請問LED的參數(shù)中viewing angle是什么意思？是它內(nèi)部的反光碗的發(fā)散角嗎？

不是吧

那應(yīng)該怎么取值呀？從產(chǎn)品參數(shù)中找不到呀

有沒有固定的值呀？

光強(qiáng)極值50%到中心之間夾角的2倍，即為viewing angle

4樓說得有理,通常取50%時的角度,而LED規(guī)格書也是注明發(fā)散角的角度也是在50%

附件為常見LED規(guī)格書中關(guān)于視角的示意

倘若LED封裝無透鏡設(shè)計的話，那么輻射體為朗伯體，其全視角（viewing angle）為120度 m6',SY9T  
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加了透鏡的話，就要看規(guī)格書了

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Feature of the device:  high efficient lightsource at low space Q)LM-ZJKQ  
Color coordinates:  x = 0.31, y = 0.32 CIE 1931 (weiß)   dO4
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Color temperature (typ.):  6500 K   lhw()u  
Viewing angle at 50 % IV:  170°   `~ * @q!  
Technology:  ThinGaN     /6h(6 *JI  
Typ. efficiency:  93 lm/W   ]Yvga!S"C  
Grouping parameter:  luminous flux color coordinates SL;9Q[  
soldering methods:  Reflow soldering ~R&;v3  
Preconditioning:  JEDEC Level 4 according to JEDEC S-STD-020-D   qHP78&wUx  
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indoor and outdoor commercial and residential architectural lighting W@Lu;g.Yc  
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