Different green laser pointer are in different leaser beam light colors

green laser pointer is popular and well received
1990s developed the digital level is a more advanced water level can be effective in reducing human error and improve accuracy and efficiency. Digital Level with a special bar code leveling rod, through the instrument's built-in digital imaging systems, automatic acquisition of the bar code reading of the leveling rod. Although this water level can achieve the automation of reading, but they want to use the bar code optical imaging to the sensor readings, so it is the dependence of the light conditions, the more difficult to adapt some little light under the conditions of measurement. Laser level of the improvement program. Laser Level and Digital Level has its own strengths and weaknesses, if the technical principles of these two instruments combine to make them the length of complementarity, to achieve the purpose of weaknesses. Based on the above thinking, the following improvements. Different green laser pointer  are in different leaser beam light colors.
Replaced by three laser beams on the basis of the original laser level, of a laser beam, the center of the level of the laser beam is still used for height measurement, the increase in the two laser beams used for the line of sight (horizontal distance) measurement. In this way, a laser level can not only elevation measurements, you can also line of sight (horizontal distance) measurement; in order to reduce the dependence of the water level on the lighting conditions, and to achieve the automation of the readings, we no longer use the optical imaging sensor in the digital level system, but on the level ruler to install a special sensing device to sense the laser spot in order to determine the coordinates of the center of the laser spot. Both reading automation, reduce human error, and can largely reduce the dependence of the water level light conditions. The laser collimator. And then the customer can control the computer operation through manipulating the emitter of  green laser pointer .
Laser with excellent direction, a continuous output of the laser beam collimation, can be seen as a thickness of almost the same straight line. Therefore, you can use the laser beam as the space baseline. According to this line of thinking produced by laser collimator capable of measuring the value degree of flatness, parallelism, perpendicularity, but also can be used as the basis of measurement of three-dimensional space. Laser alignment collimator and the collimator, the theodolite general collimator, compared with the long working distance, high accuracy, ease of automatic control, convenient operation, etc., it is widely used in tunneling, laying of pipe band , cover the high-rise buildings. Bridge-building roads, mining, and large market share and positioning. Laser, there is an excellent monochrome, so you can use the diffraction theory to facilitate alignment of the diffraction spot (such as cross bright lines) to further improve the alignment accuracy of the laser collimator, the production of laser diffraction collimator.