hx0999 发表于 2004-9-30 16:57:00

请教光照度与光亮度的概念?

<P>还有,他们的单位是什么?</P>

func 发表于 2004-9-30 18:10:00

<P>illuminance 照度 lm/m^2 or lux (流明/平方米 或者 勒克司)</P><P>luminance亮度 cd/m^2 or nit (坎得拉/平方米 或者 尼特)</P><P>看看单位单位就知道概念了。</P>

zhulc2001 发表于 2004-10-2 07:18:00

<P>照度是相对于被照物而言,亮度是相对于发光体(光源)而言</P>

njit 发表于 2004-10-6 18:07:00

<P>不会吧?</P><P>有的东西(概念)在书上有,不致于这么不用功吧?</P>

hx0999 发表于 2005-2-1 23:02:00

谢谢回答,明白了!!!

xiaziii 发表于 2005-2-6 01:54:00

这是图

<P>照度:</P>
<P><img src="data/attachment/forum/dvbbs/2005-2/200525175425479.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/2005-2/200525175425479.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /></P>
<P>亮度:</P>
<P>
</P><img src="data/attachment/forum/dvbbs/2005-2/20052517543923.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/2005-2/20052517543923.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

wind_1130 发表于 2005-2-13 23:02:00

<P>哈,不同的概念,还是好好看书比较实在。</P>
[此贴子已经被作者于2005-2-16 12:40:19编辑过]

huhusars 发表于 2005-2-20 21:15:00

<P>照度就是单位时间,单位面积上通过的光能量!</P>

hx0999 发表于 2005-2-23 02:25:00

6楼的图很直观呵,谢谢
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