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
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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