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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">夜光产品发光原理 </h1> <p class="xg1"> 时间：2011-9-22 10:38<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(2648)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=2439&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>如果您曾经见过任何这类产品，就一定知道它们全都需要“充电”——把它们先放在光下照射，然后再拿到暗处。它们一般只能在暗处发光十分钟。一些新型的夜光产品能够持续发光几小时。这些光通常只是轻柔的绿光，不是十 ...</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">您在各种地方都能看到夜光<a href="http://b.oecr.com/sell" target="_blank" class="relatedlink">产品</a>，但是最常见的还是在玩具中，比如夜光悠悠球、夜光球、夜光移动电话等，甚至（如果您相信的话）还有夜光睡裤！这些东西让人们在晚上一眼就能发现！ <br><br>如果您曾经见过任何这类产品，就一定知道它们全都需要“充电”——把它们先放在光下照射，然后再拿到暗处。它们一般只能在暗处<a href="http://light.oecr.com" target="_blank" class="relatedlink">发光</a>十分钟。一些新型的夜光产品能够持续发光几小时。这些光通常只是轻柔的绿光，不是十分明亮。您得在接近全黑的环境下才能觉察到它。<br><br>所有夜光产品都含有荧光物质。所谓荧光物质是一种被激发后可以发出可见光的物质。我们最常看到荧光物质的两个地方是电视屏幕/计算机<a href="http://display.oecr.com" target="_blank" class="relatedlink">显示</a>器以及荧光灯。在电视屏幕中，<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>束撞击并激发荧光物质（有关详细信息，请参见电视工作原理）。在荧光灯中，则由紫外线来激发荧光物质。在这两个地方，我们看到的都是可见光。彩色电视屏幕中实际上有数以千计微小的荧光图像元素，它们发出三种不同颜色的光（红色、绿色和蓝色）。在荧光灯中，通常使用多种荧光物质的混合物来制造一种看起来为白色的光。<br><br>化学家们制造出了上千种可以充当荧光物质的<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>。这种物质有三个特性：<br>•激发所需的能量的类型 <br>•发出的可见光的颜色 <br>•激发后的发光时间（即荧光物质发光的持续时间） <br><br>制造一种夜光玩具首先需要一种荧光物质。它能够被普通的光线激发，并且能够持续较长的发光时间。拥有这些属性的两种荧光物质是硫化锌和铝酸锶。铝酸锶是较新的材料——您在“超级”夜光玩具中看到的就是它。它的发光持续时间比硫化锌长很多。大多数的夜光产品是将荧光物质混合进塑料中，然后再用模具塑造成形的。 <br><br>您偶尔也会碰到一些不需要补充能量的发光物质。最常见的就是名贵手表。在这些产品中，荧光物质和一种放射性元素混合在一起，放射性辐射（请查看核辐射揭秘）持续地激发荧光物质。在过去，使用的放射性元素是镭，它的半衰期为1600年的。今天，大多数的发光表使用的是氢的放射性同位素“氚”（它的半衰期长12年）或者钷（一种半衰期约为三年的人造放射性元素）。 <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=3360374122496515" 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 href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=1&idtype=aid&id=2439&hash=9211bc6e03e3762a2ac09b6ced162fc8&handlekey=clickhandle" id="click_aid_2439_1" onclick="showWindow(this.id, this.href);doane(event);"> <img src="static/image/click/jidan.gif" alt="" /><br />鸡蛋</a> </td> <td> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=2&idtype=aid&id=2439&hash=9211bc6e03e3762a2ac09b6ced162fc8&handlekey=clickhandle" id="click_aid_2439_2" onclick="showWindow(this.id, this.href);doane(event);"> <div class="atdc"> <div class="ac4" style="height:14px;"> <em>2</em> </div> </div> <img src="static/image/click/xianhua.gif" alt="" /><br />鲜花</a> </td> <td> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=3&idtype=aid&id=2439&hash=9211bc6e03e3762a2ac09b6ced162fc8&handlekey=clickhandle" id="click_aid_2439_3" onclick="showWindow(this.id, this.href);doane(event);"> <div class="atdc"> <div class="ac1" style="height:50px;"> <em>7</em> </div> </div> <img src="static/image/click/woshou.gif" alt="" /><br />握手</a> </td> <td> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=4&idtype=aid&id=2439&hash=9211bc6e03e3762a2ac09b6ced162fc8&handlekey=clickhandle" id="click_aid_2439_4" onclick="showWindow(this.id, this.href);doane(event);"> <img src="static/image/click/leiren.gif" alt="" /><br />雷人</a> </td> <td> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=click&op=add&clickid=5&idtype=aid&id=2439&hash=9211bc6e03e3762a2ac09b6ced162fc8&handlekey=clickhandle" id="click_aid_2439_5" onclick="showWindow(this.id, this.href);doane(event);"> <div class="atdc"> <div class="ac3" style="height:14px;"> 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