Green laser pointer has many other characteristics

Deformation monitoring of dams and other large buildings and so on. The application of the laser total station. Laser level. Laser Level with a laser beam instead of artificial reading of a water level. Laser emits the laser beam into the telescope tube, so that the horizontal laser beam shot along the collimation axis. The classification of laser level. Laser level into focus the laser level and the semiconductor laser level. The principle of the laser level. Monochromatic and coherent laser, a glass or sheet metal of a certain shading patterns can be assembled in front of the telescope objective, namely, zone plate, so that diffraction interferometry born. Telescope focusing, focusing range of the zone plate, a bright and fine cross or round laser spot, in order to more accurately target sighting. As in the former, after the standards on the ruler with the optical receiver can automatically keep track of the target, you can leveling.  green laser pointer has many other characteristics.
The basic components of laser tracker. The laser tracker is to provide a variety of measurement data and the systematic error correction, it can be divided into five parts: the angle measurement part. Including the horizontal circle, vertical circle, stepping motor and reading system, similar to the total station angle measurement devices in automatic target recognition capabilities. Horizontal and vertical circle are grating incremental measuring angle encoder, segments portray number 18000, the goniometer nominal accuracy of better than ± 2.5 degrees, angle measurement sampling rate up to 1000 times / s measuring static target, multiple measurements averaged to eliminate the fluctuations in the atmosphere. Distance measurement part. Including interferometry distance measuring device (IFM), Bird's Nest (Birdbath), absolute distance measurement device (ADM) and reflector. Interference ranging using optical interferometry principle, to measure the distance by measuring the changes of the interference fringes change.  green laser pointer points at the target they want to highlight or show.
Therefore, the method of interference of the laser tracker distance measurement (IFM) can only measure the relative distance, such as the need to measure the center of the track head to the absolute distance of the points of space must be given a reference distance. The sensor unit has a fixed point is called the Bird's Nest (Home Point or Birdbath), tracking the head center to the nest distance (reference distance) is known, began to move the reflector from the Bird's Nest, the IFM measure the relative distance of the reflector to move coupled with the reference distance is the absolute distance. Reflector tracking mainly by the position detector (PSD); the reflector is reflected back into the light through the spectroscope when some light into the position detector, when the reflector moves, this part of the light will be in the position detection device to generate an offset value. According to the offset value, the position detector will control the motor rotation until the zero offset value, so as to achieve the purpose of tracking.