FIELD: physics.
SUBSTANCE: device includes a housing having the first axis, a measuring means configured to emit a light beam along the second axis displaced at a distance (a) from the first axis, a deflecting means adapted to direct the emitted light beam onto the inner surface of the structural member, and a drive means configured to rotate the measuring means about the first axis.
EFFECT: increasing the accuracy of determining the internal profile of the structural element.
18 cl, 6 dwg
