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href="http://club.oecr.com/space-uid-104929.html" target="_blank" class="xi2"><img src="http://www.oecr.com/uc_server/avatar.php?uid=104929&size=small" /></a> <span class="tit_author"> <a href="http://club.oecr.com/space-uid-104929.html">houshannanhai</a> </span> </div> <div class="date"><span>发布时间:</span> 2013-11-5 22:48</div> <div class="album_info"> <h3>正文摘要: </h3> <p> 本帖最后由 houshannanhai 于 2013-11-6 13:20 编辑 我用一组透镜用作为光纤的准直透镜，大致调整后，我观察了一下从光纤出射的激光经过透镜组后，即使传播一段比较远的距离，光斑变化不是很大。 为了进一步检验 ...</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_1187512" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-163249.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=163249&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-163249.html" target="_blank" class="xi2">usertouch</a><em id="author_1187512"> 发表于</em> <span class="xg1 xw0">2016-6-30 13:56:27</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1187512"> 发生小孔衍射了吧，你的激光比小孔大，如果要判断准直，9mm的光斑可以在5、6米远看准直了</td></tr></table> </div> <div id="comment_1187512" class="cm"> </div> <div id="post_rate_div_1187512"></div> </div> </dd> </dl> </div> <div id="post_1134557" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-159135.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=159135&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-159135.html" target="_blank" class="xi2">Autocollimator</a><em id="author_1134557"> 发表于</em> <span class="xg1 xw0">2014-10-23 15:11:44</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1134557"> 这个现象很单纯,基本上就是衍射造成的,跟透镜没太大关系,从你贴的图片来看光点质量还算良好,并没有迹象显示镜片有明显像差,所以,基本上这就是个衍射的议题。</td></tr></table> </div> <div id="comment_1134557" class="cm"> </div> <div id="post_rate_div_1134557"></div> </div> </dd> </dl> </div> <div id="post_1134286" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-90507.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=90507&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-90507.html" target="_blank" class="xi2">optro</a><em id="author_1134286"> 发表于</em> <span class="xg1 xw0">2014-10-18 16:56:37</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1134286"> <div class="quote"><blockquote><font size="2"><font color="#999999">houshannanhai 发表于 2014-9-22 00:21</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=1132779&ptid=261195" target="_blank"><img id="aimg_LZL1n" 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 /> 您的第一点，有两个词我不大明白束角和束散。您在第一点说的意思是否是小孔不会改变光束的发散角？加上小 ...</blockquote></div><br /> 对</td></tr></table> </div> <div id="comment_1134286" class="cm"> </div> <div id="post_rate_div_1134286"></div> </div> </dd> </dl> <script type="text/javascript" reload="1"> aimgcount[1134286] = ['LZL1n']; attachimggroup(1134286); </script> </div> <div id="post_1132779" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-104929.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=104929&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-104929.html" target="_blank" class="xi2">houshannanhai</a><em id="author_1132779"> 发表于</em> <span class="xg1 xw0">2014-9-22 00:21:56</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1132779"> <div class="quote"><blockquote><font size="2"><font color="#999999">optro 发表于 2014-6-7 07:20</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=1121923&ptid=261195" target="_blank"><img id="aimg_oM4Cu" 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 /> 第一、小孔仅仅只能减少光功率，不能改变束角，在加小孔的时候，测得的光斑，几乎是束散造成。<br /> 第二、当去 ...</blockquote></div><br /> 您的第一点，有两个词我不大明白束角和束散。您在第一点说的意思是否是小孔不会改变光束的发散角？加上小孔后，小孔后的光斑就是光束发散造成的？是这样子吗？<br /> 第二点，你的意思是否是，如果去掉光阑后，光阑后远处的光斑与有光阑时相比变化不大，那么说明准直效果不好？<br /> 谢谢您的帮助</td></tr></table> </div> <div id="comment_1132779" class="cm"> </div> <div id="post_rate_div_1132779"></div> </div> </dd> </dl> <script type="text/javascript" reload="1"> aimgcount[1132779] = ['oM4Cu']; attachimggroup(1132779); </script> </div> <div id="post_1132778" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-104929.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=104929&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-104929.html" target="_blank" class="xi2">houshannanhai</a><em id="author_1132778"> 发表于</em> <span class="xg1 xw0">2014-9-22 00:10:10</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1132778"> <div class="quote"><blockquote><font size="2"><font color="#999999">watermoon 发表于 2014-6-5 15:24</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=1121772&ptid=261195" target="_blank"><img id="aimg_zv75B" 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 /> 你没仔细看。<br /> <br /> 只好明说了：</blockquote></div><br /> 您第四点说的，很可能就是问题的所在。</td></tr></table> </div> <div id="comment_1132778" class="cm"> </div> <div id="post_rate_div_1132778"></div> </div> </dd> </dl> <script type="text/javascript" reload="1"> aimgcount[1132778] = ['zv75B']; attachimggroup(1132778); </script> </div> <div id="post_1126120" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-15590.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=15590&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-15590.html" target="_blank" class="xi2">kitten</a><em id="author_1126120"> 发表于</em> <span class="xg1 xw0">2014-7-17 12:32:06</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1126120"> 此帖有价值！</td></tr></table> </div> <div id="comment_1126120" class="cm"> </div> <div id="post_rate_div_1126120"></div> </div> </dd> </dl> </div> <div id="post_1125083" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-139599.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=139599&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-139599.html" target="_blank" class="xi2">魅力薄膜</a><em id="author_1125083"> 发表于</em> <span class="xg1 xw0">2014-7-5 21:55:53</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1125083"> <div class="quote"><blockquote><font size="2"><font color="#999999">watermoon 发表于 2014-6-5 15:24</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=1121772&ptid=261195" target="_blank"><img id="aimg_fLb7l" 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 /> 你没仔细看。<br /> <br /> 只好明说了：</blockquote></div><br /> 你这个是高斯切趾模拟出来的吗</td></tr></table> </div> <div id="comment_1125083" class="cm"> </div> <div id="post_rate_div_1125083"></div> </div> </dd> </dl> <script type="text/javascript" reload="1"> aimgcount[1125083] = ['fLb7l']; attachimggroup(1125083); </script> </div> <div id="post_1121923" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-90507.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=90507&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-90507.html" target="_blank" class="xi2">optro</a><em id="author_1121923"> 发表于</em> <span class="xg1 xw0">2014-6-7 07:20:05</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1121923"> 第一、小孔仅仅只能减少光功率，不能改变束角，在加小孔的时候，测得的光斑，几乎是束散造成。<br /> 第二、当去掉光阑的时候，几乎是相当大小光斑，说明你的准直很差。<br /> 第三、你的焦距是20左右？输出光斑直径9毫米左右？相差在这里已经不重要了。<br /> 第四、光纤直径有问题，数据似乎不准确。</td></tr></table> </div> <div id="comment_1121923" class="cm"> </div> <div id="post_rate_div_1121923"></div> </div> </dd> </dl> </div> <div id="post_1121772" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-35699.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=35699&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-35699.html" target="_blank" class="xi2">watermoon</a><em id="author_1121772"> 发表于</em> <span class="xg1 xw0">2014-6-5 15:24:48</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1121772"> <div class="quote"><blockquote><font size="2"><font color="#999999">houshannanhai 发表于 2014-6-5 11:40</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=1121740&ptid=261195" target="_blank"><img id="aimg_C8a83" 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 /> 你好 你的 图片好像没有 解决 我的疑问？<br /> 能否说明一下你这个图片是什么意思？<br /> 你的图片 应该是 对于 一 ...</blockquote></div><br /> 你没仔细看。<br /> <br /> 只好明说了：<br /> 1、你所说的问题，是透镜的像差问题。出现这种现象，说明你的透镜（组）没有很好地校正像差；<br /> 2、即便是校正像差，通常也只是部分校正，没有完美校正（除非是很好的非球面）；<br /> 3、你所说的这个现象，跟是否是点光源没有任何关系；<br /> 4、你在不加光阑时候，看上去准直了，是对整体而言，主要是外部（孔径角大）的光束被准直了，但是内部（孔径角小）的光束并不是准直的。但是由于内部发散角较小，在一定范围没有超过外部光束，看上去也就不影响准直效果。<br /> <br /> 不知道这样说清楚了吗？再看下面相同透镜，不同发散角准直的效果：<br /> <ignore_js_op> <img id="aimg_86069" aid="86069" src="static/image/common/none.gif" zoomfile="data/attachment/forum/201406/05/152344v2vbsnhnt7hn044x.jpg" file="data/attachment/forum/201406/05/152344v2vbsnhnt7hn044x.jpg" class="zoom" onclick="zoom(this, this.src, 0, 0, 0)" width="98" id="aimg_86069" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_86069_menu" style="position: absolute; display: none" disautofocus="true"> <div class="xs0"> <p><strong>02.JPG</strong> <em class="xg1">(39.86 KB, 下载次数: 54)</em></p> <p> <a href="http://bbs.oecr.com/forum.php?mod=attachment&aid=ODYwNjl8MzFjYWZjYmN8MTc2NjAxNjU5M3wwfDI2MTE5NQ%3D%3D&nothumb=yes" target="_blank">下载附件</a> <a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_86069" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=86069&handlekey=savephoto_86069">保存到相册</a> </p> <p class="xg1 y">2014-6-5 15:23 上传</p> </div> <div class="tip_horn"></div> </div> </ignore_js_op> <br /> <ignore_js_op> <img id="aimg_86068" aid="86068" src="static/image/common/none.gif" zoomfile="data/attachment/forum/201406/05/152344e2m75ded2m8btlqt.jpg" file="data/attachment/forum/201406/05/152344e2m75ded2m8btlqt.jpg" class="zoom" onclick="zoom(this, this.src, 0, 0, 0)" width="98" id="aimg_86068" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_86068_menu" style="position: absolute; display: none" disautofocus="true"> <div class="xs0"> <p><strong>01.JPG</strong> <em class="xg1">(52.64 KB, 下载次数: 57)</em></p> <p> <a href="http://bbs.oecr.com/forum.php?mod=attachment&aid=ODYwNjh8MjJjMmIzNmV8MTc2NjAxNjU5M3wwfDI2MTE5NQ%3D%3D&nothumb=yes" target="_blank">下载附件</a> <a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_86068" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=86068&handlekey=savephoto_86068">保存到相册</a> </p> <p class="xg1 y">2014-6-5 15:23 上传</p> </div> <div class="tip_horn"></div> </div> </ignore_js_op> </td></tr></table> </div> <div id="comment_1121772" class="cm"> </div> <div id="post_rate_div_1121772"></div> </div> </dd> </dl> <script type="text/javascript" reload="1"> aimgcount[1121772] = ['C8a83','86069','86068']; attachimggroup(1121772); </script> </div> <div id="post_1121740" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-104929.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=104929&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-104929.html" target="_blank" class="xi2">houshannanhai</a><em id="author_1121740"> 发表于</em> <span class="xg1 xw0">2014-6-5 11:40:17</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1121740"> <div class="quote"><blockquote><font size="2"><font color="#999999">watermoon 发表于 2013-11-12 15:07</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=1104265&ptid=261195" target="_blank"><img id="aimg_pEcFQ" 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 /> 不知道附件中的图，你看完后是否能解开你的迷惑！？</blockquote></div><br /> 你好 你的 图片好像没有 解决 我的疑问？<br /> 能否说明一下你这个图片是什么意思？<br /> 你的图片 应该是 对于 一个点光源进行准直 （因为我没看见有别的视场的光，除了0视场）<br /> 准直也没有完全平行（当然完全平行是理想状态）。<br /> 如果实际的光纤都是点光源 那么我想 应该不会出现 我遇到问题：<br /> 就是 看起来准直效果很好 近场远场光斑变化不大<br /> 但是一放上光阑 近场光斑等于光阑大小 但是远场光斑还是会变大。<br /> 我现在的理解是 不同视场的（对应光纤芯径的不同位置）光造成的。<br /> 因为如果只有零视场的光即为点光源 那么 放上光阑后 近场光斑等于光阑大小 但是远场光斑不会变化很大（正如你光路所示）。<br /> 但是实际光纤有一定尺寸，端面不同位置是以一定角度进入光阑，这样远场光斑变化就会相对只考虑零视场的光更大。<br /> <br /> 这个可以在zemax多设置几个视场（物高）看出。<br /> </td></tr></table> </div> <div id="comment_1121740" class="cm"> </div> <div id="post_rate_div_1121740"></div> </div> </dd> </dl> <script type="text/javascript" reload="1"> aimgcount[1121740] = ['pEcFQ']; attachimggroup(1121740); </script> </div> <div id="post_1121738" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-104929.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=104929&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-104929.html" target="_blank" class="xi2">houshannanhai</a><em id="author_1121738"> 发表于</em> <span class="xg1 xw0">2014-6-5 11:25:02</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1121738"> <div class="quote"><blockquote><font size="2"><font color="#999999">optro 发表于 2014-6-2 15:27</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=1121467&ptid=261195" target="_blank"><img id="aimg_MW3rj" 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 /> 你的激光<br /> 波长？<br /> 光纤直径？</blockquote></div><br /> 波长 532nm<br /> 光纤芯径1mm<br /> NA=0.22 多模光纤 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