In the report the arrangements of laser interferometers for machine industry are presented; the laser interferometer LSP3O for investigation of geometry of machine tools, the setup for inspection of ball screw and laser liner for CNC machine. Outstanding feature of the interferometers is the stabilization system of laser frequency using surface stabilized ferroelectric liquid cells (SSFLC).
A model for the correlation of the lasing action and the ionisation processes of a CO2 laser is presented. The model takes into account the step ionisation of N2 and CO molecules. Making use of the method of rate equations the expressions of the correlation between the laser output power variations and the discharge impedance changes, as well as spontaneous light intensity changes, are obtained.
B Kharkov, UkraineFerroelectric liquid crystals (FLC) as light modulators in the stabilization system of a Zeeman laser increase the quality of stabilization due to the high switching speed and make the whole system very compact. We analyze the operation of the optical part of such a stabilization system and derive optimum values of the FLC cell parameters. Properties of available liquid crystals and their temperature dependence are considered as well as, in particular, the intluence of a slight ellipticity of the laser radiation.
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