Method and apparatus for laser engraving diamonds with permanent

Details Method and apparatus for laser engraving diamonds with permanent Method and apparatus for laser engraving diamonds with permanent

1983-01-03

1984-08-21

Albritton, C. L.

Electric heating

Metal heating

By arc

219121LJ, B23K 2700

Patent

active

044671725

ABSTRACT:
A laser system for inscribing permanent identification markings on or below the surface of a diamond. A shallow penetration depth and narrow line width is achieved by using a harmonic conversion device to produce an output frequency which is the second harmonic of the fundamental laser frequency in combination with a lens system having a short focal length to provide a high density pinpoint spot of laser energy. The energy intensity can be further regulated by a polarization attenuator. In operation, the diamond is mounted on a movable support structure which insures proper relationship to the laser beam. The process is activated by a computer which supplies positional commands to the movable support and is interfaced with the laser for generating programmed alpha-numeric sequences.

REFERENCES:
patent: 2351932 (1944-06-01), Deckel et al.
patent: 3407364 (1968-10-01), Turner
patent: 3527198 (1970-09-01), Takaoka
patent: 3622739 (1971-11-01), Steffen
patent: 3775586 (1973-11-01), Flint et al.
patent: 4048515 (1977-09-01), Liv

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