A HIGH-ACCURACY FORMULA FOR FAST EVALUATION OF THE EFFECT OF FOCAL SHIFT

被引：14
|
作者：
LI, YJ
机构：
[1] R and D Department, Symbol Technologies Inc, Bohemia, NY, 11716-3300
来源：
JOURNAL OF MODERN OPTICS | 1991年 / 38卷 / 09期
关键词：
D O I：
10.1080/09500349114551921
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A simple formula for computing focal shifts in systems of different Fresnel numbers is proposed based on an analysis of factors that limit the extent of a focused field. This formula gives the focal shift accurately to about 2%, which is currently the best approximation that can be made.
引用
收藏
页码：1815 / 1819
页数：5
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