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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">美国麻省理工科学家最近研制出一种激光照相机 </h1> <p class="xg1"> 时间：2011-2-12 10:30<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(1503)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=1585&idtype=aid" title="查看全部评论"><em id="_commentnum">1</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>美国麻省理工科学家最近研制出一种照相机，能拍摄到来自非正面的目标。这种照相机安装了一个飞秒激光器，当其发出的极短暂光脉冲被某个物体（比如门或镜子）反射后，可在光线返回之前拍摄第二个目标图像，然后利用数 ...</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content">据美国<a href="http://theory.oecr.com" target="_blank" class="relatedlink">物理</a>学家组织网报道，美国麻省理工科学家最近研制出一种<a href="http://display.oecr.com" target="_blank" class="relatedlink">照相</a>机，能拍摄到来自非正面的目标。这种照相机安装了一个飞秒<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>器，当其发出的极短暂光脉冲被某个物体（比如门或镜子）反射后，可在光线返回之前拍摄第二个目标图像，然后利用数学算法将这些像素信息重建，就能获得那些隐蔽景物的图像。<BR><BR>激光照相机由麻省理工教授拉瑞马斯·瑞斯卡及其研究小组设计，称为“飞秒瞬间成像系统”（femtosecond transient imaging system）。这种相机能在极短时间内捕获光线，大约是千万亿分之一秒。他解释说，通过不断收集光线，计算每个像素到达照相机的时间和距离，就能按照所处环境生成一种“三维实时图像”。<BR><BR>“这就像不用X射线却有了X射线般的眼睛，”瑞斯卡说，“我们将围绕着目标，而不是通过它。”<BR><BR>这种相机目前仍处于早期研发阶段，研究人员正在探究如何精确合成更复杂的图像。该相机系统将有广泛的应用，比如用于搜救任务，在垮塌或失火建筑中寻找幸存者，也能避免汽车在隐蔽拐角处相撞，在工业上还可用于<a href="http://machine.oecr.com" target="_blank" class="relatedlink">机械</a>探测以检查隐蔽物体。此外，它和生物医学图像也有相似之处，可让医生用内窥镜观察身体内部被遮住的区域，便携式的内窥镜成像系统再过两年就可能出现。</td></tr></table> <!--[diy=diycontentbottom]--><div id="diycontentbottom" class="area"></div><!--[/diy]--> <script src="data/cache/home.js?eOg" type="text/javascript"></script> <div id="click_div"><table cellpadding="0" cellspacing="0" class="atd"> <tr><td> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=1&idtype=aid&id=1585&hash=9bd7f32de2c13fd383131fcc4e01ebea&handlekey=clickhandle" id="click_aid_1585_1" onclick="showWindow(this.id, this.href);doane(event);"> <img src="static/image/click/jidan.gif" alt="" /><br />鸡蛋</a> </td> <td> <a 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