature Measurement of Metal Surfaces Using Reflected Laser Beam
Year: 2024
Type: article
Abstract: A temperature measurement system with a reflected laser beam that does not require temperature modulation was developed for the thermal design of electronic devices.The system combines a balanced photodetector and lock-in amplifier to make reflectance change measurements possible with an extremely high signal-to-noise ratio.First, to evaluate the accuracy of the reflectance change measurement, the reflectance change of a Ni thin film temperature-controlled by a heater and thermocouples was measured as a function of temperature change.To evaluate the accuracy of the temperature change measurement, the reflectance change was measured by heating a Ni thin film that imitated the wiring pattern of an electronic circuit.The experimental results showed that the standard deviation of the ratio of reflectance change from the reference reflectance was <1.00 × 10 -5 at a constant temperature.Moreover, the error margin of the calculated temperature change was ±1.0% for a change of 22 °C or more from the reference temperature, and the performance was sufficient for the estimation of local temperature.
Source: Sensors and Materials
DOI: 10.18494/sam5165
Authors: Taichi Murakami, Masaki Shimofuri, Toshiyuki Tsuchiya, Shugo Miyake
Institutions: Setsunan University, Kyoto University
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $748
OpenAlex ID: W4401599283