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Principle of Crystal Laser Engraving Process

Aug 28, 2020

       Laser engraving is based on numerical control technology, with laser as the processing medium. The processing material melts and vaporizes instantly under the irradiation of laser engraving, so as to achieve the purpose of engraving processing.

    When it comes to crafts made by laser, the first thing I think of is the inner crystal carving. The outside of the crystal is smooth and hard, without any gaps. How is the internal pattern made?

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    In fact, most of the crafts commonly seen are not real crystals, but artificial crystals. "Laser" is the most useful tool for "internal carving" of man-made crystals (also called "crystal glass"). Using laser engraving technology, the plane or three-dimensional pattern is "carved" in the crystal glass.

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    These glass and crystal handicrafts are made with a computer-controlled laser engraving machine. The laser machine injects a certain wavelength of laser light into the glass or crystal, causing the specific part of the inside to burst into bubbles to form a predetermined shape.

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     For laser engraving glass, its energy density must be greater than a certain critical value, or threshold value, to destroy the glass, and the energy density of the laser somewhere is related to the size of its spot at that point. The same laser, the smaller the spot The greater the energy density produced. Through proper focusing, the energy density of the laser can be lower than the glass damage threshold before reaching the processing area, and exceed this critical value in the area that you want to process. The laser generates pulses in a very short time, and its energy can instantaneously heat and break the crystal, resulting in extremely small white spots, and a predetermined shape is carved into the glass.