You should be able to find several indispensable facts about laser engraving process in the following paragraphs. If there’s at least one fact you didn’t know before, imagine the difference it might make.
Truthfully, the only difference between you and laser engraving process experts is time. If you’ll invest a little more time in reading, you’ll be that much nearer to expert status when it comes to laser engraving process.
Lasers are essentially optical amplifiers. The theoretical background of laser principles as the basis for an optical amplifier was made possible by Albert Einstein. He was the first person to suggest the existence of stimulated emission (the principle on which laser technology is based) in a paper that was published in 1916. The phenomenon of stimulated emission produces a highly monochromatic (one color) and highly coherent light. The first laser was built in 1960 by Theodore Maiman2.
Lasers have had a tremendous impact on numerous industrial processes, ranging from high volume automotive applications to refined electronic applications. These applications include cutting, drilling, welding, etching and even printing. There are different types of lasers. The type used most often for industrial applications is the CO2 (carbon dioxide) laser. This is the gas that is used in combination with two other gasses (helium and nitrogen) to produce the actual laser energy. The CO2 laser also is the type of laser that has been used to engrave ceramic anilox rolls.
The CO2 lasers that have been used to manufacture laser-engraved anilox rolls have seen tremendous improvements during the past decade. Lasers are used to generate pulses of energy, where every pulse is responsible for producing an impression in the ceramic. The pulse rates with which the lasers operate have increased tenfold, allowing anilox roll producers to engrave faster. More important for the end-user, the pulse-to-pulse stability has improved, resulting in engravings that are more consistent.
Although there is no doubt that the conventional CO2 lasers will continue to improve, experiments were started a year ago with a completely different type of laser that does not use a gas (or gasses) such as carbon dioxide to create the laser energy. Instead, it uses a special type of ceramic crystal known as “YAG,” which stands for Yttrium Aluminum Garnet. This type of laser also is referred to as a solid state laser3. The key differences between this laser and the conventional CO2 lasers are the pulse shape and the wavelength.
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