Purple laser CtP detection

In May 2000, after the CTP product of the violet laser light source was officially introduced to the market, it has always been considered as the most advanced thermal light source CTP product in the CTP equipment. Many users analyzed from a practical point of view and found that the new light source does have many advantages, so everyone adopted this new technology. Why the violet laser light source can get everyone's favor? Hope that the following technical analysis can uncover its mysterious veil.

faster

The so-called violet laser is a laser with a wavelength of 400 nm. People with physics knowledge all know that the wavelength of light is inversely proportional to its energy, that is, the shorter the wavelength, the greater the energy of light. Compared to other commonly used CTP light sources such as green light (532 nm) and red light (830 or 1064 nm), the purple light source certainly has higher energy. With the violet laser light source, the shorter residence time on the plate can also provide enough energy to stimulate the reaction of the film on the plate, so its imaging speed is also higher. Using this feature, equipment manufacturers can increase the speed of scanning. At present, the infrared laser scanning speed is 20000l/min, the scanning speed of the green laser is 37500l/min, and the scanning speed of the violet laser can reach as high as 55000l/min, equivalent to a 1024mm in 2400dpi in 1 minute 46 seconds. 800mm version of the scan (other operating hours not included).

More accurate

Also from the physics point of view, the shorter the spectrum is, the finer the laser spot is, so that finer dots can be scanned on the plate. The use of conventional light sources generally allows 200 lpi (1% to 99%) dots to be displayed on the photosensitive plate, while the use of violet lasers can increase the accuracy to 250 lpi.

More convenient operating environment

Since the digital plate used with the violet laser does not react under both red and green light, the violet laser CTP device can use the yellow light (red light + green light = yellow light) as a safety light, thus providing the operator with Brighter operating environment makes operation more convenient.

Longer life, cheaper cost

The warranty period provided by the laser manufacturer to the violet laser source is the same as that of the conventional green laser, which is also 3,000 hours. However, since the operating characteristics of the violet laser are that the laser only needs to be started when it is actually imaged, rather than starting the laser at the same time as other lasers, the lifetime loss of the laser is lower than that of other laser generators. This is why the actual life of violet laser products is longer than other CTP laser sources.

Since the violet laser light source is also widely used in other fields (such as a commonly used DVD disc player uses a laser of this wavelength), the amount of users is very large. A lot of production reduces the cost and makes the price of this light source lower than other CTP laser sources.

With the above features introduced, it is not difficult to understand why the violet laser technology can shake the thermal technology. In fact, CTP technology is still developing at a rapid rate. It is believed that new technologies will be introduced into the market in the future. Looking at the long-term goal, the ultimate development of the thermal technology is the flush-free technology. The role is to further reduce the number of processes and make the production more stable. What's more important is to avoid making waste medicines and meet environmental protection requirements. However, on the market, in addition to Agile's Galileo Talant thermal platemaking machine, which has a flush-free thermal function, other manufacturers' thermal products still require a flushing process, failing to achieve the optimum thermal effect. With the advantages of violet laser technology compared with the general thermal products (refers to the need for thermal processing thermal technology), the thermal technology in addition to slightly better accuracy (only 250lpi and 300lpi, respectively), other aspects are not necessarily What advantages. On the contrary, the above-mentioned no-clean heat-sensitive technology is more than 40% higher than photosensitive products in terms of equipment and materials. At present, most users still care about investment and returns. Therefore, from a practical point of view, if the production requirements of the printing rate within 250,000 India, the accuracy is less than 250lpi, I believe that violet laser products are very ideal for users.