Method and apparatus for laser marking on finished glass disk media
First Claim
1. A laser marking apparatus for producing a visible protruding structure on the surface of a finished non-metallic substrate disk magnetic storage media, comprising:
- a CO2 laser generator for generating an output laser beam, wherein the output laser beam is calibrated by calibrating the first few command pulses of the output laser beam by applying a pulse-width compensation;
an attenuator disposed in the optical path of the laser beam from said first reflector for adjusting the beam intensity;
a beam modifying and energy stabilizing system disposed in the optical path of the laser beam from said second reflector, minimizing the fluctuation of the pulse energy, improving the quality of the laser beam from said second reflector and producing a desired beam spot size of the laser beam after being focused onto the disk surface;
a galvanometer disposed in the optical path of the laser beam from said modifying and stabilizing system for scanning and marking the disk; and
a handling system disposed in the optical path of the laser beam from said galvanometer for holding and transferring the disk during a marking process.
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Accused Products
Abstract
There is disclosed a laser marking apparatus that is able to form dome-shaped marks on a finished glass disk that are visible to naked eyes. The laser marking apparatus comprises a CO2 laser beam generator, a pulse calibration, a beam modifying and energy stabilizing system, an attenuator, a galvanometer, and a material handling unit. There is also disclosed a laser marking method that comprises calibrating the laser beam generated by the laser beam generator by pulse calibration, passing the calibrated laser beam from the laser generator through the attenuator and the beam modifying and energy stabilizing system, wherein the laser power can be selected, the laser mode can be improved, and the fluctuation of laser power from laser generator and optic path can be minimized, and directing the modified laser beam into the galvanometer, wherein the modified laser beam is directed by an x-y scanner and focused by F-Theta lens to the surface of a workpiece held by the materials handling unit.
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Citations
21 Claims
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1. A laser marking apparatus for producing a visible protruding structure on the surface of a finished non-metallic substrate disk magnetic storage media, comprising:
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a CO2 laser generator for generating an output laser beam, wherein the output laser beam is calibrated by calibrating the first few command pulses of the output laser beam by applying a pulse-width compensation;
an attenuator disposed in the optical path of the laser beam from said first reflector for adjusting the beam intensity;
a beam modifying and energy stabilizing system disposed in the optical path of the laser beam from said second reflector, minimizing the fluctuation of the pulse energy, improving the quality of the laser beam from said second reflector and producing a desired beam spot size of the laser beam after being focused onto the disk surface;
a galvanometer disposed in the optical path of the laser beam from said modifying and stabilizing system for scanning and marking the disk; and
a handling system disposed in the optical path of the laser beam from said galvanometer for holding and transferring the disk during a marking process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification