Error Analysis and Application in the Downhole Measurement of Laser Pointer

A laser pointer has characteristics of the low price, simple installation, launching the visible and used easily and so on. You can quickly and accurately calibrate the roadway center line, waistline position by use of a laser pointer, which can effectively control the roadway due to the ultra-dug. To use a laser pointer reasonably in the roadway can greatly enhances the quality and speed of roadway construction.