Refractometer for interferometric integral measurement of the refractive index of the air.
CH685457A5
Interferometric phase meter with distance measuring and wegmessenden measurement paths.
CH684025A5
A heterodyne interferometer double.
DE3801110A1
Method and device for producing coherent electrical magnetic radiation from two spectrally closely adjacent, linear-polarised wavelengths, whose polarisation directions are oriented orthogonally with respect to one another
CH674676A5
Refractometer for measuring refractive index of air - has measuring path defined by plane parallel rod of defined length
CH674674A5
Interferometric ranging device using coherent electromagnetic beams - uses two different frequencies for providing phase difference measurement
CH677706A5
Light source for interferometric length measuring device - has two light sources with constant difference frequency and optical polarisation mixer
