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$('sharenumber').innerHTML + ' 人分享'"><i><img 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=103526" 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=103526&hash=08be313c" 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">2</span></i></a> <a id="recommend_subtract" href="forum.php?mod=misc&action=recommend&do=subtract&tid=103526&hash=08be313c" 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-113843.html" target="_blank" class="xi2"><img src="http://www.oecr.com/uc_server/avatar.php?uid=113843&size=small" /></a> <span class="tit_author"> <a href="http://club.oecr.com/space-uid-113843.html">laser2010SZ</a> </span> </div> <div class="date"><span>发布时间:</span> 2010-5-31 17:57</div> <div class="album_info"> <h3>正文摘要: </h3> <p> 本帖最后由 laser2010SZ 于 2010-5-31 17:59 编辑 这里牛人多，再次请教 我在一个网站看到一家公司有个图片描述三维动态原理。 通过移动凹透镜来改变焦距，补偿能量。有一点小弟不明白， 凸透镜不是平行光才 ...</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_649814" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-5477.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=5477&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-5477.html" target="_blank" class="xi2">mengfh</a><em id="author_649814"> 发表于</em> <span class="xg1 xw0">2010-6-2 10:29:36</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_649814"> 又见“半路出家”者，呵呵</td></tr></table> </div> <div id="comment_649814" class="cm"> </div> <div id="post_rate_div_649814"></div> </div> </dd> </dl> </div> <div id="post_649763" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-103039.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=103039&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-103039.html" target="_blank" class="xi2">ashzj2005</a><em id="author_649763"> 发表于</em> <span class="xg1 xw0">2010-6-1 22:07:22</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_649763"> 一般凹凸透镜配合的镜头组比单透镜聚焦的效果好，因为部分设计都矫正相差。<br /> 凹凸透镜镜头组一般有扩束作用和汇聚作用，三维动态，呵呵，这个很成熟了，你看这个是振镜工作台的，利用振镜这个就是速度快。一般上面还有CCD监视的。</td></tr></table> </div> <div id="comment_649763" class="cm"> </div> <div id="post_rate_div_649763"></div> </div> </dd> </dl> </div> <div id="post_649732" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-113843.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=113843&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-113843.html" target="_blank" class="xi2">laser2010SZ</a><em id="author_649732"> 发表于</em> <span class="xg1 xw0">2010-6-1 18:19:24</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_649732"> <img src="static/image/smiley/default/em34.gif" smilieid="63" border="0" alt="" />谢谢你的回答</td></tr></table> </div> <div id="comment_649732" class="cm"> </div> <div id="post_rate_div_649732"></div> </div> </dd> </dl> </div> <div id="post_649596" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-83803.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=83803&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-83803.html" target="_blank" class="xi2">弥勒</a><em id="author_649596"> 发表于</em> <span class="xg1 xw0">2010-6-1 09:32:24</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_649596"> “凸透镜不是平行光才会聚焦么？”绝对不是。“凹透镜的移动只是改变了发散角而已吧？”也不对。“发散的光经过凸透镜后可以聚焦么？”可以。“不同发散角的光经过凸透镜后焦距也会变化？”最好不要说焦距，说焦点（或者束腰）位置。好像没什么变化。<br /> <br /> 不管是几何光束还是激光光束，都满足凸透镜物像关系。上图系统输入的应该是准直激光束，凹透镜的移动基本上不改变发散角。对于凸透镜来说，凹透镜就相当于一个球光源，移动凹透镜，相当于移动的凸透镜的物距，根据物像关系，凸透镜的像距一定也会相应改变。所以，调整凹透镜的位置，就能调整输出光束的束腰位置。</td></tr></table> </div> <div id="comment_649596" class="cm"> </div> <div id="post_rate_div_649596"></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" >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" 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