Optical scanning holography for three-dimensional imaging

In this paper we introduce a digital holographic technique called optical scanning holography (OSH). In OSH, the object to be measured is raster scanned by a pre-generated time-varying interference pattern. In addition, a single-pixel detector instead of an arrayed detector is used to acquire the hologram data. By using heterodyne technique in conjunction with synchronous demodulation, a complex hologram free of twin image and zeroth-order term can be generated. We will demonstrate some experimental results and show that OSH is a promising technique to acquiring a large-size and high resolution digital hologram without speckle noise. Therefore, OSH is a potential technique for accurate contouring of a 3D object.