帮忙看看6-60变焦的结果
<img src="data/attachment/forum/dvbbs/2005-1/200512220315341.jpg" 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/2005-1/200512220315341.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="data/attachment/forum/dvbbs/2005-1/200512220321468.jpg" 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/2005-1/200512220321468.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="data/attachment/forum/dvbbs/2005-1/2005122203226197.jpg" 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/2005-1/2005122203226197.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="data/attachment/forum/dvbbs/2005-1/2005122203240376.jpg" 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/2005-1/2005122203240376.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
你给的曲线太那个了吧，有谁看得出． 另不知你的这个是做什么用的．只有ＭＴＦ曲线也是不够的．
<P>哦，一般的监视镜头，那需要提供那些指标可以给出评价，帮忙指点啊</P>
<P>你将MTF频率设小点</P>
你把频率设置到80/MM左右,我们才能看清楚,并大相差看这个好象不能完全确定的.看你后面CCD的象素的大小,最好RSM半径不大于一个象素的直径.
各图对应的视场、口径及焦距？
先看看MTF<img src="data/attachment/forum/dvbbs/2005-1/2005124181356789.jpg" 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/2005-1/2005124181356789.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="data/attachment/forum/dvbbs/2005-1/200512418148800.jpg" 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/2005-1/200512418148800.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="data/attachment/forum/dvbbs/2005-1/2005124181421437.jpg" 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/2005-1/2005124181421437.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="data/attachment/forum/dvbbs/2005-1/2005124181437280.jpg" 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/2005-1/2005124181437280.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
F#=1.6~2.8 <P>从这图上看的话，第二个可以用</P> 只是MTF圖是不夠的吧，其他的象差圖呢？2D圖？ 如此大的变焦，给ccd用的，分辨率到100lp/mm应该够了吧。 <P>只是一般监视镜头用的,如果还需要象差图我改天传上来,还请各位指点一二.</P> 一般来说50线对的空间频率足已，还有就是设置多重配置(multi configuration), 视场用像面尺寸来定，不是用入射角度，这样的话不管如何变焦，像面尺寸都是一样的，像你这样，每个都重新算，太麻烦啦，不过从设计结果来看，光学系统的分辨率足够啦，50lp/mm处的MTF在0.5左右，考虑光学系统的加工装调误差和CCD本身的MTF，最后的MTF达到0.2以上不成问题。
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