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 ya|7hz{  
3g} ]nj:N  
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 >0u4>=#  
http://catalog.osram-os.com/catalogue/catalogue.do?favOid=0000000200005c3a038f0023&act=showBookmark :;]6\/ky  
xy[R9_V  
LUW W5AM o,u-%  
{HQ?  
Golden DRAGON Plus with silicone dome, ultra white, ThinGaN, chip level conversion, reflow solderable, lead (Pb) free – RoHS compliant CxwZ$0  
X_"TG;*$  
Features +Pn+&o;D  
Package:  white SMT package, colorless clear silicone resin clear silicone lens chip level conversion jYuH zf  
Typical Luminous Flux:  105 lm at 350 mA   gwT"o  
Feature of the device:  high efficient lightsource at low space V~ZAs+(2Z  
Color coordinates:  x = 0.31, y = 0.32 CIE 1931 (weiß)   p"Fj6T2  
Color temperature (typ.):  6500 K   K~C*4H:9  
Viewing angle at 50 % IV:  170°   l*/I ; a$  
Technology:  ThinGaN     7X1T9'j I2  
Typ. efficiency:  93 lm/W   rHh<_5-/>  
Grouping parameter:  luminous flux color coordinates {bl^O  
soldering methods:  Reflow soldering NCd_h<}|6F  
Preconditioning:  JEDEC Level 4 according to JEDEC S-STD-020-D   >H?8?a D  
Taping:  24 mm tape with 200/reel, Ø 180 mm   tE- s/  
ESD-withstand voltage:  2 kV acc. to JESD22-A114-D %?R}sUo  
mmEr2\L  
vMDV%E S1t  
Oe*emUX7  
kW5g]Q   
"ifYy>d  
Applications  Wu9@Ecb  
flashlights XkOsnI8n  
backlighting (illuminated advertising, general lighting) ;#cb%e3  
reading lamps h0d;a  
substitution of micro incandescent lamps x.~Z9j  
indoor and outdoor commercial and residential architectural lighting -+-@Yq$  
display backlight where high brightness is required e.g. TFT j:\MrYt0H  
decorative and entertainment lighting (incl. fiber optic illumination) 9SXFiZA(r  
signal and symbol luminaire 0vt?yD  
marker lights (e.g. steps, exit ways, etc.) Tf<1Z{9  
street lights 6Jrh'6 o@  
tunnel lighting 9JpPas$]  
ceiling light   ON\_9\kv  
查看本帖完整版本: [-- LED的发散角 --] [-- top --]

Copyright © 2005-2026 光行天下 蜀ICP备06003254号-1 网站统计