Application of knife-edge technique to measurement of spatial structure of focusing spot

作者：Wei Jun; Wang Sicong; Yang Liangxin; Xie Xiangsheng^*; Zhou Jianying

来源：High Power Laser and Particle Beams, 2014, 26(1).

DOI：10.3788/HPLPB201426.011014

• Basic principles
• Investigation and analysis
• Knife-edge techniques
• Light-distribution measurements
• Noise
• Spatial structure
• Spot
• Spot measurements

An investigation and analysis of two methods, the multi-angle knife-edge method and the right-angle double-knife-edge method, was demonstrated for the light distribution measurement. The basic principles of the two methods were introduced. Their ability of image reconstruction and anti-noise was analyzed by numerical simulation. The experimental result of the spot measurement with the right-angle double-knife-edge method was showed. As a conclusion, compared with the multi-angle scanning knife-edge method, the double-knife-edge method was more practical for focal spot measurement, especially for the tightly focusing spot.

• 出版日期2014
• 单位中山大学