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Laser engraving can also be used to create works of fine art. Generally, this involves engraving into planar surfaces, to reveal lower levels of the surface or to create grooves and striations which can be filled with inks, glazes, or other materials. Some laser engravers have rotary attachments which can engrave around an object.
Because of the high power levels available (combined with reasonable cost for the laser), CO 2 lasers are frequently used in industrial applications for cutting and welding, while lower power level lasers are used for engraving. [8] In selective laser sintering, CO 2 lasers are used to fuse particles of plastic powder into parts.
The CO 2 laser is suited for cutting, boring, and engraving. The neodymium (Nd) and neodymium yttrium-aluminium-garnet lasers are identical in style and differ only in the application. Nd is used for boring and where high energy but low repetition are required. The Nd:YAG laser is used where very high power is needed and for boring and engraving.
Schematic diagram of a typical laser, showing the three major parts. A laser is constructed from three principal parts: An energy source (usually referred to as the pump or pump source), A gain medium or laser medium, and; Two or more mirrors that form an optical resonator.
Concentration of CO 2 can be measured by subjecting a sample to pulses of electromagnetic energy (such as from a distributed feedback laser [4]) that is tuned specifically to the absorption wavelength of CO 2. With each pulse of energy, the CO 2 molecules within the sample will absorb and generate pressure waves via the photoacoustic effect.
A Powerlet cartridge, commonly referred to as a CO 2 charger, is a small disposable metal gas cylinder holding 8–12 grams (0.28–0.42 oz) of liquid CO 2 and often a small quantity of lubricating oil, used as a pneumatic power source for certain air guns, airsoft guns, paintball guns, carbonation, and for quick inflation of various devices ...