Highly stable digital holography for temperature measurement

Manoj Kumar; Osamu Matoba; Yasuhiro Awatsuji

doi:10.1117/12.2586311

18 April 2021 Highly stable digital holography for temperature measurement

Manoj Kumar, Osamu Matoba, Yasuhiro Awatsuji

Proceedings Volume 11774, Holography: Advances and Modern Trends VII; 117740N (2021) https://doi.org/10.1117/12.2586311
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

We have developed a common-path configuration of digital holography offering several advantages in comparison to two-channel configurations of digital holography. This system shows a very high temporal phase stability which makes it more appropriate for real-time and fast transient dynamic measurement applications, the configuration is very simple and the system is very compact in size, and it is less vibration sensitive. Moreover, with the full use of the reference beam, the proposed system provides the field of view (FOV) as wide as that of a two-beam interferometer. The proposed system is used for the measurement of the refractive index and temperature inside the candle flame. A complete analysis of the temperature measurement from the recorded digital hologram in the presence of a candle flame is demonstrated. The advantages and limitations of the systems are also discussed.

Citation Download Citation

Manoj Kumar, Osamu Matoba, and Yasuhiro Awatsuji "Highly stable digital holography for temperature measurement", Proc. SPIE 11774, Holography: Advances and Modern Trends VII, 117740N (18 April 2021); https://doi.org/10.1117/12.2586311

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KEYWORDS

Digital holography

Temperature metrology

Combustion

Holographic interferometry

Phase measurement

Refractive index

Sensors

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