kg
发表于 2007-3-3 15:54
<div class="quote"><b>以下是引用<i>panic</i>在2007-02-26 14:16:42的发言：</b><br /><p>另外印象中有个光学器件叫做“平行光管”是用来把发散光转化为平行的，楼主可以找找看。</p></div><p>我在网上找找,谢老兄</p>
kg
发表于 2007-3-3 15:54
<div class="quote"><b>以下是引用<i>happy_2000</i>在2007-02-26 15:17:09的发言：</b><br /><p>扫描仪是用交流电，但灯管和内部电路用的是6V或12V的直流电。 </p><p>灯管的亮度：拖鞋到灯管的大概距离20厘米多一点。没有反光罩。</p><img src="attachments/dvbbs/2007-02/1172474223218729.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/2007-02/1172474223218729.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><br /></div><p>有点近啊，成本也高</p>
frank1394
发表于 2007-3-8 21:30
<p></p><p>可以考虑使用液晶屏幕背光管！</p>