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onkeyup="$('fj_btn').href='forum.php?mod=redirect&ptid=264809&authorid=0&postno='+this.value" onkeydown="if(event.keyCode==13) {window.location=$('fj_btn').href;return false;}" title="跳转到指定楼层" /> <a href="javascript:;" id="fj_btn" class="z" title="跳转到指定楼层"><img src="static/image/common/fj_btn.png" alt="跳转到指定楼层" class="vm" /></a> </div> <strong> <a href="http://bbs.oecr.com/thread-264809-1-1.html" id="postnum1135902" onclick="setCopy(this.href, '帖子地址复制成功');return false;"> <em>1</em>楼</a> </strong> <div class="pti"> <div class="pdbt"> </div> <div class="authi"> <img class="authicn vm" id="authicon1135902" src="static/image/common/online_member.gif" /> <em id="authorposton1135902">发表于 2014-11-19 15:33:08</em> <span class="pipe">|</span> <a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=264809&page=1&authorid=128858" rel="nofollow">只看该作者</a> <span class="none"><img src="static/image/common/arw_r.gif" class="vm" alt="回帖奖励" /></span> <span class="pipe show">|</span><a href="http://bbs.oecr.com/forum.php?mod=viewthread&tid=264809&extra=&ordertype=1" class="show">倒序浏览</a> <span class="pipe show">|</span><a href="javascript:;" onclick="readmode($('thread_subject').innerHTML, 1135902);" class="show">阅读模式</a> </div> </div> </div><div class="pct"><style type="text/css">.pcb{margin-right:0}</style><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1135902"> 我们只有一双眼睛，请注意保护！<br /> <br /> <a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>标准和分类<br /> 美国激光安全标准ANSI Z136.1<br /> ANSI Z136.1标准：通过光密度(OD, Optical Density)来进行衡量。光密度OD与透过率T之间的逻辑关系：D=-log10 T。<br /> <br /> 欧洲激光安全标准EN207/EN208<br /> EN207/EN208标准：考虑光密度OD，此外还需要考虑损伤阈值(功率/能量密度随时间的变化)。<br /> <br /> 依据美国激光安全标准ANSI Z136.1和欧洲激光安全标准EN207/EN208，激光可按如下标准进行分类。<br /> 新势力光电 www.newopto.com<br /> <br /> 1 无危险的 不需要激光防护眼镜<br /> 1M 眼镜安全的可见激光(400-700nm)，不带光学放大 不需要激光防护眼镜<br /> 2 眼镜安全的可见激光(400-700nm)，0.25秒内眨眼安全 不需要激光防护眼镜<br /> 2M 眼镜安全的可见激光(400-700nm)，0.25秒内眨眼安全， 带光学放大 建议使用激光防护眼镜<br /> 3R 直视激光可能不安全，最大允许暴露值(MPE)，在可见光部分是2级激光的5倍，在不可见光部分是1级激光的5倍 建议使 用激光防护眼镜<br /> 3B 直视激光不安全，漫反射激光尽量避免 建议使用激光防护眼镜<br /> 4 直视激光及其漫反射激光都不安全 必须使用激光防护眼镜<br /> <br /> 光密度Optical Density 透过率Transmission% 衰减系数Attenuation Factor<br /> 0 100% 1<br /> 1 10% 10<br /> 2 1% 100<br /> 3 0.1% 1000<br /> 4 0.01% 10000<br /> 5 0.001% 100000<br /> 6 0.0001% 1000000<br /> 7 0.00001% 10000000<br /> <br /> 激光防护眼镜选择指导<br /> <br /> 1、激光器特性：激光器的输出波长、功率密度。<br /> 2、光密度Optical Density (OD)：OD数值越大，激光防护眼镜的防护能力越强。<br /> 3、可见光透过率Visible Light Transmittance (VLT)：VLT数值低于20%，激光防护眼镜需要<br /> 更多咨询尽在 新势力光电 www.newopto.com<br /> <br /> <font size="2"><font color="gray"> <img id="aimg_JEn80" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" file="http://bbs.oecr.com/xwb/images/bgimg/icon_logo.png" onmouseover="img_onmouseoverfunc(this)" lazyloadthumb="1" border="0" alt="" /> 该贴已经同步到 <a href="http://api.t.sina.com.cn/2164742914/statuses/3778643971507383" 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