CN108286663A - 一种激光激发荧光照明装置 - Google Patents
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Abstract
为克服目前荧光照明光源中荧光材料连续工作,堆积热量不能及时高效散热的问题,本发明公开一种激光激发荧光照明装置。该装置由激光光源、反光碗、支撑机构、荧光激发装置组成。其中,荧光激发装置由荧光转盘、热沉和散热翅片组成。本发明采用间隙激发模式,使荧光材料处于间歇工作状态,可避免连续工作导致热量集中和提升热交换效率。荧光转盘及热沉采用具备良好导热性的紫铜材料制作,可将激发端产生热量迅速传递至后端散热结构。后端散热结构为翅片结构,可增大散热面积。装置内部各连接处涂抹导热硅脂,避免因装配空隙导致导热不良。本发明可有效提升荧光照明装置散热效率和荧光材料使用寿命。
Description
技术领域
本发明属于光源设计技术领域,特指一种激光激发荧光照明装置。
背景技术
目前,采用蓝光或激光诱导荧光材料发光、激发光再与蓝光混合以产生白光的激光激发荧光照明光源,因具有较高能量转换效率、节能环保、冷光源等特性,在诸多领域(特别是某些特殊安全行业),得以广泛使用。
但是,这种光源的缺陷在于其发光功率被限制在一个较低的水平,主要受荧光材料自身属性和光源激发模式的影响:(1)在光源诱导发光过程中,受各种因素影响会产生大量热量,而荧光材料为有机物,在高热情况下会挥发,发光效率将随之衰减,当热量过于集中时,甚至还会造成荧光材料的烧毁。(2)当前该类光源常用的激发方式为蓝光或激光直接激发荧光材料,在激发结构后端添加散热结构如翅片或风冷机构进行冷却。在这种方式下,光源的稳定性十分依赖散热结构,而且荧光材料一直处于连续工作状态,热量很容易堆积,导致荧光材料无法承受较高功率的激发光而且不具备短时间过载的能力。
发明内容
为克服现有激光激发荧光照明光源中荧光材料连续工作、堆积热量不能及时高效散热的问题,本发明提供一种激光激发荧光照明装置,旨在有效提升荧光激发装置散热效率和荧光材料使用寿命。
本发明公开一种激光激发荧光照明装置,其特征是:该装置包括激光光源(1)、反光碗(2)、支撑机构(3)、荧光激发装置(4),其中,支撑结构(3)用于固定激光光源(1)、反光碗(2)、荧光激发装置(3),激光光源(1)位于反光碗(2)底部,向荧光激发装置(3)投射激光光束(5),荧光激发装置(4)位于反光碗(2)焦点处,接受激光光源(1)投射的激光光束(5)后向外辐射荧光(6),荧光(6)到达反光碗(2)底部、经反光碗(2)汇聚后向外照明。
所述荧光激发装置(4)由荧光转盘(7)、热沉(8)、散热翅片(9)组成,其中,荧光转盘(7)套装在热沉(8)内部、并可转动;在荧光转盘(7)正对激光光源(1)一侧涂装荧光材料,荧光材料在激光光束(5)照射下向外辐射荧光并发热;荧光转盘(7)产生的热量传导给热沉(8),热沉(8)后端连接散热翅片(9),散热翅片(9)将热沉(8)传导过来的热量散发到空气中;热沉(8)外部制作螺纹(10)用于将荧光激发装置(4)固定到支撑机构(3)上。
所述荧光转盘(7)是圆柱形结构,在荧光转盘(7)背对激光光源(1)一侧通过连接杆(11)与减速齿轮系(12)连接,减速齿轮系(12)与电机(13)连接,电机(13)为低功耗电机、通过减速齿轮系(12)带动荧光转盘(7)转动;减速齿轮系(12)通过减速齿轮系固定支座(14)固定在热沉(8)上;电机(13)通过电机固定支座(15)固定在热沉(8)上。
所述荧光转盘(7)、热沉(8)采用紫铜材料制作,用于提升导热效率。
所述减速齿轮系(12)用于降低电机(13)转速,选用n个齿轮组合实现,n的取值范围为1~10。
所述连接杆(12)采用聚四氟乙烯隔热材料制作,用于隔断荧光转盘热量向电机(13)传递。
所述荧光转盘(7)直径大于激光光束(5)直径,荧光转盘(7)旋转中心与激光光束(5)中心偏心,使激光光束(5)只照射荧光转盘(7)外环中局部区域、不照射整个荧光转盘;在激光照射区域(16)内的荧光材料接受激光光束能量向外辐射荧光(6),并发热;非激光照射区域(17)内荧光材料不辐射荧光、不发热;当电机(13)带动荧光转盘(7)转动时,激光照射区域(17)在荧光转盘外环上转动形成一个发光环带(18);在转动过程中,发光环带(18)内荧光材料处于间隙激发、持续发光工作状态。
所述散热翅片(9)采用铝合金材料制作,并设计成翅片状,用于增大与空气接触面积、加快热量散发。
所述散热翅片(9)内部各连接处均涂抹导热硅脂,用于当存在装配间隙时有效传递热量。
与现有技术相比,本发明的有益效果是:1)本发明中激发光源的激光束与荧光转盘偏心设置,当荧光转盘转动时,激光光束照射区域形成发光环带,在发光环带内部的荧光材料处于间隙激发、持续发光工作状态,可有效避免荧光材料连续工作热量集中的问题,并且有效提升热交换效率;与此同时,在间隙工作状态下,荧光材料的温度上升不是线性上升状态,可有效保护荧光材料并提高其实用寿命;并且,短时间的功率过载也不会致使荧光材料的温度直线上升,而是存在一定的缓冲期,使荧光材料具备一定的抗过载能力,稳定性更佳;2)荧光转盘及热沉均采用具备良好导热性的紫铜材料制作,可将激发端产生热量迅速传递至后端散热结构;3)后端散热结构为翅片结构,可增大散热面积,迅速将热量散发出去;4)解决散热问题后,荧光材料所能承受的激发光功率也随之提高,即可获得更高功率的激发光;5)装置内部各连接处涂抹导热硅脂,避免因装配空隙导致导热不良。综上,与现有技术相比,本发明可有效提升照明装置中荧光激发装置散热效率和荧光材料使用寿命。
附图说明
图1本发明照明装置示意图
图2本发明荧光激发装置结构示意图
图3本发明荧光激发装置实例图
图4本发明荧光转盘照射区域示意图
图5本发明荧光转盘照射区域时间变化示意图
图中,1-激光光源,2-反光碗,3-支撑机构,4-荧光激发装置,5-激光光束,6-荧光,7-荧光转盘,8-热沉,9-散热翅片,10-螺纹,11-连接杆,12-减速齿轮系,13-电机,14-减速齿轮系固定支座,15-电机固定支座,16-激光照射区域,17-非激光照射区域,18-发光环带。
具体实施方式
下面结合附图和实施例对发明内容进行说明。
图1为本发明照明装置示意图,它由激光光源(1)、反光碗(2)、支撑机构(3)、荧光激发装置(4)组成,其中,支撑结构(3)用于固定激光光源(1)、反光碗(2)、荧光激发装置(3);激光光源(1)位于反光碗(2)底部,向荧光激发装置(3)投射激光光束(5);荧光激发装置(4)位于反光碗(2)焦点处,接受激光光源(1)投射的激光光束(5)后向外辐射荧光(6);荧光(6)为图1中带箭头的虚线;辐射的荧光(6)到达反光碗(2)底部、经反光碗(2)汇聚后向外照明。
图2为本发明荧光激发装置结构示意图,它由荧光转盘(7)、热沉(8)、散热翅片(9)组成,图3为本发明荧光激发装置实例图,在图2中,热沉(8)、散热翅片(9)为纵向剖面图,分别为左斜、右斜条纹图案。其中,荧光转盘(7)套装在热沉(8)内部、并可转动,在荧光转盘(7)正对激光光源(1)一侧涂装荧光材料,荧光材料在激光光束(5)照射下向外辐射荧光(6),并发热,荧光转盘(7)中的热量传导给热沉(8),热沉(8)后端连接散热翅片(9),将热沉(8)传导过来的热量散发到空气中,热沉(8)外部制作螺纹(10)用于将荧光激发装置(4)固定到支撑机构(3)上。
荧光转盘(7)为圆柱形结构,在荧光转盘(7)背对激光光源(1)一侧通过连接杆(11)与减速齿轮系(12)连接,减速齿轮系(12)与电机(13)连接,电机(13)为低功耗电机,通过减速齿轮系带动荧光转盘转动;减速齿轮系(12)通过减速齿轮系固定支座(14)固定在热沉(8)上;电机(13)通过电机固定支座(15)固定在热沉(8)上。
荧光转盘(7)、热沉(8)采用紫铜材料制作,用于提升导热效率。
减速齿轮系(12)用于降低电机(13)转速,选用3个齿轮组合实现。
连接杆(12)采用聚四氟乙烯隔热材料制作,用于隔断荧光转盘(7)热量向电机(13)传递。
荧光转盘(7)直径为10mm,激光光束(5)直径为3mm,荧光转盘(7)旋转中心与激光光束(5)中心偏心,使激光光束(5)只照射荧光转盘(7)外环中局部区域、不照射整个荧光转盘。
散热翅片(9)采用铝合金材料制作,并设计成翅片状,用于增大与空气接触面积、加快热量散发。
散热翅片(9)内部各连接处均涂抹导热硅脂,用于当存在装配间隙时有效传递热量。
如图4所示,在激光照射区域(16)内的荧光材料接受激光光束能量向外辐射荧光(6),并发热;非激光照射区域(17)内荧光材料不辐射荧光、不发热;当电机(13)带动荧光转盘(7)转动时,激光照射区域(17)在荧光转盘外环上转动形成一个发光环带(18),在转动过程中,发光环带(18)内荧光材料处于间隙激发、持续发光工作状态。在图4中,激光照射区域(16)为圆形右斜条纹图案,发光环带(18)为网状图案,非激光照射区域(17)为左斜条纹图案。
如图5所示,当荧光转盘顺时针转动时,在发光环带(18)上,16-1是t1时刻激光照射区域,16-2是t2时刻激光照射区域;在t1时刻,激光照射区域(16-1)内荧光材料受激光激发辐射荧光、并发热,在t2时刻时,激光照射区域(16-1)不再受激光照射,处于非激发状态,不发光、不发热,通过这种交替激发方式,可避免荧光材料持续受激激发,降低发热量,提升荧光材料使用寿命。
Claims (1)
1.一种激光激发荧光照明装置,其特征是:该装置包括激光光源(1)、反光碗(2)、支撑机构(3)、荧光激发装置(4),其中,支撑结构(3)用于固定激光光源(1)、反光碗(2)、荧光激发装置(3),激光光源(1)位于反光碗(2)底部,向荧光激发装置(3)投射激光光束(5),荧光激发装置(4)位于反光碗(2)焦点处,接受激光光源(1)投射的激光光束(5)后向外辐射荧光(6),荧光(6)到达反光碗(2)底部、经反光碗(2)汇聚后向外照明;
所述荧光激发装置(4)由荧光转盘(7)、热沉(8)、散热翅片(9)组成,其中荧光转盘(7)套装在热沉(8)内部、并可转动,在荧光转盘(7)正对激光光源(1)一侧涂装荧光材料,荧光材料在激光光束(5)照射下向外辐射荧光并发热,荧光转盘(7)中的热量传导给热沉(8),热沉(8)后端连接散热翅片(9),散热翅片(9)将热沉(8)传导过来的热量散发到空气中,热沉(8)外部制作螺纹(10)用于将荧光激发装置(4)固定到支撑机构(3)上;
所述荧光转盘(7)是圆柱形结构,在荧光转盘(7)背对激光光源(1)一侧通过连接杆(11)与减速齿轮系(12)连接,减速齿轮系(12)与电机(13)连接,电机(13)为低功耗电机、通过减速齿轮系(12)带动荧光转盘(7)转动;减速齿轮系(12)通过减速齿轮系固定支座(14)固定在热沉(8)上;电机(13)通过电机固定支座(15)固定在热沉(8)上;
所述荧光转盘(7)、热沉(8)采用紫铜材料制作,用于提升热量传导效果;
所述减速齿轮系(12)用于降低电机(13)转速,由n个齿轮组成,n的取值范围为1~10;
所述连接杆(12)采用聚四氟乙烯制作,用于隔断荧光转盘热量向电机(13)传递;
所述荧光转盘(7)直径大于激光光束(5)直径,荧光转盘(7)旋转中心与激光光束(5)中心偏心,使激光光束(5)只照射荧光转盘(7)外环中局部区域、不照射整个荧光转盘;在激光照射区域(16)内的荧光材料接受激光光束能量向外辐射荧光(6),并发热;非激光照射区域(17)内荧光材料不辐射荧光、不发热;当电机(13)带动荧光转盘(7)转动时,激光照射区域(17)在荧光转盘外环上转动形成一个发光环带(18);在转动过程中,发光环带(18)内荧光材料处于间隙激发、持续发光工作状态;
所述散热翅片(9)采用铝合金材料制作,并设计成翅片状,用于增大与空气接触面积、加快热量散发;
所述散热翅片(9)内部各连接处均涂抹导热硅脂,用于当存在装配间隙时有效传递热量。
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