Properties of holographic associative memory prepared by the polarization encoding process

Seok Ho Song; Sang Soo Lee

doi:10.1364/AO.27.003149

Applied Optics
Vol. 27,
Issue 15,
pp. 3149-3154
(1988)
•https://doi.org/10.1364/AO.27.003149

Properties of holographic associative memory prepared by the polarization encoding process

Seok Ho Song and Sang Soo Lee

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Seok Ho Song and Sang Soo Lee, "Properties of holographic associative memory prepared by the polarization encoding process," Appl. Opt. 27, 3149-3154 (1988)

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Abstract

A new holographic associative memory (HAM) using optical polarization is proposed. Picture elements (pixels) of binary objects are encoded with two mutually perpendicular states of linear polarization, and they are stored in the HAM using a lensless diffuser system. Experimental results of recognizing various inputs are presented. Analytical expressions about the present HAM are derived, and results of computer simulation are also presented.

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HDIST	POLARIZATION CODED HAM				HOPFIELD MODEL

	EXPERIMENT		SIMULATION		SIMULATION

	b¹(ᄌ)	b²(○)	b¹(ᄌ)	b²(○)	b¹(ᄌ)	b²(○)

0	b¹	b²	b¹	b²	b¹	b²
1	b¹	b²	b¹	b²	b¹	b²
2	b¹	b²	b¹	b²	b¹	b²
3	b¹	b²	b¹	b²	b¹	b²
4	b¹	b²	b¹	b²	b¹	b²
5	b¹	b²	b¹	b²	b¹	b²
6	b¹	b²	b¹	b²	b¹	b²
7	b¹	b²	b¹	b²	b¹	b²
8	DIV	b²	b¹	b²	b¹	b²
9	b¹	DIV	b¹	b²	b¹	b²
10	DIV	”	DIV	DIV	DIV	DIV
11	”	”	”	”	”	”
12	”	”	”	”	”	”
13	”	”	”	”	”	”
14	${\bar{b}}^{1}$	”	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
15	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
16	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
17	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
18	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
19	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
20	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
21	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
22	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
23	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
24	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$
25	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$	${\bar{b}}^{1}$	${\bar{b}}^{2}$

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Applied Optics