liufukui 发表于 2004-6-8 18:46:00

[求助]工作距离能大于焦距吗



请指点



huanglin 发表于 2004-6-8 18:55:00



为什么不可以,主面位置不可以在最后的镜片后面吗!
[此贴子已经被作者于2004-6-9 11:31:48编辑过]



qhw 发表于 2004-6-8 19:45:00



sure № problem



小马过河 发表于 2004-6-8 19:48:00

<img src="data/attachment/forum/dvbbs/2004-6/200468114814724.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'data/attachment/forum/dvbbs/2004-6/200468114814724.gif\');}" onmousewheel="return imgzoom(this);" alt="" />

johncai 发表于 2004-6-8 20:36:00



说得对!



ASS 发表于 2004-6-9 05:49:00



<P>没有问题,我都设计过,看你对相差的要求了,</P>



liufukui 发表于 2004-6-9 21:53:00

回复:(ASS)没有问题,我都设计过,看你对相差的要求...

<P>一般情况下工作距离比焦距大多少时像差还可以接受?</P>
<P>我最大做到20mm,再大就不能接受了</P>
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