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本帖最后由 tsunn 于 2013-6-18 18:49 编辑
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For the evaluation of the optical radiation hazards IEC/EN 62471 shall be applied.' |* R: ~7 P+ D
Awaiting the future modifications of product standards (lamps, luminaires and others), all the
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0 F: E- U/ y6 D& s- For LEDs with low luminance (< 10^4 cd/m^2) emitting only in the visible range there is no need of! O, U9 C$ x7 y3 S
hazards risk classification according to IEC/EN 62471 (see clause 4.1).
6 @8 _7 ^" z' w2 i- It’s up to the Certification Body to accept the luminaire manufacturer declaration based on relevant
/ ^% c5 n' K/ z* Utests showing that the radiation from the luminaire does not exceed the values given in IEC/EN
6 A6 s$ A1 H- @5 r* n) R4 `62471 for Exempt Group and Risk Group 1. In the TRF, it is indicated that judgement is based on! S' f# B* _; t( _- A0 S! t
manufacturer’s declaration. If such a declaration is not provided, the measurements given in
- |# G6 L2 @; U) D1 t# m7 }IEC/EN 62471 shall be performed.' ~. q D/ \; g4 _
谁光学好一点的,帮忙理解一下上面这段话。3 }, w% L4 e- A! z* h8 ?( W o+ Q
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.
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