  We have demonstrated the capability of spectral multiplexing in
multi-distance diffractive imaging, enabling the reconstruction of samples with
diverse spectral responses. While previous methods like ptychography utilize
redundancy in radial diffraction data to achieve information multiplexing, they
typically require capturing a substantial amount of diffraction data. In
contrast, our approach effectively harnesses the redundancy information in
axial diffraction data. This significantly reduces the amount of diffraction
data required and relaxes the stringent requirements on optical path stability.
