Patent ID: 6734389
Filing Date: 2004-05-11
Classification: B23K,B44B

Abstract:
An apparatus for producing high quality laser-induced images inside optically transparent materials by controlling breakdown process development and space structure of laser radiation comprising:main laser beam having a main energy level which exceeds an energy threshold for causing a breakdown of the material; a divider for dividing said main laser beam into two separate second and fourth laser beams, said second beam having an energy level sufficiently high to cause damage in said material, said fourth beam having an energy level sufficiently high to support a plasma condition; means for directing said second beam into an optical system which forms a pattern of a laser output at a focus point inside said material; at least one time delay mechanism; means for directing said fourth beam to said at least one time delay mechanism and then to said optical system for directing at said same focus point inside said material at a time later than said second beam.