<P>我那个21的头也还不错,亮度十分好,1米处接近聚光良好的LS3W光斑 TXO,远了就不成了,光色纯白,关键是发射角度大,全黑环境下有效距离20米左右。</P>
<P>如果用反光杯的手电,光斑打在前方10米处时,车前3-4米就比较暗了,光斑打在5米处,前方10处又照不到了。因为一般手电比较聚光嘛,放在自行车上就不太实用了,走路够用,骑车的话照亮的范围小。泛光在全黑环境下很重要。</P>
<P>转一个<STRONG><FONT face=Verdana>erin0919坛友的发言和照片。原贴地址<a href="http://www.shoudian.org/dispbbs.asp?boardID=30&ID=17321&page=1" target="_blank" >http://www.shoudian.org/dispbbs.asp?boardID=30&ID=17321&page=1</A></FONT></STRONG></P>
<DIV class=quote><B>以下是引用<I>erin0919</I>在2006-3-28 9:51:01的发言:</B><br>
<P>当初<FONT face="Times New Roman">HD45</FONT>刚露脸时,怎么也没有想到我今天会去买。因为它那大头和小身子实在有点比例失调的感觉,那时就纳闷为什么要弄个这么大的头,难道只为了聚光吗?太夸张了吧。后来才发现<FONT face="Times New Roman">HD45</FONT>的大头并不是一味追求聚光的,而是为追求光斑的实用性所设计的。<FONT face="Times New Roman">HD45</FONT>的反光杯直径<FONT face="Times New Roman">45mm, </FONT>深度<FONT face="Times New Roman">44mm, </FONT>橘皮全铝打造。<FONT face="Times New Roman"> </FONT>光斑比较图〖<FONT face="Times New Roman">HD45</FONT>图一〗是<FONT face="Times New Roman">HD45</FONT>右和<FONT face="Times New Roman">27mm</FONT>反光杯手电左的对比(<FONT face="Times New Roman">Aleph1/</FONT>探索者系列<FONT face="Times New Roman">/Gladius</FONT>都是这一类的光斑效果),这张图中<FONT face="Times New Roman">HD45</FONT>是<FONT face="Times New Roman">3W</FONT>驱动在<FONT face="Times New Roman">950ma, Aleph1</FONT>是<FONT face="Times New Roman">3W</FONT>驱动在<FONT face="Times New Roman">1000ma</FONT>,可以看出<FONT face="Times New Roman">HD45</FONT>的聚光面积不仅亮而且大,泛光面积虽然小一点但是要比<FONT face="Times New Roman">Aleph1</FONT>亮很多。那么<FONT face="Times New Roman">HD45</FONT>这样的光斑何来实用之说?接着看〖<FONT face="Times New Roman">HD45</FONT>图二和图三〗,图二是<FONT face="Times New Roman">27mm</FONT>反光杯手电的花园照射效果,图中只有聚光部分的物体能够被辨识出来,<FONT color=#d52bb3>周围的泛光在室外似乎变得毫无效果,并且照射产生的高对比度在室外似乎会阻碍人对于事物的整体认识。图三是<FONT face="Times New Roman">HD45</FONT>的照射效果,可以看见其泛光的实用性了,中心物体不仅被又大又亮的聚光照射得清清楚楚,而且手电的泛光部分把周围的环境也都展示了出来,使得人对于前方的物体和环境有了整体概念,不像图二那样的抽象了。有过户外活动经历的朋友应该会喜欢<FONT face="Times New Roman">HD45</FONT>的光斑效果,它在黑夜中不仅能够照亮你想看见的物体,更能帮你很好的辨识周围的环境,</FONT>并且<FONT face="Times New Roman">HD45-5W</FONT>不一般的低档亮度加上<FONT face="Times New Roman">8</FONT>个小时的续航时间是绝对实用的,一个<FONT face="Times New Roman">18650</FONT>基本就能够以近<FONT face="Times New Roman">40</FONT>流明平稳地渡过一个晚上。</P>
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<P><img src="attachments/dvbbs/2006-3/20063289561093153.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2006-3/20063289561093153.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><br><img src="attachments/dvbbs/2006-3/20063289562035426.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2006-3/20063289562035426.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><br><img src="attachments/dvbbs/2006-3/20063289563742303.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2006-3/20063289563742303.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><br><br></P></DIV>
<P>当然开发专用于自行车用的灯就更好了,让它光斑大点。十分期待。<br></P>
[此贴子已经被作者于2006-3-30 17:00:41编辑过]
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