Violet Laser Source CTP Technology Advantage

Since the May 2000 laser light source was officially launched on the market, it has been regarded as the most advanced thermal light source in CTP equipment. Due to many challenges, many users have found that this new light source has many advantages from a practical point of view. After adopting this new technology, why can the violet laser get so much attention from users? The following are some technical analysis.

faster

The so-called violet light source is a kind of laser that uses 400nm spectrum, and the shorter the physical characteristic light spectrum is, the larger the energy is. Therefore, the purple light source is relatively common to other CTP light sources such as green (532nm) and red (830 or 1064nm). Such as can have a higher imaging speed, the principle is that the laser can stay on the plate for a shorter time and can provide enough energy to stimulate the reaction of the film on the plate. Using this feature, equipment manufacturers can increase the scanning speed. For example, the current infrared laser scanning speed is 20,000 lines/minute, the green laser scanning speed is 37,500 lines/minute, and the violet laser scanning speed can be as high as 55,000 lines/minute. In minutes, this is equivalent to a scan of 1024 x 800mm on a 2400 dpi in 1 minute 46 seconds (other operating hours are not included).

More accurate

Also because of the physical characteristics, the shorter the spectrum, the other characteristic is that the laser spot will be smaller, so it is allowed to scan more fine dots on the plate, and the previous light source can only generally show 200 on the photosensitive plate. Lpi (1-99%) outlets, but 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 is not effective for both red and green light, the violet CTP device can use a yellow safety light (red light + green light = yellow light) to provide the operator with The brighter darkroom environment makes the operation more convenient.

Although the laser manufacturer's warranty period for the violet laser is the same as that of the conventional green laser, it is also 3,000 hours. However, due to the operating characteristics of the violet laser, the laser will only be activated when it is actually imaged, and will not be activated for the rest of the time. The life of the laser is lost, and as for other laser operation modes, the laser is activated at the same time after the machine is turned on, causing unnecessary loss to the laser. Therefore, the actual life of a violet laser is longer than that of other CTP laser sources. At the same time, because the same kind of laser is also widely used in other industries (such as the commonly used DVD drive), because of the large amount of users can mass production to reduce costs, so that the price of this light source is lower than other CTP laser sources.

With the above features introduced, it is not difficult for everyone to understand why violet laser technology can shake thermal technology. In fact, CTP technology is still developing rapidly. It is believed that new technologies will continue to be introduced in the market in the future. However, in the long term, , Manufacturers are aware that the ultimate development of thermal technology is near-free flushing technology, which can further reduce one process to make the production effect more stable, and more importantly, it can avoid the manufacture of syrup waste to meet the needs of environmental protection. However, in the short to medium term, except for Agile’s Galileo Talant thermal platesetter, which has the flush-free thermal function on the market, other manufacturers’ so-called thermal products still require rinsing procedures, failing to achieve thermal sensitivity. best effect. If the advantages of the above-mentioned violet technology are compared with general thermal products (refers to the thermal technology required for flushing), the thermal accuracy is slightly better than accuracy (but only the difference between 250 lpi and 300 lpi). Not necessarily have any advantage. 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 are not willing to invest in the most advanced technology in one step. Therefore, considering the current practical point of view, if the production requirements are within 250,000 prints and the accuracy is lower than 250 lpi, users will believe violet laser is an ideal choice.