Design and Application of Laser Far-field Divergence Angle Measurement System Based on Knife-edge Method
Far-filed divergence angle is an important index to evaluate the comprehensive performance of laser.According to the principle of measuring divergence angle by focusing lens method,a highly integrated portable measurement system for far-field divergence angle of large aperture and high energy laser is designed.The system uses knife-edge method to measure the waist diame-ter of laser beam,and then obtains the measurement result directly by software.The practical test shows that the system can accu-rately measure the divergence angle of laser far-field,and the measurement accuracy is better than 2%.
laserknife-edgefar-field divergencemeasuring system
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