Abstract：Based on the basic principle of Schlieren apparatus, the causes of poor Schlieren instrument image quality are analyzed, and the light source parts with focusing lens solutions is proposed. In-depth analysis and calculating the size of the adding together after focusing lens flare, at the same time, for convenient adjusting, a coaxial clamp design frame is designed. Through the experiment of the entire system, after the focusing lens and two kinds of temperature at 60℃ and 90℃ in heating platform, the imaging quality is obvious improved, air turbulence is observed more apparently.
［1］吕小亮.背景纹影技术的温度场测量［D］. 杭州:浙江大学, 2011.
［2］Campbell M K, Daly C, Wallace S A, et al. Temperature measurement of air convection using a Schlieren system［J］. Optics and Laser Technology, 2008, 41(3):233-240.
［3］Kumar R, Kaura S K, Chhachhia D P, et al. Comparative study of different Schlieren diffracting elements［J］. Pramana, 2008, 70(1):121-129.
［4］苏小华, 张加深. 几种常见光源特性的研究［J］. 大学物理实验, 2003, 16(3):52-54.
［5］糜长稳, 王克逸, 李明, 等. 基于光探针技术的自聚焦透镜光斑测量方法［J］. 光子学报, 2004, 33(2):244-247.
［6］郎贤礼, 刘德森, 朱少丽, 等. 自聚焦透镜的傅里叶变换性质及成像性质［J］. 光子学报, 2005, 34(7):988-992.
［7］杨占宇, 单鹏, 张晶辉. 彩色纹影仪设计新方法［J］. 中国科技论文, 2012, 7(11):827-829.
［8］冯天植, 刘成民, 赵润祥, 等. 纹影技术述评［J］. 弹道学报, 1994,2(2):89-96.
［9］Martínez-González A, Moreno-Hernández D, Guerrero-Viramontes J A. Measurement of temperature and velocity fields in a convective fluid flow in air using schlieren images［J］. Applied Optics,2013, 52(22):5562-5569.
2018, Vol. 39 
