The crystal crafts are made by a laser inner engraving machine controlled by a computer. The crystal crafts we usually see are mainly artificial crystals. Laser internal engraving machine is the most practical and valuable tool for "internal engraving" of artificial crystal. Using laser engraving technology, two-dimensional or three-dimensional patterns are "carved" inside the crystal to form an image.
Looking carefully, there are no openings for "carving knives" to enter and exit around these crystal engraved crafts. In this regard, lasers are more sophisticated than magicians, and magicians must have props if they want to make things. What? The principle of laser engraving is actually very simple. If you want to use laser to engrave glass, first of all, the energy density of the laser must be greater than a certain critical value, or threshold, to destroy the glass, and the energy density of the laser somewhere is related to its spot at that point. The size is related to the same laser, the smaller the spot, the greater the energy density.