Abstract

We applied digital holography (DH) technology in a quantitative measurement of the density distribution of a low refractive index transparent substance (e.g., the vapor of suspended droplets). An optical setup was built based on the Mach–Zehnder interferometer. A measurement performance test showed the mean relative error of the measurement error was about 2.0%; that of the environment disturbance error was about 0.47%. By a quantitative method to assess the precision limit, the temperature measurement precision could achieve 0.01°C, and the vapor density measurement precision could achieve ${0.0001}\;{\rm{kg/}}{{\rm{m}}^3}$. We believe that all the benefits above make the setup a good choice for application in the Chinese space station.

© 2021 Optical Society of America

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Data Availability

Data underlying the results presented in this paper are available in Ref. [46].

46. D. R. Lide, ed., CRC Handbook of Chemistry and Physics, 82nd ed. (Taylor and Francis, 2001), pp. 10–218.

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