2017年10月01日

The Development of LED Chip Technology

Laser processing in the application of food machinery has the following advantages. Safety and hygiene: laser cutting is a non-contact processing, which is very clean, suitable for food machinery production; cutting slit: red laser pointer cutting of the slot is generally 0.10 ~ 0.20mm; cutting surface smooth: laser cutting Cutting surface without burrs, cutting all kinds of thickness of the plate, and the truncated surface is very smooth, no secondary processing to create high-grade food machinery; speed, and effectively improve the efficiency of food machinery production.

At present, when it comes to automatic vehicle environment awareness technology, many people will first think of lidar. Indeed, compared to on-board sensors such as cameras and millimeter wave radars, lidar has the advantages of high accuracy and high resolution, and has been widely deployed on many automatic test vehicles. But this technology also has its disadvantages: high cost can not be ignored, such as the Ibeo LUX 4 line laser radar, the price as high as $15 thousand, while Google announced that although at the beginning of its independent development of the laser radar can reduce the cost of 90%, each still $7500. Such a high price is clearly unrealistic for an eventual self driving car.

The output wavelength of the green laser pointer covers a shorter band, and the short wavelength laser has been widely used. Many advanced manufacturing processes require cold processing, such as in the manufacture of smart phones, often need to use short wavelength, short pulse UV laser to deal with. Short wavelength lasers have been widely used in surface marking, semiconductor wafer processing, drilling, cutting and other fields. The pulse speed of the laser is getting faster and faster, and the ultrafast laser has been developed rapidly. It has been driven into industrial applications by means of simpler structure, more convenient operation, lower cost and more stable performance.

With the development of blue green LED chip technology and the expansion of scale, the demand for laser cutting equipment is higher and higher, which has forced the laser equipment supplier to upgrade the equipment. At the same time due to a decrease in the development of laser technology and the price of domestic laser dicing equipment also began to enter the market, a new generation of UV laser dicing equipment occurs, its production capacity has been increased to 3-5 times the generation of dicing machine, up to 15 pieces per hour.

Cutting effect: wide opening, high cutting efficiency, short high power laser pulse, obvious gasification, more suitable for side wall corrosion process. With the rapid development of laser applications, the upstream optical component enterprises benefit from the development of the industry, showing overall growth. As the basic components, it has played a catalytic role in the development of laser industry.

According to the relative movement of the cutting head and the table, the CNC laser cutting machine can be divided into three types: the optical path, the fixed beam path, the beam moving form, the hybrid optical path and the semi-fixed semi-moving mixed mode. There is also a hinged movable arm fixed optical path flight beam transmission form, known as the constant flight optical path, referred to as constant light path. In the cutting process, only the cutting head moves in the X and Y directions, and the table position is fixed. This kind of cutting machine processing plate size, large quality; equipment covers an area of small, no need to clamp the workpiece, on the material to facilitate; machine acceleration performance, high positioning accuracy. So much respected market, known as the mainstream of the international market models.

One of the advantages of QCW fiber lasers is the ability to quickly increase and decrease power levels and can switch from pulse mode to continuous operation mode online. This is achievable in view of the fact that there is no thermal response in the fiber resonator without the thermal lens and the pump diode, but this can not be done if the laser is used to pump the laser pen. A single QCW fiber laser pulse can be modulated using analog or internal pulse generators to achieve the optimum time pulse shape required for any particular application. The operator can also preprogram the required pulse sequence using the customized repetition frequency and power modulation.


タグ :laser


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