Patent ID: 9110443
Filing Date: 2015-08-18
Classification: G01B,G03H

Abstract:
1. An apparatus to record a hologram in a shear-corrected manner comprising: an illumination source configured to produce a first beam of light; an object to be recorded; a beamsplitter configured to split the first beam into a reference beam, and an object illumination beam which interacts with said object; a focusing element configured to focus at a focal plane a portion of the object illumination beam which has interacted with said object; a phase shifting and shear-correcting optical element in the reference beam path only configured to correct the shear in the reference beam, impart a phase shift to the reference beam, and send the phase-shifted and shear-corrected reference beam to the focal plane so that the phase-shifted and shear-corrected reference beam substantially completely overlaps the object illumination beam at the focal plane; and an electronic digital recorder positioned substantially at the focal plane and configured to record a spatially heterodyne hologram formed by the phase-shifted and shear-corrected reference beam and the focused portion of the object illumination beam.