Page 576 - Introduction to Information Optics

9.7. Summary 561

(a)

(c)

Fig. 9.30. Experimental result corresponding to the numerical example in Sec. 9.4.5 [162]. (a)
Output I of W, (b) Output T of W, The relative combination generates the W result OToTlOlTO and
OTTl 1000. (c) Output 1 of T, (d) Output T of T. The relative combination generates the T result
TllllillO and ITOlOOTlO. (e) Output of 1 of the_su_m and difference, (f) Output of T_of the sum
and difference. A combination generates the final TlIOOlOOO and the final difference TTTOl iTlO.

algorithms and the architectures proposed. By exploiting the redundancy of
signed-digit number systems, addition, subtraction, multiplication, division,
and other complex arithmetic operations can be completed in fixed steps
independent of the operand length. The table look-up, content-addressable
memory, symbolic substitution, and parallel logic array approaches to optical
computing can effectively exploit the benefits of optics in parallel information