The computer-to-plates machine was first exhibited at the 1995 Drupa International Printing Exhibition and was used in commercial operations in the Drupa 2000. The global printing market is responding to this new technology with a high growth rate. At present, the installed capacity of the global market has exceeded 6 500 units. Although the Asian market was later started, there are more than 30 installed units in Hong Kong and China. However, there are a large number of operators. Although they are interested in investing, they are still observing the evolution of science and technology and seeking the most suitable models for them. The development of CTP machines is also advancing with each passing day. New models and new technologies have emerged over the past few years, and many models have been eliminated. In the case of light sources, almost all wavelengths of laser light have been used on CTPs, but as of today, it seems to have been integrated into two camps: one is a silver salt plate system using a visible light laser, and the other is a heat using an infrared laser. Sensitive edition system. The two systems have their own advantages and disadvantages, each has its own supporters, and even sparked controversy on the internationally-known Seybold. However, it is hard to say which system will become the mainstream in the future. In the case of Agfa, the two systems are balanced development to meet the needs of different customers.
Before the Drupa 2000 was on display, it seemed that the manufacturers of the heat-sensitive systems were dominant, but when Drupa 2000 introduced multiple new models using violet lasers, it appeared that the two camps were evenly matched. In view of this, Mr. Kurt Wolf, a senior correspondent in Europe of Seybold, paid special visits to various suppliers and users to understand the development and characteristics of violet lasers, and explained why violet lasers could emerge after Drupa and were favored by the market. This article refers to Mr. Wolf's research report, combined with relevant product information, to introduce to readers the characteristics of purple laser.
The first thing to clarify is that the violet laser is not an argon laser. Many people have been mistaken for violet lasers that are the same as argon lasers more than a decade ago. But in fact this is totally different two kinds of laser technology. Argon laser is an early gas laser, which is bulky and requires a large amount of energy to excite argon to generate a blue laser. The laser tube has a short lifetime and a high selling price. The early roller scanners used argon lasers. Purple laser uses the latest laser diodes and solid-state purple lasers, which consumes very low energy, has a long life and is stable. So violet laser is not only outdated technology, but the latest technology.
1. The origin and development of violet lasers As of September last year, only one supplier in the world supplied violet laser diodes. This is a Japanese company named "Nichia". It was founded in 1998. The original R&D concept was to develop diode lasers with shorter wavelengths than the infrared and red laser diodes that are already quite common on the market. The purpose is to further increase the storage capacity of optical discs. Nichia was the first company to successfully develop a violet laser with a wavelength of 391 to 420 nm. Since lasers with shorter wavelengths have smaller laser spots, a better optical focus lens can be used to write more data in a storage medium of the same density.
The following table shows the relationship between laser head wavelength and storage capacity used by different optical disk formats:
Due to the fact that the production and use of the violet laser diodes of the Nichia Corporation has not been fully popularized, the diodes are still selling at a high price, but they are still not universally available. However, this price is more affordable than the CTP of industrial products. At present, the most widely used field of purple laser diodes is CTP.
Nichia said that in the next five years, the price of violet laser diodes can be reduced to an acceptable level for home appliances.
Second, the advantages of violet laser Resolving high and short wavelength generated by the smaller laser point, can provide a higher resolution, but also represents a higher print quality. Its output resolution can reach 250lpi.
Small size and high speed Due to the shorter laser spot generated by the short wavelength, the volume of the reflective lens of the laser head can be reduced. The smaller laser head volume means that the speed can be increased. With the high-sensitivity silver salt plate, the laser head speed can be as high as 55,000 rpm. If converted to the circumference of the inner drum, the laser sweep speed is 5078km/h, which is equivalent to 4.26 times the speed of sound. (To be continued)
Before the Drupa 2000 was on display, it seemed that the manufacturers of the heat-sensitive systems were dominant, but when Drupa 2000 introduced multiple new models using violet lasers, it appeared that the two camps were evenly matched. In view of this, Mr. Kurt Wolf, a senior correspondent in Europe of Seybold, paid special visits to various suppliers and users to understand the development and characteristics of violet lasers, and explained why violet lasers could emerge after Drupa and were favored by the market. This article refers to Mr. Wolf's research report, combined with relevant product information, to introduce to readers the characteristics of purple laser.
The first thing to clarify is that the violet laser is not an argon laser. Many people have been mistaken for violet lasers that are the same as argon lasers more than a decade ago. But in fact this is totally different two kinds of laser technology. Argon laser is an early gas laser, which is bulky and requires a large amount of energy to excite argon to generate a blue laser. The laser tube has a short lifetime and a high selling price. The early roller scanners used argon lasers. Purple laser uses the latest laser diodes and solid-state purple lasers, which consumes very low energy, has a long life and is stable. So violet laser is not only outdated technology, but the latest technology.
1. The origin and development of violet lasers As of September last year, only one supplier in the world supplied violet laser diodes. This is a Japanese company named "Nichia". It was founded in 1998. The original R&D concept was to develop diode lasers with shorter wavelengths than the infrared and red laser diodes that are already quite common on the market. The purpose is to further increase the storage capacity of optical discs. Nichia was the first company to successfully develop a violet laser with a wavelength of 391 to 420 nm. Since lasers with shorter wavelengths have smaller laser spots, a better optical focus lens can be used to write more data in a storage medium of the same density.
The following table shows the relationship between laser head wavelength and storage capacity used by different optical disk formats:
Due to the fact that the production and use of the violet laser diodes of the Nichia Corporation has not been fully popularized, the diodes are still selling at a high price, but they are still not universally available. However, this price is more affordable than the CTP of industrial products. At present, the most widely used field of purple laser diodes is CTP.
Nichia said that in the next five years, the price of violet laser diodes can be reduced to an acceptable level for home appliances.
Second, the advantages of violet laser Resolving high and short wavelength generated by the smaller laser point, can provide a higher resolution, but also represents a higher print quality. Its output resolution can reach 250lpi.
Small size and high speed Due to the shorter laser spot generated by the short wavelength, the volume of the reflective lens of the laser head can be reduced. The smaller laser head volume means that the speed can be increased. With the high-sensitivity silver salt plate, the laser head speed can be as high as 55,000 rpm. If converted to the circumference of the inner drum, the laser sweep speed is 5078km/h, which is equivalent to 4.26 times the speed of sound. (To be continued)
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