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中文摘要：
使用部分相干光的干涉定律,对部分相干光照明呈正方形对称四孔干涉仪的干涉场做了研究.结果表明,一定条件下,可出现完全相消干涉,并存在光强和光谱相干度的相位奇点.与二个、三个部分相干点源的干涉做了比较.对所得结果物理上可解释为：虽然四个点源是部分相干的,但从两个点源出射场之和与从另外两个点源出射场之和却可能是完全相关的.
英文摘要：
By using the interference law for partially coherent light,the interference in a four-pinhole interferometer with square symmetry illuminated by partially coherent light is studied.It is found that the complete destructive interference in the four-pinhole interferometer may appear,and there may exist phase singularities of intensity and spectral degree of coherence.A comparison with the interference of two and three partially coherent point sources is made and the results can be physically interpreted in such a way,that in spite of the partial coherence of four point sources,the sum of the fields emerging from two point sources may be fully correlated with the sum of the fields emerging from the other two point sources.
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