Experiment research of accurate wavefront reconstruction of digital holography

In order to obtain accurate wavefront reconstruction field of digital holography, theoretical analysis and experiments of common wavefront reconstruction algorithms were made. Equivalent distance of light wave propagating through single medium was obtained. The related parameters commonly used in wavefront reconstruction formula were modified by using equivalent distance. The results of reconstruction of digital hologram with Collins formula and with equivalent distance were compared and analyzed. It was found that when light passing through non single medium, accurate digital holographic image could be obtained by reconstruction formula using Collins formula or equivalent distance correction. The results show that the results of wavefront reconstruction using equivalent distance of digital hologram are consistent with the results obtained by Collins formula reconstruction. This method can be used to simplify wavefront reconstruction of digital hologram when light wave passes through single medium. The results provide useful reference for microscopic digital holography and application of digital holography detection.