laser pointers should be delivered together with the products

 The key laser cutting laser source.
If the laser is continuous emission, the measurement range up to 40 km and can carry out day and night operations. If the laser pulse is fired, the absolute accuracy is generally lower, but for distance measurement, can achieve a good relative accuracy. The world's first laser, Hughes Aircraft Company by the U.S. scientists Maiman in 1960, first successfully developed. The U.S. military quickly carried out on the basis of military laser research. In 1961, the first with a laser range finder Taiwan by the U.S. military demonstration test, which was soon after the laser range finder into practical union. 
The current crisis has not bottomed out, will continue into next year, the future will have more factories bankrupt, and the future look bad, make a small amount of the demand of customers delayed procurement plan, the current situation even worse. Market share is limited, our technology or process is always smaller than some competitors; someone else's products are often sold in the market cheaper than we, or do something new meaning; some large customers are always peer-to seize the the opportunities that our action is always very slow; there are always some rules of the peers do not want to come unscrupulous to steal our trade secrets, technical secrets and even digging; foreign competitors want to come to China, the country will also continue to have come out in a number of peer market segments and we challenge and claimed China's first; always one after another wave was underway. The customer asks for more information about the effective range of laser pointers .
Therefore, parallel interface of the "short" distance communication give large-scale use of laser processing equipment brings a great deal of restriction, which requires laser processing equipment manufacturers further developed to ensure information accuracy and more suitable for long-distance data communication the interface. USB is an abbreviation of Universal Serial Bus, the Chinese meaning "Universal Serial Bus." It is not a new bus standard, but the new field of application in the PC interface technology. As early as 1995, USB interface on the PC, successfully applied, it is the broader application of the computer interface specification. USB interface is a computer motherboard 4-pin connector, which is used between two pins to transfer data, both sides of the 2-pin power supply for the peripherals. The expert of laser pointers will research the user’s customization requirement of laser pointers in details.
Speed USB interface (USB2.0 up to 20 Mbps), connection is simple and requires no external power supply can be hot-swappable, while outside with good compatibility. USB interface can be as Hub (hub) as the number of expansion through the cascade, but the number can not cascade more than three, otherwise it will seriously affect the peripheral power supply voltage, so that peripherals can not work, there may burn out the motherboard ; in concrete work, USB communication line length is generally not more than 1.5m, or it may cause data loss and data transfer instability.
Principle: The laser cutting is the use of high power density of the laser beam scanned the surface, in a very short period of time the material is heated to thousands of first million degrees Celsius, the material melting or vaporization, and then high-pressure gas or gasification of molten material from Cut seam blown away, to the purpose of cutting material. Features: fast, smooth cut, generally without further processing; cutting heat-affected zone is small, sheet deformation is small, narrow kerf (0.1mm ~ 0.3mm); incision no mechanical stress, no shear burr; high precision, repeat good, do not damage the surface. NC programming, can process any plan, you can format the whole board lot of cutting, without a mold, saving the economy. The technical report of laser pointers should be delivered together with the products.