环形LED墙灯

simem

<P>光源为Low-profile LED, 灯体材料为塑胶, 形状为抛物线回转体, 灯体利用全反射.</P>
<P><img src="data/attachment/forum/dvbbs/2004-10/200410151110655.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(\'data/attachment/forum/dvbbs/2004-10/200410151110655.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="data/attachment/forum/dvbbs/2004-10/2004101511111294.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(\'data/attachment/forum/dvbbs/2004-10/2004101511111294.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /></P>
<P>
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simem

<P align=center><img src="data/attachment/forum/dvbbs/2004-10/20041015122553910.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(\'data/attachment/forum/dvbbs/2004-10/20041015122553910.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="data/attachment/forum/dvbbs/2004-10/20041015122650216.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(\'data/attachment/forum/dvbbs/2004-10/20041015122650216.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /></P>
<P align=center>两米处的光照度分布
<img src="data/attachment/forum/dvbbs/2004-10/2004101512271901.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(\'data/attachment/forum/dvbbs/2004-10/2004101512271901.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="data/attachment/forum/dvbbs/2004-10/20041015122712409.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(\'data/attachment/forum/dvbbs/2004-10/20041015122712409.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /></P>
<P align=center>远场角度分布
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[此贴子已经被作者于2004-10-15 12:33:08编辑过]

simem

<P>设计目标为远场角度分布为20度, 设计符合基本要求,有点遗憾的是两米处的光强分布不是平顶高斯分布, 顶部暗了点.</P>

Jobyan

<P>不明白平頂高斯分布？</P>

simem

一般像范光灯或者是聚光灯之类的，最好的光强分布顶部是平的，一个角度以外光强慢慢衰减，叫做平顶高斯分布。当然高斯分布的也可以。

愚人

相当不错啊，不知道你的LED模型是否准确。自己建立的还是有源文件。

有没有考虑调整LED或反射碗的放置角度？这样也许对于暗区问题或许有帮助。

simem

LED模型是按照客户指定的LED指标建的, 发散半角为55度左右, 分布应该是准确的.调整LED或反射碗的放置角度倒是没有考虑, 会再试试, 谢谢楼上的建议.

LED的建模

远场的角度