04467172 is referenced by 62 patents and cites 8 patents.

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.

Title
Method and apparatus for laser engraving diamonds with permanent identification markings
Application Number
6/455329
Publication Number
4467172
Application Date
January 3, 1983
Publication Date
August 21, 1984
Inventor
Carl B Miller Jr
Saddle Brook
NJ, US
Jerry Ehrenwald
4001 Judith La., Oceanside, 11572
NY, US
Agent
Natter & Natter
Assignee
Jerry Ehrenwald
NY, US
IPC
B23K 27/00
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