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Improving resolution by the higher-order microscope imaging system with thermal light

The resolution properties of the higher-order ghost imaging with thermal light source are investigated. In a multi-arm microscope imaging scheme with thermal light, we compare the resolution of the images obtained by the higher-order correlation with that by the lower-order correlation, and show that the resolution of the images can be enhanced with an increasing number of the reference arms. The effects from the aperture of the reference lens are also discussed.