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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=58" 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">达光学分辨率极限图像问世 </h1> <p class="xg1"> 时间：2012-8-20 09:30<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(6437)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=2945&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=58" 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>人类一直在追求分辨率更高的显像技术，以获得更清晰的图像，一项新研究让“最清晰”图像成为现实。这一图像在每英寸（约合2.54厘米）距离上可以有10万个像素点，这是光学分辨领域无法超越的理论极限。</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"><P>人类一直在追求分辨率更高的显像技术，以获得更清晰的图像，一项新研究让“最清晰”图像成为现实。这一图像在每英寸（约合2.54厘米）距离上可以有10万个像素点，这是光学分辨领域无法超越的<a href="http://theory.oecr.com" target="_blank" class="relatedlink">理论</a>极限。<BR> <BR>英国《自然—<a href="http://material.oecr.com" target="_blank" class="relatedlink">纳米</a>技术》杂志8月12日在线刊登报告说，新加坡研究人员完成了这样一幅图像。这是一幅常用作图像<a href="http://opticaltest.oecr.com" target="_blank" class="relatedlink">测试</a>的彩色女子头像“莱娜”，整幅头像大小只有50微米见方，它的清晰程度达到光学分辨率的理论极限，即在每250纳米距离上安放一个像素点。<BR> <BR>之所以说这是理论极限，是因为光的衍射性质决定，如果两个像素点之间的距离低于250纳米，它们发出或反射的光就会互相影响，使图像模糊。我们在日常生活中也有这样的经验，如果两个物体靠得太近，它们快要接触的边缘位置看起来会变得模糊。</P> <P><A href="http://www.oecr.com/data/attachment/portal/201208/20/092927z8nq1hixl6rht8rh.jpg" target=_blank><IMG src="http://www.oecr.com/data/attachment/portal/201208/20/092927z8nq1hixl6rht8rh.jpg"></A></P> <P> 要达到这样的清晰度，使用颜料喷涂等传统手段是非常困难的。研究人员此次利用了纳米尺度上的光学原理。“莱娜”的每个像素点实际上是由4个纳米级的金属柱组成的，根据等离子共振原理，如果调整4个金属柱的大小和间距，它们作为一个整体反射出的光就会呈现出不同颜色，通过这种方法可得到一个全彩色的“颜料盘”。<BR> <BR>不过，用这种技术制成的图像已经远超出人眼的分辨能力，要用光学显微镜才能分辨，而它的分辨率也已经达到了光学显微镜的极限。<BR> <BR>研究人员表示，这项技术有多种应用前景，比如可用来在目标物体的某个角落印下极小的水印，起到保密或验证的作用；还可用于制造新一代光盘，凭借密集的像素点储存大量信息。</P> <DIV><FONT color="#808080" size=2><IMG src="http://www.oecr.com/xwb/images/bgimg/icon_logo.png"> 已同步至 <a href="http://ome.ac.cn/index.php?m=show&id=3481036610947444" target="_blank">update的微博</A></FONT></DIV></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 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