Dalian Lat Laser Technical Development Co.,Ltd.Beijing Branch

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In the early 1990s,verticality and linearity of the elevator guide rail were tested by suspending steel wire rope while their installation and inspection.But the detection of in-use guide rail was a difficult thing.The founders and leaders of the company Liu Hongyun and several optics experts decided to work on this problem unsolved worldwide for long.
The technology of laser measurement is the ideal choice for measuring the elevator guiding rail,but they have two difficulties.First,the plumb benchmark cannot meet the high precision requirements.Second,the diffusion of laser beam can lead to errors.
Based on literature data and experimental results,the compensate technology of liquid double optical wedges and the creating technology of non-diffracting ring grating have been introduced for the first time into the fine instruments of laser measurement.
In 1993,Dalian Lat Laser Technical Development Co.,Ltd.was set up in Dalian to follow the dream.