the red laser beam light is emitted by the red portable laser pointer

For example, the red laser beam light is emitted by the red portable  laser pointer .
Turn on the laser diffraction particle size analyzer, and preheat for 30 min. The provisions of the instrument manual, open the instrument to be tested. The results of calculation and data processing. Read the D10, D50, D90 values, the results take the test three times the average. Should contain the following: production batch number, date, test sites, used to test the instrument model, the use of dispersants and operating personnel; test results to the particle size distribution data table, the distribution curve, than the surface area, D10, D50, the D90, etc., Print and records; anomalies observed in the determination; any operation or freedom of choice in this standard test conditions. Laser particle size analyzer determination of particle size distribution.
Which can calculate the width W of the box. Protect the hydraulic forming die. The mechanical hand a pre-molded pipe into the hydraulic machine in the lower part of the die, * The author must ensure that the location of each release is accurate. Before the fall of the upper die, a divergent type sensor to measure the distance of the critical section of the distance from the tube, it will ensure that the die is closed in the correct position. The two-axis crane positioning. The face of the reflector with two reflective sensors installed, the reflector is installed in the two mobile units on the bridge crane. A unit before and after exercise, and the other about sports. When the crane driver board aircraft roll, two sensors to monitor the distance of the reflector, through the PLC can continuously track the precise location of the crane. The red laser beam light of portable  laser pointer is much easier to transmit through the air.
Laser is a nature originally does not exist, due to the shock issue has good directionality and high brightness, good color and good coherence properties of light. Physicist mechanism traceable to the hypothesis put forward in 1917 Einstein explained the law of blackbody radiation to produce laser light absorption and emission via stimulated absorption, stimulated emission and spontaneous emission are three basic process [1]. The so-called laser technology, is to explore these features to develop a variety of laser and explore the application of laser technology general benefit of mankind. For over 30 years, laser technology has been rapid development, the use of laser technology has not only developed a variety of individual characteristics of the laser.
And higher than the beam power from conventional lasers, the FEL can be tuned to different wavelengths makes it more reasonable type of laser for ship defense - because its beam from atmospheric interference, and this sea interference is very serious. Their research shows that  in offshore operations, the thermal blooming limit high-energy laser beam propagation in the atmosphere, therefore, it limits the effectiveness of laser weapons.