for example,

送交者: 008 于 2009-04-08, 12:01:14:

回答: “100毫米外还剩余一定的光强，SAY 50”！一个LED好了。由 JFF 于 2009-04-08, 11:41:15:

http://www.lumex.com/pdf/SSL-LX100133XYC+B.pdf

emitting angle 6 degrees, which means it is a 10mm spot at 100mm distance. If you are using two of these LED, separated more than 10mm, you don't need a light pipe.

所有跟贴:

OK， 6 degrees emitting angle 表面又没DIFFUSED，那连 - JFF (22 bytes) 2009-04-08, 12:35:01 (312571)

加跟贴