Abstract: The precision focusing and diagnosis experimental system for laser beams in ICF target chamber is introduced in the paper. The experimental system consists of laser source, precision focusing facility with harmonic-step driver aspherical focusing lens, simulated optical fiber planar target, CCD cameras and image acquisition and processing unit. The system is controlled by computer. The experimental results shows that, the error of this focusing and diagnosis system is less than 15 $mu@m, the system meets to the technical needs of precision focusing laser beam sin ICF target chamber. !0
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