Abstract
Fringe-counting laser displacement meters, often called laser interferometers, have become widely used. The metrological certification of various imported laser interferometers for measuring linear and small angular displacements, and also the rectilinearity and perpendicularity of displacements in certain cases, was undertaken at Moscow Metrological Service Center. Only the certification of an instrument for measuring linear displacements is considered. Such an instrument usually includes a laser head containing a frequency-stabilized helium-neon laser, a control unit, the interferometer unit, the metrological reflector unit, a unit to provide automatic compensation for external factors, with transducers for the air parameters and onject temperature, together with a stand to take the laser head outside the object. The laser interferometer is certified separately in two displacement ranges (up to 1 m and up to 24 m). The authors note that the best performance of a particular laser interferometer can be established by certifying the laser frequency stability.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
