PROCESS CONTROLLING POSITION OF FIBER, METHOD OF CONTROL OVER POSITION OF FIBER AND DEVICE TO MEASURE DISTANCE TO SURFACE Russian patent published in 2000 - IPC

FIELD: measurement technology. SUBSTANCE: radiation is directed on to fiber to control its position, light scattered from fiber is modulated spatially, modulated light is detected, spatial frequency ω_D of detected light which specifies location of fiber is determined. Controlling signal depending on value of spatial frequency ω_D. is generated in addition to control position of fiber. Device to measure distance to surface has illumination aids, aid for spatial modulation of scattered light coming in the form of Ronchi grid, for example, detecting aids and aids determining spatial frequency ω_D.. EFFECT: increased measurement accuracy. 14 cl, 12 dwg, 1 tbl