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src="static/image/common/hot_3.gif" alt="" title="热度: 98" /> <a href="http://bbs.oecr.com/thread-248350-1-1.html" onclick="return copyThreadUrl(this, '光电工程师社区')" >[复制链接]</a> </span> </td> </tr> </table> <table cellspacing="0" cellpadding="0" class="ad"> <tr> <td class="pls"> </td> <td class="plc"> </td> </tr> </table><div class="postaaa posta0" id="post_960917" ><table id="pid960917" class="plhin" summary="pid960917" cellspacing="0" cellpadding="0"> <tr> <td class="pls" rowspan="2"> <div id="favatar960917" class="pls favatar"> <div class="pi"> <div class="authi"><a href="http://club.oecr.com/space-uid-133680.html" target="_blank" class="xw1" style="color: #33FF00">heridong</a> </div> </div> <div class="p_pop blk bui card_gender_" id="userinfo960917" style="display: none; margin-top: -11px;"> <div class="m z"> <div id="userinfo960917_ma"></div> </div> <div class="i y"> <div> <strong><a href="http://club.oecr.com/space-uid-133680.html" target="_blank" class="xi2" style="color: #33FF00">heridong</a></strong> <em>当前离线</em> </div><dl class="cl"> <dt>积分</dt><dd><a href="http://club.oecr.com/home.php?mod=space&uid=133680&do=profile" target="_blank" class="xi2">135</a></dd> </dl><div class="imicn"> <a href="http://club.oecr.com/home.php?mod=space&uid=133680&do=profile" target="_blank" title="查看详细资料"><img src="static/image/common/userinfo.gif" alt="查看详细资料" /></a> <a href="http://club.oecr.com/home.php?mod=magic&mid=showip&idtype=user&id=heridong" id="a_showip_li_960917" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/showip.small.gif" alt="" /> IP卡</a> <a href="http://club.oecr.com/home.php?mod=magic&mid=checkonline&idtype=user&id=heridong" id="a_repent_960917" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/checkonline.small.gif" alt="" /> 狗仔卡</a> </div> <div id="avatarfeed"><span id="threadsortswait"></span></div> </div> </div> <div> <div class="avatar"><a 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id="authorposton960917">发表于 2011-12-21 14:08:01</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=248350&page=1&authorid=133680" rel="nofollow">只看该作者</a> <span class="none"><img src="static/image/common/arw_r.gif" class="vm" alt="回帖奖励" /></span> <span class="pipe show">|</span><a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=248350&extra=page%3D1&ordertype=1" class="show">倒序浏览</a> <span class="pipe show">|</span><a href="javascript:;" onclick="readmode($('thread_subject').innerHTML, 960917);" class="show">阅读模式</a> </div> </div> </div><div class="pct"><style type="text/css">.pcb{margin-right:0}</style><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_960917"> 有个问题：光纤<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>器产生的激光从光纤的一端输出后，为什么要接校准管(collimator)和望远镜(expander)后再经过聚焦系统生成几十微米甚至是几微米的光斑？ 难道激光从光纤一端输出后直接经聚焦系统生成几十微米甚至是几微米的光斑吗？<br /> 另请指点所谓的校准管(collimator)和望远镜(expander)的工作原理。<br /> 谢啦！</td></tr></table> <div class="ptg mbm mtn"> <a title="品牌" href="misc.php?mod=tag&id=2752" target="_blank">品牌</a>, <a title="光纤" href="misc.php?mod=tag&id=1342" target="_blank">光纤</a>, <a title="望远镜" href="misc.php?mod=tag&id=157" target="_blank">望远镜</a>, <a title="激光器" href="misc.php?mod=tag&id=217" target="_blank">激光器</a></div> </div> <div id="comment_960917" class="cm"> </div> <div id="post_rate_div_960917"></div> </div> </div> </td></tr> <tr><td class="plc plm"> <div id="p_btn" class="mtw mbm hm cl"> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=favorite&type=thread&id=248350&formhash=647ac130" id="k_favorite" onclick="showWindow(this.id, this.href, 'get', 0);" onmouseover="this.title = $('favoritenumber').innerHTML + ' 人收藏'" title="收藏本帖"><i><img src="static/image/common/fav.gif" alt="收藏" />收藏<span id="favoritenumber" style="display:none">0</span></i></a> <a class="followp" 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光纤激光器一般出光通过尾纤出光，这段尾纤非增益介质，普通单模传导光纤，端部接一个准直器，就起到了你所说的准直+扩束功能，外形类似一个金属的小型单倍望远镜筒，里面普通点的就是个凹凸镜组合，结果是光束直径放大了，发散角变小了，但是面角积并不变（高斯光）。曾经问上光所一位工程师，问他最后这部分准直器是如何设计的，他说对着3米多远的墙壁，看看光斑够小稳定类圆就差不多了。我一颗汗就滴了下来，这就是国内光纤激光器的水平？</td></tr></table> </div> <div id="comment_962118" class="cm"> <h3 class="psth xs1"><span class="icon_ring vm"></span>点评</h3> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-90507.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=90507&size=small" /></a> <a href="http://club.oecr.com/space-uid-90507.html" class="xi2 xw1">optro</a> </div> <div class="psti"> 这个新鲜事，首先是从航宇张老板哪听来的，继续传播 <span class="xg1"> 发表于 2012-4-26 14:11</span> </div> </div> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-139362.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=139362&size=small" /></a> <a href="http://club.oecr.com/space-uid-139362.html" class="xi2 xw1">michael2012</a> </div> <div class="psti"> 实际生产中大都是这样的 <span class="xg1"> 发表于 2012-4-19 14:42</span> </div> </div> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-107795.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=107795&size=small" /></a> <a href="http://club.oecr.com/space-uid-107795.html" class="xi2 xw1">liluplanet</a> </div> <div class="psti"> 这玩意本来就是人眼校准，莫非你还有什么高招？ <span class="xg1"> 发表于 2011-12-27 12:56</span> </div> </div> </div> <div id="post_rate_div_962118"></div> </div> </div> </td></tr> <tr><td class="plc plm"> </td> </tr> <tr id="_postposition962118"></tr> <tr> <td class="pls"></td> <td class="plc" style="overflow:visible;"> <div class="po hin"> <div class="pob cl"> <em> <a class="fastre" href="forum.php?mod=post&action=reply&fid=7&tid=248350&repquote=962118&extra=page%3D1&page=1" onclick="showWindow('reply', this.href)">回复</a> <a class="replyadd" href="forum.php?mod=misc&action=postreview&do=support&tid=248350&pid=962118&hash=647ac130" 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<em>当前离线</em> </div><dl class="cl"> <dt>积分</dt><dd><a href="http://club.oecr.com/home.php?mod=space&uid=119803&do=profile" target="_blank" class="xi2">576</a></dd> </dl><div class="imicn"> <a href="http://club.oecr.com/home.php?mod=space&uid=119803&do=profile" target="_blank" title="查看详细资料"><img src="static/image/common/userinfo.gif" alt="查看详细资料" /></a> <a href="http://club.oecr.com/home.php?mod=magic&mid=showip&idtype=user&id=fengfeng1" id="a_showip_li_962137" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/showip.small.gif" alt="" /> IP卡</a> <a href="http://club.oecr.com/home.php?mod=magic&mid=checkonline&idtype=user&id=fengfeng1" id="a_repent_962137" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/checkonline.small.gif" alt="" /> 狗仔卡</a> </div> <div id="avatarfeed"><span id="threadsortswait"></span></div> </div> </div> <div> <div class="avatar"><a href="http://club.oecr.com/space-uid-119803.html" class="avtm" target="_blank"><img src="http://www.oecr.com/uc_server/avatar.php?uid=119803&size=middle" /></a></div> </div> </div> </td> <td class="plc"> <div class="pi"> <strong> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&ptid=248350&pid=962137" id="postnum962137" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>3</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon962137" src="static/image/common/online_member.gif" /> <em id="authorposton962137">发表于 2011-12-26 15:06:36</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=248350&page=1&authorid=119803" rel="nofollow">只看该作者</a> </div> </div> </div><div class="pct"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_962137"> 呵呵，像楼上说的，其实这样的情况很多的</td></tr></table> </div> <div id="comment_962137" class="cm"> </div> <div id="post_rate_div_962137"></div> 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this.href)"><img src="static//image/magic/showip.small.gif" alt="" /> IP卡</a> <a href="http://club.oecr.com/home.php?mod=magic&mid=checkonline&idtype=user&id=yctt" id="a_repent_962538" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/checkonline.small.gif" alt="" /> 狗仔卡</a> </div> <div id="avatarfeed"><span id="threadsortswait"></span></div> </div> </div> <div> <div class="avatar"><a href="http://club.oecr.com/space-uid-89023.html" class="avtm" target="_blank"><img src="http://www.oecr.com/uc_server/avatar.php?uid=89023&size=middle" /></a></div> </div> </div> </td> <td class="plc"> <div class="pi"> <strong> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&ptid=248350&pid=962538" id="postnum962538" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>4</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon962538" src="static/image/common/online_member.gif" /> <em id="authorposton962538">发表于 2011-12-27 14:44:04</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=248350&page=1&authorid=89023" rel="nofollow">只看该作者</a> </div> </div> </div><div class="pct"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_962538"> <div class="quote"><blockquote><font size="2"><font color="#999999">yctt 发表于 2011-12-26 14:31</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=962118&ptid=248350" target="_blank"><img id="aimg_Sp49H" 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 /> 光纤激光器一般出光通过尾纤出光，这段尾纤非增益介质，普通单模传导光纤，端部接一个准直器，就起到了你所 ...</blockquote></div><br /> 更定量的测呗，后面接个CCD相机光束质量分析仪 http://www.thorlabs.hk/NewGroupPage9.cfm?ObjectGroup_ID=3483。<br /> 测量发散角。总得限定一个上限啊</td></tr></table> </div> <div id="comment_962538" class="cm"> <h3 class="psth xs1"><span class="icon_ring vm"></span>点评</h3> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-90507.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=90507&size=small" /></a> <a href="http://club.oecr.com/space-uid-90507.html" class="xi2 xw1">optro</a> </div> <div class="psti"> 上光是半斤，您不过半两。您会测束散角？ <span class="xg1"> 发表于 2012-4-24 14:42</span> </div> </div> </div> <div id="post_rate_div_962538"></div> </div> </div> </td></tr> <tr><td class="plc plm"> </td> </tr> <tr id="_postposition962538"></tr> <tr> <td class="pls"></td> <td class="plc" style="overflow:visible;"> <div class="po hin"> <div class="pob cl"> <em> <a class="fastre" href="forum.php?mod=post&action=reply&fid=7&tid=248350&repquote=962538&extra=page%3D1&page=1" onclick="showWindow('reply', this.href)">回复</a> <a class="replyadd" href="forum.php?mod=misc&action=postreview&do=support&tid=248350&pid=962538&hash=647ac130" 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id="threadsortswait"></span></div> </div> </div> <div> <div class="avatar"><a href="http://club.oecr.com/space-uid-133680.html" class="avtm" target="_blank"><img src="http://www.oecr.com/uc_server/avatar.php?uid=133680&size=middle" /></a></div> </div> </div> </td> <td class="plc"> <div class="pi"> <strong> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&ptid=248350&pid=963468" id="postnum963468" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>5</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon963468" src="static/image/common/ico_lz.png" /> 楼主<span class="pipe">|</span> <em id="authorposton963468">发表于 2011-12-30 13:05:33</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=248350&page=1&authorid=133680" rel="nofollow">只看该作者</a> </div> </div> </div><div class="pct"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_963468"> <div class="quote"><blockquote><font size="2"><font color="#999999">yctt 发表于 2011-12-26 14:31</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=962118&ptid=248350" target="_blank"><img id="aimg_JXppp" 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 /> 光纤激光器一般出光通过尾纤出光，这段尾纤非增益介质，普通单模传导光纤，端部接一个准直器，就起到了你所 ...</blockquote></div><br /> 你的解释中提到的是单模传导光纤输出端为非增益介质，需接校准管和扩束器；那多模呢？<br /> 谢谢！</td></tr></table> </div> <div id="comment_963468" class="cm"> </div> <div id="post_rate_div_963468"></div> </div> </div> </td></tr> <tr><td class="plc plm"> </td> </tr> <tr id="_postposition963468"></tr> <tr> <td class="pls"></td> <td class="plc" style="overflow:visible;"> <div class="po hin"> <div class="pob cl"> <em> <a class="fastre" 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href="http://club.oecr.com/space-uid-89023.html" target="_blank" class="xw1" style="color: #FF99FF">yctt</a> </div> </div> <div class="p_pop blk bui card_gender_" id="userinfo964758" style="display: none; margin-top: -11px;"> <div class="m z"> <div id="userinfo964758_ma"></div> </div> <div class="i y"> <div> <strong><a href="http://club.oecr.com/space-uid-89023.html" target="_blank" class="xi2" style="color: #FF99FF">yctt</a></strong> <em>当前离线</em> </div><dl class="cl"> <dt>积分</dt><dd><a href="http://club.oecr.com/home.php?mod=space&uid=89023&do=profile" target="_blank" class="xi2">618</a></dd> </dl><div class="imicn"> <a href="http://club.oecr.com/home.php?mod=space&uid=89023&do=profile" target="_blank" title="查看详细资料"><img src="static/image/common/userinfo.gif" alt="查看详细资料" /></a> <a href="http://club.oecr.com/home.php?mod=magic&mid=showip&idtype=user&id=yctt" id="a_showip_li_964758" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/showip.small.gif" alt="" /> IP卡</a> <a href="http://club.oecr.com/home.php?mod=magic&mid=checkonline&idtype=user&id=yctt" id="a_repent_964758" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/checkonline.small.gif" alt="" /> 狗仔卡</a> </div> <div id="avatarfeed"><span id="threadsortswait"></span></div> </div> </div> <div> <div class="avatar"><a href="http://club.oecr.com/space-uid-89023.html" class="avtm" target="_blank"><img src="http://www.oecr.com/uc_server/avatar.php?uid=89023&size=middle" /></a></div> </div> </div> </td> <td class="plc"> <div class="pi"> <strong> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&ptid=248350&pid=964758" id="postnum964758" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>6</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon964758" src="static/image/common/online_member.gif" /> <em id="authorposton964758">发表于 2012-1-6 16:40:30</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=248350&page=1&authorid=89023" rel="nofollow">只看该作者</a> </div> </div> </div><div class="pct"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_964758"> 多模也是普通的多模光纤尾纤输出啊，都得接准直器，否则末端就像一个点光源，是发散光。不过一般光纤激光器光束质量会要求基模，用的大部分是黄色光纤</td></tr></table> </div> <div id="comment_964758" class="cm"> <h3 class="psth xs1"><span class="icon_ring vm"></span>点评</h3> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-89023.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=89023&size=small" /></a> <a href="http://club.oecr.com/space-uid-89023.html" class="xi2 xw1">yctt</a> </div> <div class="psti"> 垃圾不垃圾，不是一个小丑说了算的，呵呵 <span class="xg1"> 发表于 2012-5-8 09:11</span> </div> </div> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-90507.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=90507&size=small" /></a> <a href="http://club.oecr.com/space-uid-90507.html" class="xi2 xw1">optro</a> </div> <div class="psti"> 哦光纤发黄，大概是人心黄了，否则光纤一定有对兰、绿吸收，这是他们THOR家的垃圾。 <span class="xg1"> 发表于 2012-4-26 14:09</span> </div> </div> </div> <div id="post_rate_div_964758"></div> </div> </div> </td></tr> <tr><td class="plc plm"> </td> </tr> <tr id="_postposition964758"></tr> <tr> <td class="pls"></td> <td class="plc" style="overflow:visible;"> <div class="po hin"> <div class="pob cl"> <em> <a class="fastre" href="forum.php?mod=post&action=reply&fid=7&tid=248350&repquote=964758&extra=page%3D1&page=1" onclick="showWindow('reply', this.href)">回复</a> <a class="replyadd" href="forum.php?mod=misc&action=postreview&do=support&tid=248350&pid=964758&hash=647ac130" onclick="showWindow('login', this.href)" onmouseover="this.title = ($('review_support_964758').innerHTML ? $('review_support_964758').innerHTML : 0) + ' 人 支持'">支持 <span 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reload="1">checkmgcmn('post_964758')</script> </div> </div> </td> </tr> <tr class="ad"> <td class="pls"> </td> <td class="plc"> </td> </tr> </table> </div><div class="postaaa posta6" id="post_968255" ><table id="pid968255" class="plhin" summary="pid968255" cellspacing="0" cellpadding="0"> <tr> <td class="pls" rowspan="2"> <div id="favatar968255" class="pls favatar"> <div class="pi"> <div class="authi"><a href="http://club.oecr.com/space-uid-133680.html" target="_blank" class="xw1" style="color: #33FF00">heridong</a> </div> </div> <div class="p_pop blk bui card_gender_" id="userinfo968255" style="display: none; margin-top: -11px;"> <div class="m z"> <div id="userinfo968255_ma"></div> </div> <div class="i y"> <div> <strong><a href="http://club.oecr.com/space-uid-133680.html" target="_blank" class="xi2" style="color: #33FF00">heridong</a></strong> <em>当前离线</em> </div><dl class="cl"> <dt>积分</dt><dd><a href="http://club.oecr.com/home.php?mod=space&uid=133680&do=profile" target="_blank" class="xi2">135</a></dd> </dl><div class="imicn"> <a href="http://club.oecr.com/home.php?mod=space&uid=133680&do=profile" target="_blank" title="查看详细资料"><img src="static/image/common/userinfo.gif" alt="查看详细资料" /></a> <a href="http://club.oecr.com/home.php?mod=magic&mid=showip&idtype=user&id=heridong" id="a_showip_li_968255" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/showip.small.gif" alt="" /> IP卡</a> <a href="http://club.oecr.com/home.php?mod=magic&mid=checkonline&idtype=user&id=heridong" id="a_repent_968255" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/checkonline.small.gif" alt="" /> 狗仔卡</a> </div> <div id="avatarfeed"><span id="threadsortswait"></span></div> </div> </div> <div> <div class="avatar"><a href="http://club.oecr.com/space-uid-133680.html" class="avtm" target="_blank"><img src="http://www.oecr.com/uc_server/avatar.php?uid=133680&size=middle" /></a></div> </div> </div> </td> <td class="plc"> <div class="pi"> <strong> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&ptid=248350&pid=968255" id="postnum968255" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>7</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon968255" src="static/image/common/ico_lz.png" /> 楼主<span class="pipe">|</span> <em id="authorposton968255">发表于 2012-1-30 10:31:57</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=248350&page=1&authorid=133680" rel="nofollow">只看该作者</a> </div> </div> </div><div class="pct"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_968255"> <div class="quote"><blockquote><font size="2"><font color="#999999">yctt 发表于 2012-1-6 16:40</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=964758&ptid=248350" target="_blank"><img id="aimg_FLHNC" 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 /> 多模也是普通的多模光纤尾纤输出啊，都得接准直器，否则末端就像一个点光源，是发散光。不过一般光纤激光器 ...</blockquote></div><br /> 谢谢！</td></tr></table> </div> <div id="comment_968255" class="cm"> </div> <div id="post_rate_div_968255"></div> </div> </div> </td></tr> <tr><td class="plc plm"> </td> </tr> <tr id="_postposition968255"></tr> <tr> <td class="pls"></td> <td class="plc" style="overflow:visible;"> <div class="po hin"> <div class="pob cl"> <em> <a class="fastre" href="forum.php?mod=post&action=reply&fid=7&tid=248350&repquote=968255&extra=page%3D1&page=1" onclick="showWindow('reply', this.href)">回复</a> <a class="replyadd" href="forum.php?mod=misc&action=postreview&do=support&tid=248350&pid=968255&hash=647ac130" onclick="showWindow('login', this.href)" onmouseover="this.title = ($('review_support_968255').innerHTML ? $('review_support_968255').innerHTML : 0) + ' 人 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</div><dl class="cl"> <dt>积分</dt><dd><a href="http://club.oecr.com/home.php?mod=space&uid=35970&do=profile" target="_blank" class="xi2">294</a></dd> </dl><div class="imicn"> <a href="http://club.oecr.com/home.php?mod=space&uid=35970&do=profile" target="_blank" title="查看详细资料"><img src="static/image/common/userinfo.gif" alt="查看详细资料" /></a> <a href="http://club.oecr.com/home.php?mod=magic&mid=showip&idtype=user&id=optapollo" id="a_showip_li_968269" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/showip.small.gif" alt="" /> IP卡</a> <a href="http://club.oecr.com/home.php?mod=magic&mid=checkonline&idtype=user&id=optapollo" id="a_repent_968269" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/checkonline.small.gif" alt="" /> 狗仔卡</a> </div> <div id="avatarfeed"><span id="threadsortswait"></span></div> </div> </div> <div> <div class="avatar"><a href="http://club.oecr.com/space-uid-35970.html" class="avtm" target="_blank"><img src="http://www.oecr.com/uc_server/avatar.php?uid=35970&size=middle" /></a></div> </div> </div> </td> <td class="plc"> <div class="pi"> <strong> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&ptid=248350&pid=968269" id="postnum968269" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>8</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon968269" src="static/image/common/online_member.gif" /> <em id="authorposton968269">发表于 2012-1-30 12:22:14</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=248350&page=1&authorid=35970" rel="nofollow">只看该作者</a> </div> </div> </div><div class="pct"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_968269"> 1.22*Lamda/NA, so you need large NA to bring down the focus spot. For fixed focal length, large NA means large beam diameter. That's why you need expand beam first.</td></tr></table> </div> <div id="comment_968269" class="cm"> <h3 class="psth xs1"><span class="icon_ring vm"></span>点评</h3> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-90507.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=90507&size=small" /></a> <a href="http://club.oecr.com/space-uid-90507.html" class="xi2 xw1">optro</a> </div> <div class="psti"> 您这个光学知识，有辱王先生的知识。 <span class="xg1"> 发表于 2012-4-26 14:07</span> </div> </div> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-90507.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=90507&size=small" /></a> <a href="http://club.oecr.com/space-uid-90507.html" class="xi2 xw1">optro</a> </div> <div class="psti"> 您是阿婆罗公司的？做光学设计？ <span class="xg1"> 发表于 2012-4-26 10:36</span> </div> </div> </div> <div id="post_rate_div_968269"></div> </div> </div> </td></tr> <tr><td class="plc plm"> </td> </tr> <tr id="_postposition968269"></tr> <tr> <td class="pls"></td> <td class="plc" style="overflow:visible;"> <div class="po hin"> <div class="pob cl"> <em> <a class="fastre" href="forum.php?mod=post&action=reply&fid=7&tid=248350&repquote=968269&extra=page%3D1&page=1" onclick="showWindow('reply', this.href)">回复</a> <a class="replyadd" href="forum.php?mod=misc&action=postreview&do=support&tid=248350&pid=968269&hash=647ac130" onclick="showWindow('login', this.href)" onmouseover="this.title = ($('review_support_968269').innerHTML ? 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For fixed focal length, large NA m ...</blockquote></div><br /> 多谢你的解释！<br /> 但我还是没明白：“for fixed focal length, large NA means large beam diameter, that is why you need expand the beam first"<br /> 这句话的字面意思是：“对于固定的聚焦长度/距离，NA值大意味着光束直径大，因此你需要先扩束。” 我不明白的是扩束和光束直径大的什么因果关系？为什么要先扩束呢？ 能否解释清楚一下？<br /> 谢啦！</td></tr></table> </div> <div id="comment_995112" class="cm"> <h3 class="psth xs1"><span class="icon_ring vm"></span>点评</h3> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-89023.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=89023&size=small" /></a> <a href="http://club.oecr.com/space-uid-89023.html" class="xi2 xw1">yctt</a> </div> <div class="psti"> optro像您这种网闹，大家对你基本不理睬。建议你像凤姐学学，也无需将自己局限在行业内，大可向娱乐圈发展 <span class="xg1"> 发表于 2012-5-8 09:10</span> </div> </div> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-90507.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=90507&size=small" /></a> <a href="http://club.oecr.com/space-uid-90507.html" class="xi2 xw1">optro</a> </div> <div class="psti"> 您最好不要明白的好 <span class="xg1"> 发表于 2012-4-26 14:06</span> </div> </div> </div> <div id="post_rate_div_995112"></div> </div> </div> </td></tr> <tr><td class="plc plm"> </td> </tr> <tr id="_postposition995112"></tr> <tr> <td class="pls"></td> <td class="plc" style="overflow:visible;"> <div class="po hin"> <div class="pob cl"> <em> <a class="fastre" href="forum.php?mod=post&action=reply&fid=7&tid=248350&repquote=995112&extra=page%3D1&page=1" onclick="showWindow('reply', this.href)">回复</a> <a class="replyadd" href="forum.php?mod=misc&action=postreview&do=support&tid=248350&pid=995112&hash=647ac130" onclick="showWindow('login', this.href)" onmouseover="this.title = ($('review_support_995112').innerHTML ? $('review_support_995112').innerHTML : 0) + ' 人 支持'">支持 <span id="review_support_995112"></span></a> <a 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<tr class="ad"> <td class="pls"> </td> <td class="plc"> </td> </tr> </table> <script type="text/javascript" reload="1"> aimgcount[995112] = ['CqUQO']; attachimggroup(995112); var aimgfid = 0; </script> </div><div class="postaaa posta10" id="post_995243" ><table id="pid995243" class="plhin" summary="pid995243" cellspacing="0" cellpadding="0"> <tr> <td class="pls" rowspan="2"> <div id="favatar995243" class="pls favatar"> <div class="pi"> <div class="authi"><a href="http://club.oecr.com/space-uid-140441.html" target="_blank" class="xw1" style="color: #33CC00">adobe</a> </div> </div> <div class="p_pop blk bui card_gender_" id="userinfo995243" style="display: none; margin-top: -11px;"> <div class="m z"> <div id="userinfo995243_ma"></div> </div> <div class="i y"> <div> <strong><a href="http://club.oecr.com/space-uid-140441.html" target="_blank" class="xi2" style="color: #33CC00">adobe</a></strong> <em>当前离线</em> </div><dl class="cl"> <dt>积分</dt><dd><a href="http://club.oecr.com/home.php?mod=space&uid=140441&do=profile" target="_blank" class="xi2">231</a></dd> </dl><div class="imicn"> <a href="http://club.oecr.com/home.php?mod=space&uid=140441&do=profile" target="_blank" title="查看详细资料"><img src="static/image/common/userinfo.gif" alt="查看详细资料" /></a> <a href="http://club.oecr.com/home.php?mod=magic&mid=showip&idtype=user&id=adobe" id="a_showip_li_995243" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/showip.small.gif" alt="" /> IP卡</a> <a href="http://club.oecr.com/home.php?mod=magic&mid=checkonline&idtype=user&id=adobe" id="a_repent_995243" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/checkonline.small.gif" alt="" /> 狗仔卡</a> </div> <div id="avatarfeed"><span id="threadsortswait"></span></div> </div> </div> <div> <div class="avatar"><a href="http://club.oecr.com/space-uid-140441.html" class="avtm" target="_blank"><img src="http://www.oecr.com/uc_server/avatar.php?uid=140441&size=middle" /></a></div> </div> </div> </td> <td class="plc"> <div class="pi"> <strong> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&ptid=248350&pid=995243" id="postnum995243" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>11</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon995243" src="static/image/common/online_member.gif" /> <em id="authorposton995243">发表于 2012-4-24 15:37:28</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=248350&page=1&authorid=140441" rel="nofollow">只看该作者</a> </div> </div> </div><div class="pct"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_995243"> 扩束的目的就是将光斑直径扩大，满足大NA的要求</td></tr></table> </div> <div id="comment_995243" class="cm"> <h3 class="psth xs1"><span class="icon_ring vm"></span>点评</h3> <div class="pstl xs1 cl"> <div class="psta vm"> <a href="http://club.oecr.com/space-uid-90507.html" c="1"><img src="http://www.oecr.com/uc_server/avatar.php?uid=90507&size=small" /></a> <a href="http://club.oecr.com/space-uid-90507.html" class="xi2 xw1">optro</a> </div> <div class="psti"> 您真懂事，会说话了，最好不说 <span class="xg1"> 发表于 2012-4-26 14:05</span> </div> </div> </div> <div id="post_rate_div_995243"></div> </div> </div> </td></tr> <tr><td class="plc plm"> </td> </tr> <tr id="_postposition995243"></tr> <tr> <td class="pls"></td> <td class="plc" style="overflow:visible;"> <div class="po hin"> <div class="pob cl"> <em> <a class="fastre" href="forum.php?mod=post&action=reply&fid=7&tid=248350&repquote=995243&extra=page%3D1&page=1" onclick="showWindow('reply', this.href)">回复</a> <a class="replyadd" href="forum.php?mod=misc&action=postreview&do=support&tid=248350&pid=995243&hash=647ac130" onclick="showWindow('login', this.href)" onmouseover="this.title = ($('review_support_995243').innerHTML 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</ul> <script type="text/javascript" reload="1">checkmgcmn('post_995243')</script> </div> </div> </td> </tr> <tr class="ad"> <td class="pls"> </td> <td class="plc"> </td> </tr> </table> </div><div class="postaaa posta11" id="post_995984" ><table id="pid995984" class="plhin" summary="pid995984" cellspacing="0" cellpadding="0"> <tr> <td class="pls" rowspan="2"> <div id="favatar995984" class="pls favatar"> <div class="pi"> <div class="authi"><a href="http://club.oecr.com/space-uid-18999.html" target="_blank" class="xw1" style="color: #FF00CC">kkkyt</a> </div> </div> <div class="p_pop blk bui card_gender_" id="userinfo995984" style="display: none; margin-top: -11px;"> <div class="m z"> <div id="userinfo995984_ma"></div> </div> <div class="i y"> <div> <strong><a href="http://club.oecr.com/space-uid-18999.html" target="_blank" class="xi2" style="color: #FF00CC">kkkyt</a></strong> <em>当前离线</em> </div><dl class="cl"> <dt>积分</dt><dd><a href="http://club.oecr.com/home.php?mod=space&uid=18999&do=profile" target="_blank" class="xi2">4846</a></dd> </dl><div class="imicn"> <a href="http://club.oecr.com/home.php?mod=space&uid=18999&do=profile" target="_blank" title="查看详细资料"><img src="static/image/common/userinfo.gif" alt="查看详细资料" /></a> <a href="http://club.oecr.com/home.php?mod=magic&mid=showip&idtype=user&id=kkkyt" id="a_showip_li_995984" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/showip.small.gif" alt="" /> IP卡</a> <a href="http://club.oecr.com/home.php?mod=magic&mid=checkonline&idtype=user&id=kkkyt" id="a_repent_995984" class="xi2" onclick="showWindow(this.id, this.href)"><img src="static//image/magic/checkonline.small.gif" alt="" /> 狗仔卡</a> </div> <div id="avatarfeed"><span id="threadsortswait"></span></div> </div> </div> <div> <div class="avatar"><a href="http://club.oecr.com/space-uid-18999.html" class="avtm" target="_blank"><img src="http://www.oecr.com/uc_server/avatar.php?uid=18999&size=middle" /></a></div> </div> </div> </td> <td class="plc"> <div class="pi"> <strong> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&ptid=248350&pid=995984" id="postnum995984" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>12</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon995984" src="static/image/common/online_member.gif" /> <em id="authorposton995984">发表于 2012-4-26 08:13:49</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=248350&page=1&authorid=18999" rel="nofollow">只看该作者</a> </div> </div> </div><div class="pct"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_995984"> 看看不说话。。。</td></tr></table> </div> <div id="comment_995984" class="cm"> </div> <div id="post_rate_div_995984"></div> </div> </div> </td></tr> <tr><td 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