Division of Metrology in Length and Precision Engineering




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Address: No.18,Bei San Huan
Dong Lu,Chaoyang
Dist,Beijing,P.R.China, 100013



80m Large-scale Standard Instrument Was Built By the Division

An 80m large-scale standard instrument designed by the division in 2006 reaches a measurement uncertainty of U=0.1μm+2×10-7L(k=2), where L is in meter. It is among international advanced level. The instrument is able to provide calibration service for interferometers, geodimeter and laser rangefinder etc. It consists of an 80m precision guide-rail system, a laser measurement system, an ambient temperature sampling system and an auto-control system.

Till 2012, this device has got a guide-rail whose length is the second longest, just 20m shorter than the Japanese 100m rail. Its specifications are among  international level.