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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 `G qe]ZE#"
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一个是DISTORTION,另一个是TV DISTORTION 7q+D}+ Xf
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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 +4s]#{mP
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What is distortion? hm,{C
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. :~otzI4%!
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Calculating formula D5,]E`jwu
TV distortion (Dtv) = Δh/2h x 100 (%) {Rkd;`Q`!
A positive value of TV distortion indicates z:>cQUYl
pincushion distortion and a negative value 17 Ugz?
indicates barrel distortion. ,AP0*Ln
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原帖网址:http://www.opto-tech.com/read.php?tid-3086.html vN Bg&m
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