Laser light source - violet laser (below)

At such a fast rate, even a single laser beam can produce 22 full-length plates per hour (1030 mm × 800 mm/2400 dpi), which is currently the highest output in the market.
The bright yellow safety light can be used because of the use of a purple light source and the corresponding light-sensitive material, so it can be operated under a bright yellow safety light, close to the bright room operation, and increase the ease of use.
Stable quality, further enhance the performance of the internal drum type laser diode light source stability, laser point strong, can produce high quality outlets, improve the printing quality. Although the current cost of violet laser is still high, but because the internal drum model uses only a single laser, so the total cost of CTP is limited; but the outer drum model is often used because it is limited by the rotational speed of the plate cylinder can not be improved. Laser beam to compensate for the speed of the defects, so the cost of replacing the new purple laser will be a relatively large increase. Therefore, at present, the CTP on the market is the first to use the violet laser in the internal drum type.
Easy to repair, quick replacement of the violet laser diode, due to its small size and high degree of modularity, it is easier to repair and replace, shorten maintenance time and increase production efficiency.
Third, the life of the purple laser is often misunderstood violet laser life is shorter, in fact, is also misled by the argon laser. The working principle of the argon laser is that the laser tube is always on when it is working, because it needs a large amount of activation energy to excite the argon gas to generate laser light, so it cannot be controlled in a circuit control mode to switch it on and off, but to use a constant light. The lamp tube uses the lens deflection to control the laser spot, so the average life is only about 2.5 years, and the effective production time is also very short.
However, the violet laser is totally different. Because it is a diode, it consumes very little energy. Therefore, when it is not in operation (starting but no exposure), the laser is not bright, and only the laser light is exposed, so it can effectively extend the laser lifetime. . At present, the lifespan of a violet laser diode is about 3,000 hours. Take the 1030×770 edition as an example, 100 plates are produced each day, 250 days a year, and 3,000 hours is equivalent to 3.5 years. This is a good value for money in terms of return on investment. It is not inferior to the infrared diode laser.
Fourth, purple laser applied to the current situation of CTP The current application of purple laser CTP plate making machine manufacturers are Agfa, Barco, Krause Biagosch and Baolu Defu and other manufacturers, with the printing plate for the silver salt version. Currently offering silver salt version manufacturers are Agfa and Mitsubishi Paper. Since the silver salt plate is a mature and stable technology, and is currently the most widely used digital plate in the world, its high-resolution characteristics can just take advantage of the short wavelength of the violet laser, so the output resolution can reach 250 lpi. With the high-sensitivity of the silver salt version, only 2.5 μJ of energy can be used to sensitize, and 2.5 μJ of energy is equivalent to only 5% of the output power of the 5 mW laser head manufactured by TuiOptics. The silver salt version is a suitable choice, and the perfect match is not an exaggeration.
V. Future development of violet laser As many advantages of violet laser, so many well-known home appliances and semiconductor manufacturers have gradually invested in R & D, such as Sony, Haupu, Sanyo and so on. The large number of investors means that the future products must be more diversified, more advantages will be developed, and the selling price will be reduced due to competition and popularity. With the current development, the violet laser is taking off and will not be eliminated in the short term. At present, in terms of CTP applications, Nichia is also working hard to increase the energy of lasers. The goal is to produce 30 mW products (now 5 mW) for use in plates other than silver salt plates, such as photopolymer plates. Due to the need to increase the output energy by 6 times, there are still some technical difficulties.
VI. Violet Laser CTP Good or Thermal CTP When a good operator invests in CTP, there are still many factors actually considered, and the thermal CTP system is also continuously improving. Because each has its own irreplaceable advantages, it also exists on the market to meet different needs of customers. So basically there is no absolute best CTP system, but only the system that best suits your business environment. However, the many advantages of violet lasers really made this product accepted in the market when Drupa 2000 was launched, and it has created a remarkable sales volume. It also hopes that the development of technology will continue to bring more benefits and business space to the printing industry.

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