Improving the implementation of layered reconstruction of 3D field by digital holography

The paper briefly reviews the principles of electronic recording and reconstruction of an optical hologram, and then gives a design of an experimental setup to record the optical hologram of 3D field directly on the small photosensitive chips of a CCD (charge coupled device) array, thus obtaining a series of layered reconstructions of a 3D field. Based on this, some effective ways for completely separating and intercepting the spatial spectrum of an object are discussed, and a new way for improving the bandwidth of the spatial spectrum of a holographic reconstruction by double reference beams is proposed. It is indicated that digital holography and the improved method can be effective for measuring the dynamic changes of a 3D field in real time.