转一个光学设计论坛里的帖子 J[ 0o6
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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 1V/?p<A
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一个是DISTORTION,另一个是TV DISTORTION Sr Vo0$5)
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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 ZH<:g6
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What is distortion? V7~tIhuJH
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. IZ2(F,{o
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Calculating formula ^\"@r%|
TV distortion (Dtv) = Δh/2h x 100 (%) 41^ =z[k
A positive value of TV distortion indicates z:gp\
pincushion distortion and a negative value HgY [Q}7s
indicates barrel distortion. VAD9mS^~
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原帖网址:http://www.opto-tech.com/read.php?tid-3086.html Q3h_4{w
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