|
本帖最后由 tsunn 于 2013-6-18 18:49 编辑
& l% G2 t$ {, }( O$ X4 a
" K, p( t; d7 d7 e$ z' a4 UFor the evaluation of the optical radiation hazards IEC/EN 62471 shall be applied.
: `) g6 |! B) Q- r% i+ iAwaiting the future modifications of product standards (lamps, luminaires and others), all the: S( l% U- I* T ^# f+ ~7 D
requirements, including marking, provided by IEC TR 62471-2 shall be applied.& f' t! S# w0 Y4 V- I: W& z. Q9 X
- For LEDs with low luminance (< 10^4 cd/m^2) emitting only in the visible range there is no need of6 w8 h- F8 F7 Z$ J9 p
hazards risk classification according to IEC/EN 62471 (see clause 4.1).
w" G: w! X0 o/ Q6 Q0 u; M. \- It’s up to the Certification Body to accept the luminaire manufacturer declaration based on relevant
! g9 T% k4 G, Utests showing that the radiation from the luminaire does not exceed the values given in IEC/EN
, `% J( \; B- Y" u4 E62471 for Exempt Group and Risk Group 1. In the TRF, it is indicated that judgement is based on- ]9 y) J8 E9 L2 T: S
manufacturer’s declaration. If such a declaration is not provided, the measurements given in
, H* d, t! X" r! i' Y& WIEC/EN 62471 shall be performed.
5 }8 G5 v3 Z& ?1 Q O# z谁光学好一点的,帮忙理解一下上面这段话。
/ X* D n) a! d$ g7 G- i/ h' O) U6 G亮度低于10^4cd/m^2不需要根据62471危险分类。这个亮度怎么去理解,距离光源远近不同,亮度肯定不同,它只是笼统的说亮度低于10^4cd/m^2,没有任何前提条件,到底是距离光源1米范围内,还是距离光源0.5米范围内,还是其他范围内,没作任何说明。对了,灯具有个照射距离标,会不会一般按照0.5m来定呢?照射距离标也有标0.1的,或许根据不同的标法有不同的规定,比如标0.3m,那么此条CTL决议就理解为0.3m处亮度小于10^4cd/m^2不用考虑62471.8 D4 C# Y' ^+ g0 l* \: C# I
1 t, n8 [/ J. @8 L) n! a |
|