Stereo-Lighting Reconstruction of Optical Scanning Holography

A novel technique of simultaneously recording of multiple digital holograms with different lightings is proposed. The technique is based on optical scanning holography (OSH). In OSH, the object is raster scanned by a heterodyne interference pattern, and a single-pixel detector is applied to detect the scattered light. Subsequently, a complex hologram is obtained by removing the carrier and conjugate term. Based on the principle of light-path-reversal, the detector in OSH is found to play the role of a light source in conventional digital holography. As a result, simultaneously recording of multiple master holograms with different lightings can be achieved by using multiple detectors located at different positions. In the stereo-lighting reconstruction, the holograms with different lightings are superimposed with a weighting to generate a fusion hologram. Various desired lighting effect can thus be produced by modifying the weighting of the master holograms. The proposed technique may find novel applications in holographic display and holographic metrology.