ABSTRACT
As I explained in Chapter 4, if you make a hologram and illuminate it with the conjugate of the original reference beam, the diffracted beam will form a real image occupying the precise position of the original object. When you view this aerial image you see it, in effect, from behind, so that it is pseudoscopic (i.e. has reversed perspective). In other respects it is the same as the image of an object formed by a convex lens situated at twice its focal length from the object (Fig. 12.1). You can make a hologram using either type of image as the object. When you make it from the image formed by a lens it is called a focused-image hologram, and Chapter 14 explains how to make this. A hologram made from a holographic real image is called an image hologram, and is the subject of this chapter.
