Abstract: Utilizing the basic principles of a Michelson interferometer, a temperature measurement device can be designed. This involves placing a transparent sample in one arm of the Michelson interferometer and allowing a laser beam to pass through it. Interference fringes become apparent when the beams from the two arms interfere. Since these fringes are affected by the optical path difference between the two arms, a sensor is used to record changes in the interference fringes. By analyzing these changes in the optical path difference using a microcontroller, variations in the samples refractive index, and consequently its temperature, can be calculated. Based on this principle, we propose the development of a real-time non-contact temperature measurement device equipped with an interference fringe automatic recognition system. This system intelligently identifies the number and direction of fringe movements to achieve temperature measurement. We will conduct tests to assess the accuracy of measurements and discuss potential applications of this device in other fields such as photothermal effects, measuring expansion coefficients, and elastic moduli.

Key words: Michelson interferometer, interference fringes, temperature measurement