摘要
根据太阳光谱在波长750nm处的光能相对比较稳定,能避免杂光干扰这一特点,研制一种太阳跟踪器干涉滤光片。采用红外石英玻璃作为基底,选择Ti2O3和SiO2作为高低折射率材料,利用台伦对称膜系等效层的概念,设计三半波干涉滤光片。通过真空镀膜和离子辅助沉积系统,研制了在波段400nm-720nm、780nm-1000nm平均透过率低于0.1%,750nm的透过率高于91%,带宽为40nm的太阳跟踪器干涉滤光片。在制备过程中,解决了Ti2O3吸收问题;通过实验,分析了波长漂移产生的原因并提出可行办法。
Sunlight at 750nm wavelength has the characteristic that the light energy is stable and is easy to avoid stray light.According to the characteristic,an interference filter in solar-tracker has been developed.IR quartz glass is selected as the substrate.Ti2O3and SiO2are chosen as high and low refractive index film materials.The theory of Thelen symmetric equivalent film system is used to design a three half-wave interference filter.By using vacuum depositing method with ion-assisted deposition system,the filter with average transmittance less than 0.1%in 400nm～720nm、780nm～1000nm and over 91%in 750nm is achieved.In the process of evaporating,an improved monitoring method is used to reduce the absorption of Ti2O3.Based on repeated experiments,the reason of wavelength shift is analyzed and the feasible method for solving the problem is put forward.
出处
《工程与试验》
2011年第4期80-83,共4页
Engineering and Test
关键词
太阳跟踪器
干涉滤光片
离子辅助沉积
solar-tracker
interference filter
ion-assisted deposition
