研究目的
To present an alternative method for pressure measurements in the range 1-100 kPa using a helium absolute refractometer at 532 nm.
研究成果
The study demonstrates the feasibility of using a helium absolute refractometer at 532 nm for optical pressure measurements in the range 1-100 kPa, with a resolution lower than 0.2 Pa. The main challenge for improving accuracy is the precise measurement of gas temperature within the Fabry-Perot cavity.
研究不足
The accuracy of the optical pressure measurement is limited by the temperature measurement of the gas and, to a lesser extent, by the aging rate and the pressure-induced distortion coefficient of the Fabry-Perot cavity.
