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引用第6楼依然于2011-09-23 14:16发表的 :+ z9 y0 p& X$ x9 \$ }9 l
按照UL8750条款,lens可以使用玻璃的。
4 [( t, J8 \# @6.3.4 The lens (optic) of an LED package connected in a circuit that represents a risk of electric shock need not be provided within an enclosure if made of:
4 H S' W; n9 U. o! l/ [5 da) Glass, or
" c% y1 o( X Y Pb) A polymeric material that complies with the dielectric voltage withstand test of 8.4 when a" R7 \/ ~7 C: u; n3 V
500-V potential is applied between the electrical connections to the LED and the lens surface.* T+ h6 y) y; ^& u& I# O/ l
....... 正解...所以跌落测试是必须的.要不就做CLASS2,要不就用强化玻璃... |
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