Rectangular Internally Mosaicked Coded Apertures
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
In a sequence of recent articles [1,2] we have shown how coded aperture masks with a simple structure can be designed so that they have the desirable decoding properties of uniformly redundant arrays. In this article a further generalization of these concepts is given to provide an even more flexible design mechanism for such masks. We consider an (n, m, s, t) mask, as shown in Fig. 1, where the unit entries indicate an open (transparent) area, and the zero entries correspond to closed (opaque) regions. A mask can thus be regarded as a binary array. Notice that this structure exists for s, a factor of n, and t, a factor of m. For such a mask A the required decoding array structure G can be shown to have the form of that in Fig. 2. This array has the property that A*G = WG.