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光栅玻璃的尺寸是15mmX15cmm,当我把第一个表面(OBJ)的2个参数改成thickness: infinity-15, semi-dimeter: infinity-6,出问题了， MTF下降的很厉害，怎么优化都回补到以前那个参数了，估计前面要添加一些镜头，哪位前辈帮我下阿！非常谢谢！</P><br /> <br /> <br /> <br /> </div> <div class="postmsg"><br /> <br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>当然变化很厉害，你没考虑景深问题。</P><br /> <br /> <br /> <br /> </div> <div class="postmsg"><br /> <br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>我觉得吧。。这个设计用双高斯有点浪费。。。</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>F/#只有6.35...全视场也就20度左右。。。视场并不大</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>还有设计时物距无穷。。f为95mm。。</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>为什么用这么长焦距的镜头看一个物距为10mm的光栅。。。。</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>不知道你这个是干什么用的。</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>想问一下这个设计的初衷。</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>谢谢。</P><br /> <br /> <br /> <br /> </div> <div class="postmsg"><br /> <br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>多谢前辈的提醒，我想设计一个条纹光栅投影系统，就是把条纹（要求为50条/mm光栅,大小为15mmx15mm）投影到20mmx20mm的平面上而已，我刚学光学设计，以前一直是做图像处理的，被抓来干这活，我采用这个设计双高斯的原因是它提供的视场很大，但开始没有考虑发光物（光栅）的放置，所以就出这个问题了，请前辈多指教！</P><br /> <br /> <br /> <br /> </div> <div class="postmsg"><br /> <br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>焦距小一点吧 30~40mm左右.OBJ infinity 设计再调调焦。</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>或者直接输入个物距设计。</P><br /> <br /> <br /> <br /> </div> <div class="postmsg">物距可以不用无穷远吧．用三片玻璃就可能达到．</div> <div style="height200px;"></div> </div> </div> </div> </div></div> </div> <!--autocomment last=2025-12-18 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