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onclick="setCopy('http://forum.oecr.com/plugin.php?id=attachcenter:page&aid=2292', '链接已经复制到剪贴板');" type="submit"> <em>复制链接推荐给好友</em></button> <input type="text" class="px vm" onclick="this.select();setCopy(this.value, '链接已经复制到剪贴板');" value="http://forum.oecr.com/plugin.php?id=attachcenter:page&aid=2292" size="50" /></p> </div> <div class="bm"> <div class="bm_c xld"> <b>测焦距:</b><div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>各位仁兄，有没有比较好的办法测量小透镜的焦距？</P><br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>(直径4mm)</P></div> <div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>用光具座倒是好的办法，但是感觉比较麻烦，不知精度都会有多高？</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>另外如果不是球面镜，而是biconic表面。</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>这个方法还适用吗？</P></div> <div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />><b><FONT color=#000066>感觉huyan123老兄说的方法不太实用，太复杂。</FONT></b></P></div> <div class="postmsg">我有做这麽小的，但没测过焦距，我打听一下。</div> <div class="postmsg">如果是镜片就用光具座,镜头就用对焦机.</div> <div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>用平行光作光源，通过透镜后用CCD接受，找到聚焦点的位置。</P></div> <div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>用对焦仪，不过需要做一个夹具</P></div> <div class="postmsg"><DIV class=quote><B>以下是引用<I>愚人</I>在2004-6-23 10:51:38的发言：</B><br /> <br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />><B><FONT color=#000066>感觉huyan123老兄说的方法不太实用，太复杂。</FONT></B></P></DIV><br /> <br /> 精度很高呀!如果不要求太高,省去CCD,电脑不就可以了?调节架,平行光源没法省了!</div> <div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>呵呵，那倒是。做一个好的调节架很重要。这里有同事找的一个文件。贴上来给大家参考。</P><br /> </div> <div class="postmsg"><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>如果透镜的焦点有偏移的话，自准直仪可以测量出偏移量吗？</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>我也在想用两维CCD，然后可以把每个像素的光强也记录下来，就可以得到一个三维的数据图，这样就可以得到焦点的偏移量了</P><<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>不过具体操作起来比较麻烦，一是光源和接受器要匹配，二是CCD的选择，不知道哪里有CCD的配件和相应的光源。还请各位帮忙。</P></div> <div class="postmsg"><DIV class=quote><B>以下是引用<I>huyan123</I>在2004-6-22 17:34:48的发言：</B><br /> <br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>用平行光作光源，通过透镜后用CCD接受，找到聚焦点的位置。</P></DIV><br /> <br /> CCD的具体名称是什么?谢谢<img src="static/image/smiley/default/em10.gif" smilieid="39" border="0" alt="" /></div> <div class="postmsg">我们公司的设备是可以检测焦距的，但是主要是用来检测MTF的！</div> <div class="postmsg"><DIV class=quote><B>以下是引用<I>atpnight</I>在2004-7-2 9:17:09的发言：</B><br /> 我们公司的设备是可以检测焦距的，但是主要是用来检测MTF的！</DIV><br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />><br /> <<img src="static/image/smiley/default/titter.gif" smilieid="9" border="0" alt="" />>能介绍一下你们的设备吗？我也想要</P></div> <div style="height200px;"></div> </div> </div> </div> </div></div> </div> <!--autocomment filter by maxnum--> <div class="ft_wp"> <div id="ft" class=" cl"> <div id="flk" > <p> <a href="http://wpa.qq.com/msgrd?V=3&Uin=20600600&Site=光电工程师社区&Menu=yes&from=discuz" target="_blank" title="QQ"><img src="static/image/common/site_qq.jpg" alt="QQ" /></a><span class="pipe">|</span><a href="http://m.oecr.com" >手机版</a><span class="pipe">|</span><a href="http://so.oecr.com" title="站内搜索" target="_blank" >搜索</a><span class="pipe">|</span><a href="http://www.focaloptics.com" title="主办单位：武汉焦点光学技术有限公司" target="_blank" >焦点光学</a><span class="pipe">|</span><a href="http://www.oecr.com" target="_blank">光电工程师社区</a> ( <a href="http://beian.miit.gov.cn/" 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