首页 -> 登录 -> 注册 -> 回复主题 -> 发表主题
光行天下 -> LightTools -> LED的发散角 [点此返回论坛查看本帖完整版本] [打印本页]

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 1$q SbQ  
Hp8)-eT  
加了透镜的话,就要看规格书了
bluepeter 2009-06-23 12:53
OSRAM OS Golden Dragon Plus Datasheet {&4+W=0 n  
http://catalog.osram-os.com/catalogue/catalogue.do?favOid=0000000200005c3a038f0023&act=showBookmark -SlLX\>p  
Z81]>  
LUW W5AM B7fURL Rqr  
mG1=8{o^  
Golden DRAGON Plus with silicone dome, ultra white, ThinGaN, chip level conversion, reflow solderable, lead (Pb) free – RoHS compliant cIw)ScY  
b_|`jHes  
Features E/Q[J.$o  
Package:  white SMT package, colorless clear silicone resin clear silicone lens chip level conversion vO&%sjvH  
Typical Luminous Flux:  105 lm at 350 mA   $eCxpb..  
Feature of the device:  high efficient lightsource at low space {qp XzxV  
Color coordinates:  x = 0.31, y = 0.32 CIE 1931 (weiß)   /Pxt f~$  
Color temperature (typ.):  6500 K   ,l_"%xYx  
Viewing angle at 50 % IV:  170°   jRm v~]  
Technology:  ThinGaN     pyq~_ Bng  
Typ. efficiency:  93 lm/W   'Wn'BRXq3  
Grouping parameter:  luminous flux color coordinates AcwLs%'sx  
soldering methods:  Reflow soldering -L NJ*?b  
Preconditioning:  JEDEC Level 4 according to JEDEC S-STD-020-D   3T'9_v[Y  
Taping:  24 mm tape with 200/reel, Ø 180 mm   uv%T0JA/  
ESD-withstand voltage:  2 kV acc. to JESD22-A114-D P bj&l0C  
jav7V"$  
==RYf*d  
U,gg@!1GJo  
,gVA^]eDh  
,ZHIXylZ  
Applications r,cV(  
flashlights @a'Rn  
backlighting (illuminated advertising, general lighting) %|*tL7  
reading lamps N<zD<q  
substitution of micro incandescent lamps [d`J2^z}  
indoor and outdoor commercial and residential architectural lighting `WboM\u  
display backlight where high brightness is required e.g. TFT bE74Ui  
decorative and entertainment lighting (incl. fiber optic illumination) ]]Sz|6P  
signal and symbol luminaire }Y[xj{2$O  
marker lights (e.g. steps, exit ways, etc.) W;4rhZEgd  
street lights fZw/kjx@  
tunnel lighting |C301ENZ  
ceiling light   fa//~$#"{L  
查看本帖完整版本: [-- LED的发散角 --] [-- top --]

Copyright © 2005-2025 光行天下 蜀ICP备06003254号-1 网站统计