[求助]LED的发散角 [复制链接]

请问LED的参数中viewing angle是什么意思？是它内部的反光碗的发散角吗？

不是吧

那应该怎么取值呀？从产品参数中找不到呀

有没有固定的值呀？

光强极值50%到中心之间夹角的2倍，即为viewing angle

4楼说得有理,通常取50%时的角度,而LED规格书也是注明发散角的角度也是在50%

附件为常见LED规格书中关于视角的示意

倘若LED封装无透镜设计的话，那么辐射体为朗伯体，其全视角（viewing angle）为120度 xbw;s}B  
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加了透镜的话，就要看规格书了

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Golden DRAGON Plus with silicone dome, ultra white, ThinGaN, chip level conversion, reflow solderable, lead (Pb) free – RoHS compliant wE<r'  
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Features iT|7**+3  
Package:  white SMT package, colorless clear silicone resin clear silicone lens chip level conversion icIWv  
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Feature of the device:  high efficient lightsource at low space e, 2/3jO  
Color coordinates:  x = 0.31, y = 0.32 CIE 1931 (weiß)   ^^!G{*F  
Color temperature (typ.):  6500 K   KrG,T5  
Viewing angle at 50 % IV:  170°   +!ljq~%  
Technology:  ThinGaN     b|E ZD3y  
Typ. efficiency:  93 lm/W   SvkCx>6/G  
Grouping parameter:  luminous flux color coordinates C,mfA%63  
soldering methods:  Reflow soldering T+RC#&>  
Preconditioning:  JEDEC Level 4 according to JEDEC S-STD-020-D   *]R5bj.!o  
Taping:  24 mm tape with 200/reel, Ø 180 mm   Fkpaou  
ESD-withstand voltage:  2 kV acc. to JESD22-A114-D H0])>1sWB  
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backlighting (illuminated advertising, general lighting) GNrRc3dr$  
reading lamps v{"yrC  
substitution of micro incandescent lamps q=`n3+N_H~  
indoor and outdoor commercial and residential architectural lighting 2T?Y  
display backlight where high brightness is required e.g. TFT Val"vUZ  
decorative and entertainment lighting (incl. fiber optic illumination) bd%< Jg+  
signal and symbol luminaire YIgHLM(  
marker lights (e.g. steps, exit ways, etc.) 5#X R1#`  
street lights 2cIbX  
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