| 摘要 |
A method of treating an expanse of phosphor material to remove selected spots which have interfering luminescent properties. The method consists of isolating and identifying spots or areas considered to be objectionable as regards the desired function of the particular phosphor, and then focusing a laser beam of selected wavelength at each spot whereupon the phosphor material absorbs the laser generated radiant energy to develop heat energy sufficient to effect vaporization of the spot of phosphor material.
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