偏心环状干涉条纹对成像的影响
Investigation of the influence of departure to circular fringes imaging
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摘要: 讨论了由激光束生成的环状干涉条纹用于目标成像的原理和使用匹配滤波器的处理方法，推导得出相应的点扩展函数(PSF)。模拟计算了主旁瓣峰值比和偏心量与相位量的关系，分析了偏心量对成像质量的影响。结果表明，适当的偏心量有利于提高环状干涉条纹成像的分辨率，又不致于产生对点扩展函数有影响的旁瓣。Abstract: This paper discusses the principle of imaging with circular interference fringes and the processing method with matched filter, it also calculated the point spread function. It gives two digital relations by simulation: between the mainside lobe ratio and the phase, and between the departure and the phase. The conclusion is that suitable departure helps to improve the resolution of the imaging, and not to bring any unreasonable side lobe that influences the point spread function.
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Key words:
- interference fringe /
- return signal /
- imaging /
- departure /
- point spread function
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