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src="static/image/common/oshr.png" alt="分享" />分享<span id="sharenumber">0</span></i></a> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=favorite&type=thread&id=168811" id="k_favorite" onclick="showWindow(this.id, this.href, 'get', 0);" onmouseover="this.title = $('favoritenumber').innerHTML + ' 人收藏'"><i><img src="static/image/common/fav.gif" alt="收藏" />收藏<span id="favoritenumber">0</span></i></a> <a id="recommend_add" href="forum.php?mod=misc&action=recommend&do=add&tid=168811&hash=3bf4e863" onclick="showWindow('login', this.href)" onmouseover="this.title = $('recommendv_add').innerHTML + ' 人支持'"><i><img src="static/image/common/rec_add.gif" alt="支持" />支持<span id="recommendv_add">0</span></i></a> <a id="recommend_subtract" href="forum.php?mod=misc&action=recommend&do=subtract&tid=168811&hash=3bf4e863" onclick="showWindow('login', this.href)" onmouseover="this.title = $('recommendv_subtract').innerHTML + ' 人反对'"><i><img src="static/image/common/rec_subtract.gif" alt="反对" />反对<span id="recommendv_subtract">0</span></i></a> </div> </td> <td valign="top" class="album_side_r"> <div class="album_side"> <div class="hm mtn mbn"> <a href="http://club.oecr.com/space-uid-127771.html" target="_blank" class="xi2"><img src="http://www.oecr.com/uc_server/avatar.php?uid=127771&size=small" /></a> <span class="tit_author"> <a href="http://club.oecr.com/space-uid-127771.html">skolari</a> </span> </div> <div class="date"><span>发布时间:</span> 2011-5-25 23:15</div> <div class="album_info"> <h3>正文摘要: </h3> <p>小弟以前从未接触光学，但这学期的课题要做一个SPR传感器，目前遇到一些问题想请教各位（可能问得比较白痴，请见谅） 光路是这样的：HE-NE激光器，两个偏振片，空间滤波器，准直透镜 CCD拍到的图像是这样的。。。 ...</p> </div> </div> </td> </tr> </table> </div> </div> <div class="bm vw pl" id="comment"> <div class="bm_h cl"> <h2>回复</h2> </div> <div class="bm_c"> <div id="postlistreply" class="xld xlda mbm"><div id="post_new" class="viewthread_table" style="display: none"></div></div><div id="post_821672" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-123294.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=123294&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-123294.html" target="_blank" class="xi2">minory</a><em id="author_821672"> 发表于</em> <span class="xg1 xw0">2011-6-8 21:10:59</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_821672"> 偏振片空间滤波器准直光路什么的先别加，直接扩束看光束，大的条纹可能是光源的问题</td></tr></table> </div> <div id="comment_821672" class="cm"> </div> <div id="post_rate_div_821672"></div> </div> </dd> </dl> </div> <div id="post_820484" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-6421.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=6421&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-6421.html" target="_blank" class="xi2">qhw</a><em id="author_820484"> 发表于</em> <span class="xg1 xw0">2011-6-3 13:59:29</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_820484"> 图像里初步看有３种条纹，小园的，应该是衍射班，是光学元件有灰尘或霉点所致。<br /> 斜大条纹中还有小条纹，比较讨厌，原因会比较复杂。通过给光路中气流扰动是否为动。如不动，为光学元件前后面干涉形成，如动，为两光学元件之间的面干涉形成。<br /> 斜大的条纹，一种可能是偏振片两面之间的干涉形成的，知道偏振片的厚度的话可以计算条纹间距，来和CCD所得条纹比较是否符合。<br /> 小条纹也可以通过上述方法来判断，初步判断可能在４０×的物镜上。由于不知道你的光路具体参数，谨提供上面的判断方法了。</td></tr></table> </div> <div id="comment_820484" class="cm"> </div> <div id="post_rate_div_820484"></div> </div> </dd> </dl> </div> <div id="post_815970" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-123445.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=123445&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-123445.html" target="_blank" class="xi2">zhangjingru8311</a><em id="author_815970"> 发表于</em> <span class="xg1 xw0">2011-5-27 14:29:27</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_815970"> <img src="static/image/smiley/Tiger/07.gif" smilieid="145" border="0" alt="" />学习学习</td></tr></table> </div> <div id="comment_815970" class="cm"> </div> <div id="post_rate_div_815970"></div> </div> </dd> </dl> </div> <div id="post_815813" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-113305.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=113305&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-113305.html" target="_blank" class="xi2">镜片检测</a><em id="author_815813"> 发表于</em> <span class="xg1 xw0">2011-5-27 09:25:40</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_815813"> <strong>回复 <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=815652&ptid=168811" target="_blank"><font color="Olive">skolari</font> 的帖子</a></strong><br /> <br /> 我估计是两块偏振片不平行造成的，你可以试试调节两块参照片的平行度，看是否有效果。一定要缓慢仔细调，他们之间很可能存在角度。</td></tr></table> </div> <div id="comment_815813" class="cm"> </div> <div id="post_rate_div_815813"></div> </div> </dd> </dl> </div> <div id="post_815759" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-126906.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=126906&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-126906.html" target="_blank" class="xi2">oe507</a><em id="author_815759"> 发表于</em> <span class="xg1 xw0">2011-5-27 08:42:54</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_815759"> 呵呵，感觉是你的共轴调的太好了，用两个偏振片似乎是用来调光强的，你可以将偏振片偏转一个小角度，不要大于偏振片要求的最小入射角；如果两个偏振片真的是用来调光强的，可以换中性密度片试试。后面的光路是典型的扩束准直系统，应该不会出现这种问题；如果是在平台或光距座上调试，12楼的系统外杂光也可能有影响，可以加入消杂光阑试试。<br /> 另：干涉三条件：同频，相位差恒定，振动方向相同。<br /> 呵呵，希望对你有所帮助。</td></tr></table> </div> <div id="comment_815759" class="cm"> </div> <div id="post_rate_div_815759"></div> </div> </dd> </dl> </div> <div id="post_815713" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-119303.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=119303&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-119303.html" target="_blank" class="xi2">liurunjun</a><em id="author_815713"> 发表于</em> <span class="xg1 xw0">2011-5-27 03:21:15</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_815713"> 从影像来看，首先你的摄像头与物镜中心不同轴，成像光束若不同心，边缘光线就参与成像，如果入射到镜头的光线与光轴存在角度那么光程差就会出现，比如上下表面的两束光。<br /> 消除这种条纹首先要在共轭面上找，而且一定是凸面类透镜，否则不会出现弧度清晰的曲面，另一方面能成像清晰位置一定在物方焦平面上，先确定位置就好解决了</td></tr></table> </div> <div id="comment_815713" class="cm"> </div> <div id="post_rate_div_815713"></div> </div> </dd> </dl> </div> <div id="post_815653" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-127771.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=127771&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-127771.html" target="_blank" class="xi2">skolari</a><em id="author_815653"> 发表于</em> <span class="xg1 xw0">2011-5-26 21:00:15</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_815653"> <div class="quote"><blockquote><font size="2"><font color="#999999">oe507 发表于 2011-5-26 17:40</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=815602&ptid=168811" target="_blank"><img id="aimg_jS9Wr" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" file="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" lazyloadthumb="1" border="0" alt="" /></a></font><br /> 如果是按你说的器件依次排列的光路话，可能是偏振片间反射和透射光束间的干涉，可以按7楼的方法试试，破坏干 ...</blockquote></div><br /> 额~~这位大哥能具体讲讲吗，破坏哪三个条件？小弟光学基础很薄弱的。。。。</td></tr></table> </div> <div id="comment_815653" class="cm"> </div> <div id="post_rate_div_815653"></div> </div> </dd> </dl> <script type="text/javascript" reload="1"> aimgcount[815653] = ['jS9Wr']; attachimggroup(815653); </script> </div> <div id="post_815652" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-127771.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=127771&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-127771.html" target="_blank" class="xi2">skolari</a><em id="author_815652"> 发表于</em> <span class="xg1 xw0">2011-5-26 20:58:37</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_815652"> <div class="quote"><blockquote><font size="2"><font color="#999999">镜片检测 发表于 2011-5-26 16:11</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=815557&ptid=168811" target="_blank"><img id="aimg_r00xK" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" file="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" lazyloadthumb="1" border="0" alt="" /></a></font><br /> HE-NE激光的相干长度一般都很长，很容易发生干涉，不清楚你的光路具体是怎么样的。但基本原理是，两束光有光 ...</blockquote></div><br /> 光路是这样的：就是激光通过两个偏振片，再通过一个40倍的显微物镜扩束，在焦点处放置一个真空滤去杂光，最后扩束后的光线通过平凸透镜准直。 <br /> 我想问如果整个系统做到绝对的共轴，是不是就不会产生干涉了呢？</td></tr></table> </div> <div id="comment_815652" class="cm"> </div> <div id="post_rate_div_815652"></div> </div> </dd> </dl> <script type="text/javascript" reload="1"> aimgcount[815652] = ['r00xK']; attachimggroup(815652); </script> </div> <div id="post_815602" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-126906.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=126906&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-126906.html" target="_blank" class="xi2">oe507</a><em id="author_815602"> 发表于</em> <span class="xg1 xw0">2011-5-26 17:40:03</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_815602"> <i class="pstatus"> 本帖最后由 oe507 于 2011-5-26 17:40 编辑 </i><br /> <br /> 如果是按你说的器件依次排列的光路话，可能是偏振片间反射和透射光束间的干涉，可以按7楼的方法试试，破坏干涉三必要条件，应该可以消除。</td></tr></table> </div> <div id="comment_815602" class="cm"> </div> <div id="post_rate_div_815602"></div> </div> </dd> </dl> </div> <div id="post_815581" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-18999.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=18999&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-18999.html" target="_blank" class="xi2">kkkyt</a><em id="author_815581"> 发表于</em> <span class="xg1 xw0">2011-5-26 16:53:45</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_815581"> 也可以扩束一下试试。看看有没有改善。</td></tr></table> </div> <div id="comment_815581" class="cm"> </div> <div id="post_rate_div_815581"></div> </div> </dd> </dl> </div> <div id="post_815557" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-113305.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=113305&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-113305.html" target="_blank" class="xi2">镜片检测</a><em id="author_815557"> 发表于</em> <span class="xg1 xw0">2011-5-26 16:11:35</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_815557"> HE-NE激光的相干长度一般都很长，很容易发生干涉，不清楚你的光路具体是怎么样的。但基本原理是，两束光有光程差，从这个方面去排除。如果还是不能排除，就直接换相干长度小的光源，就不会发生干涉。</td></tr></table> </div> <div id="comment_815557" class="cm"> </div> <div id="post_rate_div_815557"></div> </div> </dd> </dl> </div> </div> </div> </div> <script type="text/javascript"> new lazyload(); </script> <div class="wp mtn"> <!--[diy=diy3]--><div id="diy3" class="area"></div><!--[/diy]--> </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" 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