转一个光学设计论坛里的帖子 iF0a
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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 +,[3a%c)H
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一个是DISTORTION,另一个是TV DISTORTION ]~zJ7I
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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 )eEvyU
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What is distortion? 8?YW i
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. 9c^EoYpy-
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Calculating formula !VHIl&Mos
TV distortion (Dtv) = Δh/2h x 100 (%) HH#i.s2
A positive value of TV distortion indicates \k=Qq(=
pincushion distortion and a negative value GN9_ZlC
indicates barrel distortion. 2P
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原帖网址:http://www.opto-tech.com/read.php?tid-3086.html I`TD*D
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