Three-dimensional image processing and optical scanning holography

Abstract

Publisher Summary This chapter discusses optical scanning holography (OSH) through the development of a two-pupil optical heterodyne scanning image processor. To gain some perspectives and insights into scanning holography, first, a 3D imaging theory is developed for the two-pupil optical heterodyne scanning image processor to show that the 3D imaging properties of the processor can be expressed in terms of the two pupils in the system. The theory is applicable to dilute transparent 3D objects or diffusely reflecting surfaces without shadowing or vignetting. The processor is used to process 3D objects coherently or incoherently, depending on the detection scheme used. The chapter discusses the way the two pupils in the optical system should be modified to obtain holographic recording by active optical scanning. This technique to record holographic information in real time is now called optical scanning holography. The so-called sine- and cosine-FZP hologram is introduced and it is shown that a complex hologram can be formed by using these two holograms to reject the well-known twin image noise in holography. The chapter illustrates one of its important 3D imaging examples in OSH, and describes that two reconstructions can be obtained corresponding to the real and pseudoscopic reconstructions of a conventional hologram.