转一个光学设计论坛里的帖子 Mrk3r/
8w
UUfM7gq
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 bji#ID2]%
/rZk^/'
一个是DISTORTION,另一个是TV DISTORTION u;9iuc`*
PJZ;wqTD_
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 0 8L;u7u
"}_J"%
}'Ap@4
H'3
pHb
What is distortion? (DvPdOT+3
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. vx?KenO}
'G65zz
Calculating formula E&J<qTH9
TV distortion (Dtv) = Δh/2h x 100 (%) #6c,_!
A positive value of TV distortion indicates
6xx.Z3v
pincushion distortion and a negative value :i>LESJq
indicates barrel distortion. 0Lj;t/mG
iWeUsS%zpV
原帖网址:http://www.opto-tech.com/read.php?tid-3086.html b&!}SZ
o%+w:u.