CAJ | 학술논문

从部分相干光的传输理论出发,研究了高斯-谢尔模型(GSM)光束通过光阑像散透镜传输轴上的光谱变化规律.结果表明,与光源光谱相比,高斯-谢尔模型(GSM)光束通过光阑像散透镜传输轴上光谱发生了中心频率的移动,这种现象被称为光谱位移.详细分析了透镜的像散、光束的空间相关性和光阑的截断参量对光谱变化的影响.数值计算表明,这些参量会对光谱移动产生比较大的作用.
종부분상간광적전수이론출발,연구료고사-사이모형(GSM)광속통과광란상산투경전수축상적광보변화규률.결과표명,여광원광보상비,고사-사이모형(GSM)광속통과광란상산투경전수축상광보발생료중심빈솔적이동,저충현상피칭위광보위이.상세분석료투경적상산、광속적공간상관성화광란적절단삼량대광보변화적영향.수치계산표명,저사삼량회대광보이동산생비교대적작용.
Based on the propagation law of partially coherent light, the spectral changes of Gaussian Schell-model (GSM) beams passing through an astigmatic aperture lens are studied. It is shown that as compared with the original spectrum of the source, the axial spectrum in the focused field shifts to lower or higher frequency, which is defined as a spectral shift. Thedependence of spectral shift of GSM beams on the astigmatism of the lens, spatial coherence of GSM beams and the aperture diffraction is investigated in detail. The numerical results show that these parameters affect the spectral shift noticeably. A comparison with the aberration-free case is made, and shows that the astigmatism affects the spectral behavior of GSM beams, the largerastigmatism results in larger spectral changes in general.