|
本帖最后由 tsunn 于 2013-6-18 18:49 编辑 3 ?: }; q1 w8 q
7 n+ ^% S/ `) Q2 w4 c. K
For the evaluation of the optical radiation hazards IEC/EN 62471 shall be applied.- W+ P* H# s; t
Awaiting the future modifications of product standards (lamps, luminaires and others), all the6 i: j: ?& [9 @8 H& x% q, O
requirements, including marking, provided by IEC TR 62471-2 shall be applied.$ n! x- P2 t/ i2 ]6 f" w
- For LEDs with low luminance (< 10^4 cd/m^2) emitting only in the visible range there is no need of# F4 D/ i- K9 B( a/ D; U1 N* M
hazards risk classification according to IEC/EN 62471 (see clause 4.1).0 X7 o" ?; Q5 q8 e
- It’s up to the Certification Body to accept the luminaire manufacturer declaration based on relevant# `/ b' o r* v2 `1 \
tests showing that the radiation from the luminaire does not exceed the values given in IEC/EN& @ u3 v g% ~2 t5 z
62471 for Exempt Group and Risk Group 1. In the TRF, it is indicated that judgement is based on
# Z/ L6 u5 ^# U4 Nmanufacturer’s declaration. If such a declaration is not provided, the measurements given in
0 A0 G1 }. ]2 d: T ]IEC/EN 62471 shall be performed.6 T5 ~8 L4 R. V I( H1 P3 }1 w
谁光学好一点的,帮忙理解一下上面这段话。4 _) D% Q+ J; H5 G: H4 b
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.
' p- t7 n" B% ]( p) L/ c& F8 T7 G/ X' a9 ~, o" n" L# T/ X
|
|