The apparatus in precise scanning-wavelength interferometry with gases is described. The
dispersion of the refractive index is measured with the aid of an evacuated Michelson …

A device employing a Michelson interferometer as an optical refractometer has been used to
measure gas pressure in the range of 10 Torr and above. The instrument is simple and its …

A Michelson twin interferometer is described, which is used for precise measurements of the
refractive index n of gases in the visible wavelength range and temperatures between 100 K …

The very large throughput of the Michelson interferometer in the field-widened configuration
has just begun to be exploited in the spectroscopic study of faint sources.[1],[2] The difficult …

Refractive index measurements of air and pure gases have been carried out by using laser
heterodyne interferometry. Measurement accuracy better than a few parts into 10 7 for …

A method for measuring the density of a gas by heterodyne interferometry is investigated.
The molar refractions are calculated for the more common commercial gases. The …

A review is given of how measurements of intensive thermodynamic properties of a gas,
such as of refractivity and permittivity, can enable single-parameter monitoring of gas …

A laser interferometric measurement technique that uses a Mach–Zehnder interferometer is
developed. This technique permits studies of the physical processes that involve a change …

A study of the comparative method of determining gaseous refractivities Page 1 Proceedings
of the Physical Society A study of the comparative method of determining gaseous …

An interference refractometer for absolute measurement of the refractive index of air has
been developed. It is essentially based on components of a commercial Zeeman type laser …