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color="#000000"></font></div><br /> <div align="center"><font color="#000000"></font></div><br /> <div align="center"><font color="#000000"></font></div><br /> <div align="center"><font color="#000000"></font></div><br /> <div align="center"><font color="#000000"></font></div><br /> <div align="center"><font color="#000000"><strong><font face="宋体"><font style="font-size:14pt">光学设计中的公差概念</font></font></strong><strong><font style="font-size:14pt"></font></strong></font></div><br /> <div align="center"><strong><font style="font-size:14pt"><font face="Times New Roman"><font color="#000000">Jason Han</font></font></font></strong></div><br /> <font size="3"><font color="#000000"><strong><font face="宋体"> 性能合理镜头的首选公差</font></strong><font face="Times New Roman">[1]</font></font></font><br /> <table cellspacing="0" class="t_table" ><tr><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">参数</font></font></font></strong><br /> </td><td width="153"><strong><font size="3"><font color="#000000"><font face="宋体">公差</font></font></font></strong><br /> </td><td width="131"><strong><font size="3"><font color="#000000"><font face="宋体">参数</font></font></font></strong><br /> </td><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">公差</font></font></font></strong><br /> </td></tr><tr><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">半径</font></font></font></strong><br /> </td><td width="153"><strong><font face="宋体"><font size="3"><font color="#000000">±</font></font></font><font face="Times New Roman"><font size="3"><font color="#000000">0.001mm<br /> </font></font></font></strong><strong><font size="3"><font color="#000000"><font face="宋体">样板的测量精度</font></font></font></strong><br /> </td><td width="131"><strong><font size="3"><font color="#000000"><font face="宋体">倾斜</font></font></font></strong><br /> </td><td width="142"><font face="Times New Roman"><font size="3"><font color="#000000"><strong>0.05mm</strong><strong> TIR</strong></font></font></font><br /> </td></tr><tr><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">对样板的光焦匹配</font></font></font></strong><br /> </td><td width="153"><font size="3"><font color="#000000"><strong><font face="Times New Roman">3</font></strong><strong><font face="宋体">个光圈</font></strong></font></font><br /> </td><td width="131"><strong><font size="3"><font color="#000000"><font face="宋体">偏心</font></font></font></strong><br /> </td><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">±</font><font face="Times New Roman">0.05mm</font></font></font></strong><br /> </td></tr><tr><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">表面不规则度</font></font></font></strong><br /> </td><td width="153"><font size="3"><font color="#000000"><strong><font face="Times New Roman">1</font></strong><strong><font face="宋体">个光圈（</font><font face="Times New Roman">0.3</font></strong><strong><font face="宋体">）</font></strong></font></font><br /> </td><td width="131"><strong><font size="3"><font color="#000000"><font face="宋体">折射率</font></font></font></strong><br /> </td><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">±</font><font face="Times New Roman">0.001</font></font></font></strong><br /> </td></tr><tr><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">厚度</font></font></font></strong><br /> </td><td width="153"><strong><font size="3"><font color="#000000"><font face="宋体">±</font><font face="Times New Roman">0.05mm</font></font></font></strong><br /> </td><td width="131"><strong><font size="3"><font color="#000000"><font face="宋体">阿贝数</font></font></font></strong><br /> </td><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">±</font><font face="Times New Roman">0.8%</font></font></font></strong><br /> </td></tr><tr><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">空气间隔</font></font></font></strong><br /> </td><td width="153"><strong><font size="3"><font color="#000000"><font face="宋体">±</font><font face="Times New Roman">0.05mm</font></font></font></strong><br /> </td><td width="131"><strong><font size="3"><font color="#000000"><font face="宋体">玻璃不均匀性</font></font></font></strong><br /> </td><td width="142"><strong><font size="3"><font color="#000000"><font face="宋体">±</font><font face="Times New Roman">0.0001</font></font></font></strong><br /> </td></tr><tr><td width="142"><font size="3"><font color="#000000"><strong><font face="宋体">楔角</font><font face="Times New Roman">/</font></strong><strong><font face="宋体">同心度</font></strong></font></font><br /> </td><td width="153"><font face="Times New Roman"><font size="3"><font color="#000000"><strong>0.025mm</strong><strong> TIR</strong></font></font></font><br /> </td><td width="131"><strong><font face="Times New Roman"><font size="3"><font color="#000000"></font></font></font></strong><br /> </td><td width="142"><strong><font face="Times New Roman"><font size="3"><font color="#000000"></font></font></font></strong><br /> </td></tr></table><strong><font face="Times New Roman"><font size="3"><font color="#000000"></font></font></font></strong><br /> <font size="3"><font color="#000000"><strong><font face="Times New Roman">1</font></strong><strong><font face="宋体">、</font><font face="Times New Roman">radius(</font></strong><strong><font face="宋体">半径</font><font face="Times New Roman">)---</font></strong><strong><font face="宋体">样板精度</font></strong></font></font><br /> <font face="宋体"><font size="3"><font color="#000000">实际上是指样板的检测精度，光学设计师应该与光学加工师沟通。</font></font></font><br /> <font size="3"><font color="#000000"><strong><font face="Times New Roman">2</font></strong><strong><font face="宋体">、对样板的光焦匹配</font><font face="Times New Roman">---fringes</font></strong><strong><font face="宋体">（光圈）</font></strong></font></font><br /> <font size="3"><font color="#000000"><font face="宋体">一个光圈相当于</font><font face="Times New Roman">1/2</font><font face="宋体">波长的矢高所对应半径的变化，普通的光学加工一般控制在</font><font face="Times New Roman">5</font><font face="宋体">个光圈，较好的精度应该控制在</font><font face="Times New Roman">3</font><font face="宋体">个光圈以内。</font></font></font><br /> <font size="3"><font color="#000000"><font face="宋体">关系式：</font><font face="Times New Roman">?Z=</font><font face="宋体">（λ</font><font face="Times New Roman">/2</font><font face="宋体">）·</font><font face="Times New Roman">N</font></font></font><br /> <font size="3"><font color="#000000"><strong><font face="Times New Roman">3</font></strong><strong><font face="宋体">、</font><font face="Times New Roman">irregular</font></strong><strong><font face="宋体">（表面不规则度）</font></strong></font></font><br /> <font size="3"><font color="#000000"><font face="宋体">表面不规则度可以通过局部光圈来考察，工艺上可以做到</font><font face="Times New Roman">0.3</font><font face="宋体">个光圈。</font></font></font><br /> <font size="3"><font color="#000000"><strong><font face="Times New Roman">4</font></strong><strong><font face="宋体">、</font><font face="Times New Roman">thickness</font></strong><strong><font face="宋体">（厚度</font><font face="Times New Roman">/</font></strong><strong><font face="宋体">间隔）</font></strong></font></font><br /> <font face="宋体"><font size="3"><font color="#000000">包括光学元件的厚度和机械元件支撑的间隔。</font></font></font><br /> <font size="3"><font color="#000000"><font face="宋体">在使用</font><font face="Times New Roman">ZEMAX</font><font face="宋体">软件模拟公差时，公差操作数</font><font face="Times New Roman">TTHI</font><font face="宋体">有两个参数，</font><font face="Times New Roman">int1</font><font face="宋体">是用来被定义公差的表面编号，而</font><font face="Times New Roman">int2</font><font face="宋体">是作为补偿的表面编号，最小值和最大值是以镜头长度单位表示的极值偏差。</font></font></font><br /> <font size="3"><font color="#000000"><font face="宋体">举例说明，假设一个镜头，它的表面</font><font face="黑体">3 </font><font face="宋体">是</font><font face="黑体">BK7</font><font face="宋体">，表面</font><font face="黑体">4 </font><font face="宋体">是</font><font face="黑体">F2</font><font face="宋体">，表面</font><font face="黑体">5 </font><font face="宋体">是空气。名义厚度分别是</font><font face="黑体">3</font><font face="宋体">、</font><font face="黑体">4</font><font face="宋体">、和</font><font face="黑体">6mm</font><font face="宋体">。如果默认的公差法则为表面</font><font face="黑体">3 </font><font face="宋体">定义一个</font><font face="黑体">TTHI </font><font face="宋体">操作数，则将在表面</font><font face="黑体">5 </font><font face="宋体">上放一个补偿。如果这个公差值为</font><font face="黑体">+.1mm</font><font face="宋体">，则在分析过程中，它们的厚度分别变成</font><font face="黑体">3.1mm</font><font face="宋体">、</font><font face="黑体">4.0mm</font><font face="宋体">、和</font><font face="黑体">5.9mm</font><font face="宋体">。这样，从表面</font><font face="黑体">6 </font><font face="宋体">到象面的表面的绝对位置将不受表面</font><font face="黑体">3 </font><font face="宋体">的厚变化的影响。</font><font face="Times New Roman">[2]</font></font></font><br /> <font face="Times New Roman"><font size="3"><font color="#000000"></font></font></font><br /> <font size="3"><font color="#000000"><strong><font face="Times New Roman">5</font></strong><strong><font face="宋体">、楔角</font><font face="Times New Roman">/</font></strong><strong><font face="宋体">同心度</font><font face="Times New Roman">/</font></strong><strong><font face="宋体">倾斜</font></strong></font></font><br /> <font size="3"><font color="#000000"><font face="宋体">实际上，有楔角的元件</font><font face="Times New Roman"> </font><font face="宋体">与</font><font face="Times New Roman"> </font><font face="宋体">光轴相对于其机械轴倾斜</font><font face="Times New Roman"> </font><font face="宋体">的元件完全相同，当旋转元件时，元件具有边缘厚度差。</font></font></font><br /> <img src="data/attachment/forum/month_0708/20070807_8eb7e0d2168dfbfbfa5aQbOJISGqUaxr.jpg" onload="javascript:if(this.width>600)this.width=600;"><br /> <div align="center"><font size="3"><font color="#000000"></font></font></div><br /> <font size="3"><font color="#000000"><font face="宋体">如图，左侧为理想的透镜元件，而右侧为为上表面严重倾斜的透镜元件，可以看出：元件上表面倾斜即元件楔角导致透镜从左到右的厚度差。楔角就是边缘厚度差</font><font face="Times New Roman">2</font><font face="宋体">δ除以元件直径，单位为弧度，既用弧度表示楔角等于</font><font face="Times New Roman">2</font><font face="宋体">δ</font><font face="Times New Roman">/D</font><font face="宋体">。</font></font></font><br /> <font size="3"><font color="#000000"><font face="Times New Roman">ZEMAX</font><font face="宋体">里用</font><font face="Times New Roman">TIRX</font><font face="宋体">、</font><font face="Times New Roman">TIRY</font><font face="宋体">模拟跳动（</font><font face="Times New Roman">TIR</font><font face="宋体">）</font><font face="宋体"><font style="font-size:14.5pt">公差，如果</font></font><font face="华文仿宋"><font style="font-size:14.5pt"><font face="Times New Roman">TIR</font></font></font><font face="宋体"><font style="font-size:14.5pt">公差</font></font><font face="宋体">为</font><font face="Times New Roman">0.10mm</font><font face="宋体">，在</font><font face="Times New Roman">ZEMAX</font><font face="宋体">里则在镜头的最小</font><font face="Times New Roman">+x </font><font face="宋体">口径方向上的矢高为</font><font face="Times New Roman">0.05mm</font><font face="宋体">，在最小</font><font face="Times New Roman">-x </font><font face="宋体">口径方向上的偏离为</font><font face="Times New Roman">-.05mm</font><font face="宋体">，这表示一个值为</font><font face="Times New Roman">0.10mm<br /> </font><font face="宋体">的“总”的</font><font face="Times New Roman">TIR</font><font face="宋体">。</font></font></font><br /> <font size="3"><font color="#000000"><font face="黑体">TETX </font><font face="宋体">和</font><font face="黑体">TETY</font><font face="黑体">用来模拟元件的的倾斜，</font><font face="宋体">也可以被用来模拟单一表面的倾斜，有时被称为“光楔”，和</font><font face="黑体">TSTX </font><font face="宋体">和</font><font face="黑体">TSTY </font><font face="宋体">一样。</font><font face="黑体">TETX </font><font face="宋体">和</font><font face="黑体">TETY </font><font face="宋体">可以作用于任意一种类型的表面，包括标准表面和非标准表面，而</font><font face="黑体">TSTX </font><font face="宋体">和</font><font face="黑体">TSTY </font><font face="宋体">只作用于标准表面。为了使用</font><font face="黑体">TETX </font><font face="宋体">和</font><font face="黑体">TETY </font><font face="宋体">来倾斜一个单一表面，只要简单地将</font><font face="黑体">Int1 </font><font face="宋体">和</font><font face="黑体">Int2 </font><font face="宋体">设成相同的表面编号。</font></font></font><br /> <font face="华文仿宋"><font style="font-size:10pt"><font face="Times New Roman"><font size="3"><font color="#000000"></font></font></font></font></font><br /> <font size="3"><font color="#000000"><strong><font face="Times New Roman">6</font></strong><strong><font face="宋体">、</font><font face="Times New Roman">decenter</font></strong><strong><font face="宋体">（偏心）</font></strong></font></font><br /> <img src="data/attachment/forum/month_0708/20070807_845b4d0615a1aef755e95X1lOeFg6Ndo.jpg" onload="javascript:if(this.width>600)this.width=600;"><br /> <font size="3"><font color="#000000"><font face="宋体">单存向上偏心</font><font face="Times New Roman"><br /> </font><font face="宋体">绕左侧表面曲率中心旋转</font></font></font><br /> <div align="center"><strong><font face="Times New Roman"><font size="3"><font color="#000000"></font></font></font></strong></div><br /> <font size="3"><font color="#000000"><font face="宋体">偏心包括两种，一种是简单的横向偏心（上、下），另一种是使元件始终保持与机架座接触的“滚动”。请注意，尽管最终影响很相似，但两种偏心模型实际上完全不同。在滚动的情况下，与机架座接触良好的左侧半径被良好地校准，表面倾斜只发生的右侧表面上。</font><font face="Times New Roman">[1]</font></font></font><br /> <font size="3"><font color="#000000"><font face="宋体">在</font><font face="Times New Roman">ZEMAX</font><font face="宋体">里</font><font face="Times New Roman">TSDX</font><font face="宋体">、</font><font face="Times New Roman">TSDY</font><font face="宋体">用来模拟一个标准表面的偏心公差，单位为镜头长度（</font><font face="Times New Roman">mm</font><font face="宋体">）</font><font face="Times New Roman">,</font><font face="宋体">而</font><font face="Times New Roman">TEDX</font><font face="宋体">、</font><font face="Times New Roman">TEDY</font><font face="宋体">是用来模拟一个元件的偏心公差，可以是标准面也可以是非标准面，</font><font face="Times New Roman">int1</font><font face="宋体">、</font><font face="Times New Roman">int2</font><font face="宋体">定义了一个镜头组的边界面。</font></font></font><br /> <font face="Times New Roman"><font size="3"><font color="#000000"></font></font></font><br /> <font face="Times New Roman"><font size="3"><font color="#000000"></font></font></font><br /> <strong><font size="3"><font color="#000000"><font face="宋体">参考文献：</font></font></font></strong><br /> <font size="3"><font color="#000000"><font face="Times New Roman">[1]</font><font face="宋体">、《</font><font face="Times New Roman">Optical System Design</font><font face="宋体">》</font></font></font><br /> <font size="3"><font color="#000000"><font face="Times New Roman">[2]</font><font face="宋体">、《</font><font face="Times New Roman">ZemaxManual</font><font face="宋体">》</font></font></font><br /> <font face="宋体"><font size="3"><font color="#000000"></font></font></font> <br /> <font face="宋体"><font size="3"><font color="#000000"></font></font></font> <br /> <font face="宋体"><font size="3"><font color="#000000"></font></font></font> <br /> <font face="宋体"><font size="3"><font color="#000000"></font></font></font> <br /> <font face="宋体"><font size="3"><font color="#000000"></font></font></font> <br /> <br /> <br /> <br /> <br /> <br /> </div> <div class="postmsg"><br /> <br /> 好文章,顶一个!<br /> 整理的很好!鼓励一下!<br /> <br /> <br /> <br /> <br /> </div> <div class="postmsg"><br /> <br /> 恩,不错的文章啊<br /> 谢谢啊<br /> <br /> <br /> <br /> <br /> </div> <div class="postmsg"><br /> <br /> 希望大家能探讨一下，看哪里有问题。<br /> 一起总结出一个精益求精的公差实际应用的经验。<br /> <br /> <br /> <br /> <br /> </div> <div class="postmsg"><br /> <br /> 为什么不能下载呢?????<br /> <br /> <br /> <br /> <br /> </div> <div class="postmsg">不晓得楼主是做什么镜头的,我是做手机镜头的,目前偏心公差在0.004mm以内.有个别严的到了0.0015mm</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>liugz04</i> 于 2007-8-12 19:02 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=356388&ptid=56769" target="_blank"><img id="aimg_j7771" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> 不晓得楼主是做什么镜头的,我是做手机镜头的,目前偏心公差在0.004mm以内.有个别严的到了0.0015mm </blockquote></div><br /> <br /> 我提到的那些公差只针对一般的镜头。<br /> <br /> 0.0015的偏心差，太牛了。<br /> <br /> 手机镜头有几片镜子，用什么结构保证的？<br /> <br /> [<i> 本帖最后由 JasonHan 于 2007-8-13 08:58 编辑 </i>]</div> <div class="postmsg">像素不同，镜片结构就不一样，有镜片坎合的，也有镜室固定的</div> <div class="postmsg">不错啊，我来顶顶，努力的顶，哈哈</div> <div class="postmsg">一起总结出一个精益求精的公差实际应用的经验。<br /> 真的，理论跟实际真的有段不近距离，实践出真知</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>liugz04</i> 于 2007-8-12 19:02 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=356388&ptid=56769" target="_blank"><img id="aimg_KM9Ap" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> 不晓得楼主是做什么镜头的,我是做手机镜头的,目前偏心公差在0.004mm以内.有个别严的到了0.0015mm </blockquote></div><br /> <br /> 我能理解，片子小了，工差要求就高。只是不知象手机镜头这样的系统，用什么工艺来保证那么高的工差要求？</div> <div class="postmsg">好贴，支持，受益非浅！<img src="static/image/smiley/default/em17.gif" smilieid="46" border="0" alt="" /> <img src="static/image/smiley/default/em17.gif" smilieid="46" border="0" alt="" /></div> <div class="postmsg">楼主的资料都是玻璃球面的吧<br /> 有没有非球面公差的资料?<br /> 拜求</div> <div class="postmsg">挺好的资料阿<br /> <br /> 挺好的<br /> 谢谢昂,~~~~</div> <div class="postmsg">附件里面是什么呢？帖子里面好像已经写了啊</div> <div class="postmsg">原来就是为了这篇帖子得了个资源贡献牌牌啊<br /> <img src="static/image/smiley/default/em34.gif" smilieid="63" border="0" alt="" /> <br /> 恭喜啊</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>yangle908</i> 于 2007-10-8 16:14 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=380100&ptid=56769" target="_blank"><img id="aimg_EEjQq" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> 原来就是为了这篇帖子得了个资源贡献牌牌啊<br /> <img src="static/image/smiley/default/em34.gif" smilieid="63" border="0" alt="" /> <br /> 恭喜啊 </blockquote></div><br /> <br /> 不是因为这个<br /> <br /> 这个只是九牛一毛。</div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>JasonHan</i> 于 2007-10-8 16:34 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=380122&ptid=56769" target="_blank"><img id="aimg_eZlgm" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> <br /> <br /> 不是因为这个<br /> <br /> 这个只是九牛一毛。 </blockquote></div><br /> <img src="static/image/smiley/default/em19.gif" smilieid="48" border="0" alt="" /> <img src="static/image/smiley/default/em19.gif" smilieid="48" border="0" alt="" /> <img src="static/image/smiley/default/em19.gif" smilieid="48" border="0" alt="" /> <img src="static/image/smiley/default/em19.gif" smilieid="48" border="0" alt="" /></div> <div class="postmsg">看需求的不同吧<br /> <br /> 手机那个确实比较令人汗</div> <div class="postmsg">多谢楼主分享！<br /> 楼主的文章真是太精彩了，受益菲浅！<br /> <br /> 目前手机镜头镜片都是模具成型，加上镜片口径小，Decenter一般都要求2、3μ以内。但两个面的面倾斜目前还无法准确测量。由于镜筒本身的精度及结构限制，镜片装配后偏心一般都比较大。</div> <div class="postmsg">一般都做在镜片上~去要求精度~!!<br /> 多谢楼主分享！<br /> 楼主的文章真是太精彩了，受益菲浅！</div> <div class="postmsg">好文章,顶一个!好文章,顶一个!好文章,顶一个!</div> <div class="postmsg">强烈感谢<br /> 强烈感谢<br /> 强烈感谢<br /> 强烈感谢</div> <div class="postmsg"><img src="static/image/smiley/default/em31.gif" smilieid="60" border="0" alt="" /> <img src="static/image/smiley/default/em31.gif" smilieid="60" border="0" alt="" /> 还可以，先行谢谢楼主了</div> <div class="postmsg">楼主的可能是大型的光学系统..手机的是比较小..偏心允许0.005就已经是很好的公差,我们实际设计的时候一定要考虑这个问题,,否则即使镜头的MTF漂亮,那也是没用的!目前我们公司的手机镜头0.005的偏心公差是必须的..否则良品率很难保证...另外手机镜头的空气间隔公差也需要注意..应该要大于0.015MM..否则也很难保证良品率!!另外哪位同仁有CODE V的中文说明书,我想学习CODE V的宏语言设计...如果有兴趣大家可以交流下设计理念,我的QQ38128320 邮箱<a href="mailto:qianghuaw@phenixgd.cn">qianghuaw@phenixgd.cn</a>!!我师傅说:一个好的产品90%在设计,5%在模具!这应该是我们设计人员的座右铭!!</div> <div class="postmsg"><img src="static/image/smiley/default/handshake.gif" smilieid="17" border="0" alt="" /> 学习光学设计中<img src="static/image/smiley/default/loveliness.gif" smilieid="28" border="0" alt="" /> <img src="static/image/smiley/default/loveliness.gif" smilieid="28" border="0" alt="" /></div> <div class="postmsg"><div class="quote"><blockquote>原帖由 <i>123inter789</i> 于 2008-7-13 09:14 发表 <a href="http://bbs.oecr.com/redirect.php?goto=findpost&pid=466038&ptid=56769" target="_blank"><img id="aimg_adsBK" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /></a><br /> 楼主的可能是大型的光学系统..手机的是比较小..偏心允许0.005就已经是很好的公差,我们实际设计的时候一定要考虑这个问题,,否则即使镜头的MTF漂亮,那也是没用的!目前我们公司的手机镜头0.005的偏心公差是必须的..否则 ... </blockquote></div><br /> 恩，我所讲的公差是针对常规的镜头，对于手机的小型镜头是不够的。</div> <div class="postmsg">我们的手机镜头偏心也是按0.005mm来考虑的，但有时候也很难做到<br /> 而镜片厚度及空气间隙公差我们都是按0.01mm来做，这个主要用镜片成型的精度来控制。</div> <div class="postmsg">好文章,<br /> 真是太感謝了,<br /> 多謝樓主分享!!!<br /> <img src="static/image/smiley/default/em49.gif" smilieid="78" border="0" alt="" /></div> <div class="postmsg">非常好，正找这方面的教材，多谢楼主</div> <div class="postmsg">好帖 正在学习这方面的知识 感谢lz了</div> <div class="postmsg">感觉有点太松了把，再严格点现在也能做到</div> <div class="postmsg">楼主，你的公差范围太大了，现在加工精度都提高了，</div> <div class="postmsg">怎么下载不了？<br /> 提示不许从外部链接下，可是我就是从站内下载的啊</div> <img src="data/attachment/forum/month_0708/20070807_845b4d0615a1aef755e95X1lOeFg6Ndo.jpg" alt="光学设计中的公差概念: 2.jpg" title="光学设计中的公差概念: 2.jpg" onload="javascript:if(this.width>600)this.width=600;"> <div style="height200px;"></div> <ul class="xl xl2 cl" style="border-top: 1px #cccccc dashed;margin:5px 0 ;padding-top:5px"> <dl><b> 同一主题资料:</b></dl> <dl style="margin:10px 1px;display:inline"><a href="attachcenter-page.html?aid=12385" title="1.jpg"><img 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