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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=62" 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">变色眼镜变色原理 </h1> <p class="xg1"> 时间：2011-9-22 10:39<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(2567)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=2440&idtype=aid" title="查看全部评论"><em id="_commentnum">2</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=62" 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>在阳光下会变暗的太阳镜或处方眼镜是由Corning公司在20世纪60年代末最先研制出来的，而这种变色眼镜的普及则是在20世纪90年代由Transitions公司完成的。实际上，由于Transitions品牌极受欢迎，因此这些镜片经常被称 ...</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">在阳光下会变暗的太阳镜或处方眼镜是由Corning公司在20世纪60年代末最先研制出来的，而这种变色眼镜的普及则是在20世纪90年代由Transitions公司完成的。实际上，由于Transitions品牌极受欢迎，因此这些镜片经常被称为Transition镜片。变色眼镜的标准名称为光致变色或光敏眼镜，指的是镜片与照射其上的紫外线（UV）发生了特定的化学反应。 <br><br>光致变色镜片中含有数百万个氯化银或卤化银等物质的分子。在不含紫外光的可见光下，这些分子呈透明状。而室内的光线环境中通常都没有紫外线。但是当这些分子暴露于紫外线下时（例如在阳光的直接照射下），就会经历一个可改变其形状的化学过程。新的分子结构会吸收一部分可见光，从而使镜片变暗。发生形状改变的分子数目随紫外线强度的不同而不同。<br><br>当您走进室内，不再受紫外光的照射时，将会发生一个不同的化学反应。在紫外线不存在的情况下，分子会“迅速恢复”到原来的形状，从而丧失吸光特性。在整个过程中，正逆两个方向的反应都非常迅速。<br><br>Corning公司最初生产的PhotoBrown和PhotoGrey<a href="http://b.oecr.com/sell" target="_blank" class="relatedlink">产品</a>的镜片由玻璃制成，分子平均分布在整个镜片中。对于处方眼镜来说，这种制作方法存在非常明显的问题：不同部位的镜片厚度是不同的。稍微厚一些的地方颜色会显得暗一些。但是随着塑料镜片的日益普及，人们又研发出了一种新方法：将镜片在化学药水里浸泡后，光致变色分子就可进入到塑料内部大约150微米深的位置。这比一个简单的涂层要好得多，因为涂层只有大约5微米厚，无法提供足够的分子来使镜片变得足够暗。变色镜片制造业的领先者Transitions已经推广普及了这种塑料镜片吸附<a href="http://optics.oecr.com" target="_blank" class="relatedlink">工艺</a>。<br><br>有关变色镜片的一个重要注意事项是：因为它们只和紫外光发生反应，而不与可见光发生反应，因此在有些环境中，镜片不会变暗。最典型的例子就是在汽车里。因为车窗阻挡了大部分的紫外光，所以光致变色镜片不会变暗。正因为如此，很多变色太阳镜的镜片上会覆盖一定量的染色物质。 <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=3360374424130050" 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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