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Application filed by Научно-исследовательский институт "Изотерм"filedCriticalНаучно-исследовательский институт "Изотерм"
Priority to SU4784915/28ApriorityCriticalpatent/SU1816082A1/en
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Publication of SU1816082A1publicationCriticalpatent/SU1816082A1/en
FIELD: measurement technology. SUBSTANCE: in compliance with invention two quadrature interference signals are extracted forming polarization and intensity of interfering beams. Then these signals are converted into electrical ones from which information on value and direction of movement is extracted. Polarization and intensity of interfering beams are so formed that one output interference signal is result of summing of two beams of equal intensity with similar character of polarization and the other one is result of summing of two elliptically polarized beams. In second signal polarization direction at which intensities of interfering beams are equal and change of intensity of interfering signal requires phase shift relative to change of intensity of first signal is extracted. EFFECT: increased authenticity of measurement of linear movements. 3 dwg
SU4784915/28A1989-12-051989-12-05Device measuring linear movements
SU1816082A1
(en)