DEVICE FOR MEASURING THE DEVIATION FROM RECTILINEARITY Russian patent published in 1997 - IPC

FIELD: measurement technology. SUBSTANCE: device is designed to check nonrectilinearity and nonflatness of long surfaces, for example guides of high-accuracy large- sized lathes. Higher accuracy of measurement of deviation from rectilinearity of profile under test at turbulence of flows on the route of laser beam spreading is obtained due to decrease in diameter of information beam constriction. Device has axicon with holes installed in direction of laser beam travel behind telescopic system and light beam splitter with hole or mirror positioned in center. Light beam splitter is also installed in direction of beam travel behind reflector. EFFECT: higher accuracy of measurement. 4 dwg