Patent ID: 7495191

Claim:
A laser treatment apparatus configured for treating a workpiece, comprising: a first laser generation device configured for generating a first laser beam having a first wavelength; a first optical assembly configured for directing the first laser beam onto a first target of the workpiece, the first target having an absorption wavelength matching with the first wavelength; a second laser generation device configured for generating a second laser beam, the second laser beam having has a second wavelength different from the first wavelength; a second optical assembly configured for directing the second laser beam onto a second target of the workpiece, the second target having an absorption wavelength matching with the second wavelength; a third laser generation device configured for generating a third laser beam to selectably strike onto one of the first target and the second target of the workpiece; and an optical detection device configured for detecting a reflection part of the third laser beam reflected from the workpiece and for outputting a monitoring signal based upon the detected reflection part of the third laser beam; wherein the at least one of the first optical assembly and the second optical assembly comprises a focusing lens, a blocking shutter configured for adjusting a spot size of a corresponding laser beam before being incident onto the corresponding one of the focusing lens of the first optical assembly and the focusing lens of the second optical assembly, and a deflection assembly interposed between the blocking shutter and the focusing lens, the deflection assembly, along a direction oriented from the blocking shutter to the focusing lens, comprising another focusing lens, a first deflecting member, a converging lens, and a second deflecting member, the deflecting assembly being configured for deflecting a propagation direction of the corresponding laser beam and guiding the corresponding laser beam to strike on the corresponding one of the focusing lens of the first optical assembly and the focusing lens of the second optical assembly.