转一个光学设计论坛里的帖子 2B9i R
Q$3\ /mz
在光学设计中有人经常碰到这样的问题,光学镜头的指标中有两项对于畸变的要求 {C/L5cZ]J
i+)}aA
一个是DISTORTION,另一个是TV DISTORTION b\?7?g
Gin_E&%g
其中的TV 畸变很多人不知道它的含义,再此给大家提供以下信息供参考,看了之后TV 畸变的概念就很清楚了 t/d' ,Khg
_)zmIB(}m
Q&Z4r9+Z
$"sq4@N
What is distortion? ~MhgAC
Distortion is the ratio of the change between the center and edge areas of a captured image. Due to the aberration of the lens, the distortion is more noticeable at the edges of a captured image. There are two types of distortion: barrel distortion and pincushion distortion. The general rule is that when the absolute value of the distortion value is smaller, the lens offers higher accuracy. h6\3vfj^f
.0
s[{x
Calculating formula vv2vW=\
TV distortion (Dtv) = Δh/2h x 100 (%) $(@o$%d
A positive value of TV distortion indicates \K?(
pincushion distortion and a negative value Q e>i{:N
indicates barrel distortion.
':4}O#
r=~WMDCz@
原帖网址:http://www.opto-tech.com/read.php?tid-3086.html la\zaKC;>
[lNqT1%]