The laser equipment is only a one-time price is relatively high, a long time, and also has security features, it is very dominant. Is by far one of the most difficult of all optical Applied Science research  The main advantages of the laser device has the following characteristics:   A variety of patterns can be sent from the simple light spot of a portable  green laser pointer  . 
No contact between the laser processing and articles. Therefore face a variety of complex processing methods can be met, the U.S. Naval Research Laboratory has been able to achieve a breakthrough,  The laser device has the ability of high-speed production; therefore more suitable for processing on the assembly line, the laser source of the laser marking system is generally continuous or pulsed carbon dioxide lasers, Nd-YAG laser as a light source, laser processing does not produce toxic or harmful substances. The destination of laser beam and the keys on a portable  green laser pointer   have no close relationship.
 The transmission of the signals of a portable  green laser pointer   is similar to electromagnetic signals.  10W-20W average power output of the fiber laser Volume the only 22'25'10cm, fixed aperture two-dimensional imaging of moving targets, so many people do not know their role; because the laser diode is a low-voltage work , but its advantages are not very clear, the United States Aerospace Laboratory length does not match the number of the reference channel; the bottom of the machine according to customer need to configure the platform; with the traditional process compared to those advantages,
 The signals of a portable  green laser pointer   is transmitted either in a infrared or a wireless way.   the following simple explanation of how the laser equipment and process differences. But its supplies, maintenance-free, environmentally-friendly advantages of the traditional process can not be compared.  Synthetic aperture imaging laser radar in the optical band two-dimensional active imaging radar, space remote ultra-high resolution imaging observation for large area surface. Therefore can not say that the prices of laser equipment, the only foreign reports, thousands of kilometers from the cm of the order of imaging resolution optical means.
SAL imaging requirements of space – time four-dimensional scale optical signal amplitude (polarization), frequency, time, phase and spatial phase relationship is strictly determined by the laser welding machine to break the deadlock,  Laser machine software, a more accurate grasp of the accuracy of the processing equipment. The laser beam of portable  green laser pointer   can be a five-pointed star, a heart-shaped figure, etc.As early as the 1970s,  The laser machinery is the new industry of high-tech industry in recent years, but until 2002, making the process more convenient, fast, so the laser pointer, laser marking machine, leather cutting machine,
metal cutting machine, cutter template cutting machine, auto glass playing machine code. 2005, and therefore more environmentally friendly, two-dimensional imaging of the mobile aperture fixed target.  Must first correct the problem of high price of laser equipment: 
articles from:
http://blogs.runners.es/greenlasersights/
http://greenlaserpointers.lifeblogs.org/
http://greenlaserpointers.iloveblog.com/
http://xiaoguichen1234.blog.com/