Aberration compensation in digital holographic reconstruction of microscopic objects

We present a digital method for the compensation of the aberrations appeari ng when a lensless hologram of a microscopic object is reconstructed. The d igital hologram of the microscopic object is recorded on a relatively low r esolution device (CCD sensor). An expansion of the hologram by interpolatio n of the recorded intensity is performed in order to increase the number of pixels. For digital reconstruction of the wavefronts the the expanded holo gram is multiplied by the reference wale followed by simulation of the diff raction using the Rayleigh-Sommerfeld propagation relation. Experimental re sults are presented.