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famen 2009-06-21 10:09

LED的发散角

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?
我是菜鸟 2009-06-21 11:37
不是吧
famen 2009-06-21 12:20
那应该怎么取值呀?从产品参数中找不到呀
famen 2009-06-21 12:21
有没有固定的值呀?
bluepeter 2009-06-22 18:48
光强极值50%到中心之间夹角的2倍,即为viewing angle
bililly 2009-06-22 19:36
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%
bililly 2009-06-22 19:41
附件为常见LED规格书中关于视角的示意
bluepeter 2009-06-23 12:04
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 Hw]E#S  
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加了透镜的话,就要看规格书了
bluepeter 2009-06-23 12:53
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Package:  white SMT package, colorless clear silicone resin clear silicone lens chip level conversion zuvPV{ X  
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Feature of the device:  high efficient lightsource at low space o&?c,FwN  
Color coordinates:  x = 0.31, y = 0.32 CIE 1931 (weiß)   Ga7E}y%  
Color temperature (typ.):  6500 K   o+a=  
Viewing angle at 50 % IV:  170°   0^ODJ7  
Technology:  ThinGaN     :,l7e  
Typ. efficiency:  93 lm/W   GJ,&$@8)  
Grouping parameter:  luminous flux color coordinates .EKlw##  
soldering methods:  Reflow soldering ra$:ibLN  
Preconditioning:  JEDEC Level 4 according to JEDEC S-STD-020-D   ^[?y 2A:  
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reading lamps *()['c#CC  
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indoor and outdoor commercial and residential architectural lighting rnIj pc F  
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decorative and entertainment lighting (incl. fiber optic illumination) a"vzC$Hxd  
signal and symbol luminaire h* S"]ye5  
marker lights (e.g. steps, exit ways, etc.) `n PdZ.  
street lights `OfhzOp  
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