Contrast increasing by third-order nonlinear image processing: a numerical study for microscopic rectangular objects

被引：25

作者：

Boudebs, G ^{[1
]}

Chis, M ^{[1
]}

Monteil, A ^{[1
]}

机构：

[1] Univ Angers, Lab Proprietes Opt Mat & Applicat, CNRS, EP 130, F-49045 Angers 01, France

来源：

OPTICS COMMUNICATIONS | 1998年 / 150卷 / 1-6期

关键词：

D O I：

10.1016/S0030-4018(98)00037-6

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This study deals with the simulation of the image formation involved by using a nonlinear image processor composed of a nonlinear medium placed at the common focus of a 4-f system. A simple linear model is developed taking into account the third-order optical nonlinearity of the medium (in the general case of nonlinear absorption and dephasing) and the optical transfer function of the 4-f system. The simulated images through the system are given for phase and/or amplitude rectangular objects. Our model and its corresponding simulation lead to optimizing nonlinear parameters of the medium for this class of objects, whatever their transmittance is, in order to enhance the visibility in image processors. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：287 / 296

页数：10