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Perspectives for a new realization of the pascal by optical methods

机译:通过光学方法新实现帕斯卡的透视图

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Since the beginning of measurement of pressure in the 17th century, the unit of pressure has been defined by the relationship of force per unit area. The present state of optical technology now offers the possibility of using a thermodynamic definition-specifically the ideal gas law-for the realization of the pressure unit, in the vacuum regime and slightly above, with an accuracy comparable to or better than the traditional methods of force per area. The changes planned for the SI in 2018 support the application of this thermodynamic definition that is based on the ideal gas law with the necessary corrections for real-gas effects. The paper reviews the theoretical and experimental foundations of those optical methods that are considered to be most promising to realize the unit of pressure at the highest level of metrology.
机译:自17世纪的压力测量开始以来,压力单位由每单位面积的力关系定义。 目前的光学技术现象现在提供了使用热力学定义的可能性 - 特别是理想的气体律 - 为了实现压力单元,在真空制度和略微上方的情况下,精度比传统方法更好或更好 每个区域的力量。 2018年SI计划的变更支持该热力学定义的应用,该定义是基于理想的气体定律,具有实际气体效应的必要校正。 本文审查了这些光学方法的理论和实验基础,被认为是最有希望的,以实现最高级别的压力单位。

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