荧光陶瓷气孔调控对激光照明光性能的影响

The Influence of Fluorescent Ceramic Pore Regulation on the Optical Performance of Laser Illumination

激光照明由蓝色激光激发黄色荧光体获得高亮度白光,具有能量密度高、中心光强高的优点。研究发现,黄色荧光材料对激光折/散射的强弱作用会对荧光陶瓷应用于激光照明产品时光斑中心光强产生显著影响。本文以Y_(3)Al_(5)O_(12):Ce^(3+)(YAG:Ce)荧光陶瓷为研究对象,淀粉为造孔剂,利用高温下淀粉分解出的气体在荧光陶瓷内形成气孔,通过控制原料中淀粉的添加量实现荧光陶瓷中气孔数量和气孔尺寸调控,进而观察淀粉添加比例对激光荧光陶瓷光转换效率、出光光形的影响,同时对比了在透射光路中光斑直径和强度以及反射光路中中心光强的影响。结果表明,当淀粉添加比例升高时荧光陶瓷内气孔数量和气孔尺寸随之升高,透射模式光性能下降,反射模式光性能提升。

Laser lighting products obtain high brightness white light from yellow fluorescent materials excited by blue laser,which has the advantages of high energy density and high central light intensity.It is found that the strong and weak effects of the yellow fluorescent material on the refraction and scattering of the laser will have a significant impact on the light intensity at the center of the spot when the fluorescent ceramics are applied to laser lighting products.This paper takes Y_(3)Al_(5)O_(12):Ce^(3+)(YAG:Ce)fluorescent ceramics as the research object,starch as the pore forming agent,uses the gas decomposed from starch under high temperature to form pores in the fluorescent ceramics,realizes the regulation of the number and size of pores in the fluorescent ceramics by controlling the proportion of starch added in the raw materials,At the same time,the effects of the change of starch addition ratio on the spot diameter,luminous intensity and central light intensity in the transmission and reflection light paths were compared.The results showed that when the starch addition ratio increased,the number and size of pores in the fluorescent ceramics increased,the transmission mode light performance decreased,and the reflection mode light performance improved.