Abstract

The lensless shadow-casting technique for coded pattern processing usually accommodates two inputs at a time to perform desired logical operations in parallel. A method of binary encoding is proposed that can accommodate multiple input patterns for simultaneous processing. With the proposed multiple-input a carry-look-ahead technique of binary addition is developed that requires fewer processing steps encoding the conventional ripple-carry method. Experimental results for a few logic-processing operations than are included to establish the validity of the proposed technique.

© 1994 Optical Society of America

Implementation of trinary logic in a polarization encoded optical shadow-casting scheme

Rizwan A. Rizvi, K. Zaheer, and M. Suhail Zubairy
Appl. Opt. 30(8) 936-942 (1991)

Polarization-encoded optical shadow-casting arithmetic-logic-unit design: separate and simultaneous output generation

Jamal U. Ahmed and Abdul Ahad S. Awwal
Appl. Opt. 31(26) 5622-5631 (1992)

Polarization-encoded optical shadow-casting scheme: design of multioutput trinary combinational logic units

Abdul Ahad S. Awwal, Mohammad A. Karim, and Abdallah K. Cherri
Appl. Opt. 26(22) 4814-4818 (1987)

Separate and simultaneous generation of multioutputs in a polarization-encoded optical shadow-casting scheme: design of half- and full adders and subtractors

Rizwan A. Rizvi, K. Zaheer, and M. Suhail Zubairy
Appl. Opt. 27(24) 5176-5180 (1988)

Associative polarization-encoded optical shadow casting: gray-level image encoding for serial and parallel operations

Abdul Ahad S. Awwal and Mohammad A. Karim
Appl. Opt. 28(2) 284-290 (1989)