Introduction to Holography, 2nd Edition

13 Digital Holography

DOI: 10.1201/9781003155416-17

13.1 Introduction

The idea of using a CCD camera to record holograms is obviously very attractive since it then becomes possible to avoid all forms of physical or chemical processing of recording materials, and many holograms can be recorded per second. The photosensitive elements in the CCD array are regularly spaced in orthogonal directions, with space between them in which no light is detected. Each element of the array provides a sample of the intensity of the light pattern produced by the interference of the object and reference waves. The samples are digitised and stored in a computer as a digital hologram. We reconstruct the image by calculating the result obtained when the digital ...