12 October 2010 Application of digital holography in temperature distribution measurement
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Abstract
The temperature variation of the testing sample can result in the density change of the surrounding air, and then the refractive index of the air is altered accordingly. Therefore, the temperature can be obtained by detecting the phase. In this contribution, the digital holography is presented to measure the temperature distribution, which can achieve the fullfield and non-destructive detection. The phase distribution can be determined by applying a single fast Fourier transform to the digital hologram. In the experiment, the LFT digital holography system is built and employed to inspect the temperature field of an electric soldering iron. The phase images are obtained, showing the temperature distributions around the iron with different position and time. The experimental results demonstrate the feasibility and effectiveness of the digital holography for the temperature measurement.
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Yunxin Wang, Dayong Wang, Yan Li, Jie Zhao, Puhui Meng, Yuhong Wan, Zhuqing Jiang, "Application of digital holography in temperature distribution measurement", Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 765653 (12 October 2010); doi: 10.1117/12.865785; https://doi.org/10.1117/12.865785
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