Hematite engraving
OwnerKristy J. Holtzinventor
Life of this patent
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Abstract
In a process of engraving a bead of hematite (Fe2O3) in the form of specularite, a crystalline form with bright metallic luster, a pulsed laser beam is focused on the bead. The beam has a width of 0.005 to 0.006 inches, a wavelength of about 1064 nm and an intensity of 60 to 90 watts of power. The pulse rate is on the order of 2000 per second. The beam is moved in a controlled pattern to produce the desired engraving. Preferably the beam is moved at about 1.0 to 1.5 inches per second.
Claims4
The process of engraving a channel in a specular hematite bead comprising, focusing on said bead a pulsed laser beam with a beam width of 0.005 to 0.006 inches, a wave length of about 1064 nm at an intensity of 60 to 90 watts of power and a pulse rate on the order of 2000 pulses per second, and moving said beam in a controlled pattern.
Dependencies are inferred from the claim text.