Measurement laser complex for reproduction and transfer of the size of the length unit in the great lengths area

摘要

Measurement laser complex comprises: (a) a reference measurement laser system of "Razmer" type; (b) a long-range laser phase motion meter of IPL-FD type. The size of the length unit reproduced by measurement laser system of "Razmer" type certificated by the working standard of the length unit VETU-1-1-93 is transferred to the long-range (about 5000 m) motion meter of IPL-FD type by comparison of them on the linear interference comparator ILK-25. The long-range laser motion meter IPL-FD is based on a wave length measure, which is realized by means of a stabilized laser radiation generator working in the regime of generation of two longitudinal modes. It is experimentally stated that instrumental error of this range-finder does not exceed 0.17 mm and when the correspondent measurement technique is applied the error can be reduced to 0.05 mm.