[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 aOS,%J^?  
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加了透镜的话，就要看规格书了

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Package:  white SMT package, colorless clear silicone resin clear silicone lens chip level conversion 3u&,3:  
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Feature of the device:  high efficient lightsource at low space kkWv#,qwU  
Color coordinates:  x = 0.31, y = 0.32 CIE 1931 (weiß)   O ;[Mi  
Color temperature (typ.):  6500 K   "qd|!:bE  
Viewing angle at 50 % IV:  170°   |cgjn*a?M  
Technology:  ThinGaN     K&Bbjb_|  
Typ. efficiency:  93 lm/W   ^m&I^\  
Grouping parameter:  luminous flux color coordinates ~LZrhwVj$  
soldering methods:  Reflow soldering MkL2I+*  
Preconditioning:  JEDEC Level 4 according to JEDEC S-STD-020-D   dR;N3KwY  
Taping:  24 mm tape with 200/reel, Ø 180 mm   74MxU  
ESD-withstand voltage:  2 kV acc. to JESD22-A114-D DBL@Mp[<  
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backlighting (illuminated advertising, general lighting) tx~,7TMS/  
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substitution of micro incandescent lamps nq8XVT.m^\  
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