雾化场光学全息与数字全息联合测量  

Optical and digital holography for spray measurement

作　　者：徐青[1] 曹娜[1] 曹亮[1] 雷岚[1] 韩长材[1] 

机构地区：[1]西北核技术研究所激光与物质相互作用国家重点实验室,陕西西安710024

出　　处：《应用光学》2013年第6期1005-1009,共5页Journal of Applied Optics

摘　　要：针对雾化场光学全息测量存在干板湿化学处理繁琐、再现像采集耗时的问题,提出光学全息与数字全息联合测量的方法,建立由同轴光学全息、同轴数字全息以及数字延迟信号发生器组成的测量系统,并以双孔直射式喷嘴产生的雾化场为测量对象,利用该测量系统在一次测量中同时获得雾化场的光学全息和数字全息的再现图像,两者具有很好的一致性。光学和数字再现图像相对应的视场范围分别为27.87mm×4.77mm和27.59mm×6.67mm,数字方式获得视场范围内单一层面再现像的时间仅为8s,而光学方式将近1h。结果表明,光学全息与数字全息联合测量时,通过数字全息的雾化再现图像能够对实验总体效果进行实时评估,提高了雾化场全息测量的实验效率。Aiming at the problems that the development oi hotograpmc plate cumbersome and the acquisition of the reconstruction image is time-consuming during the spray measurement with optical holography, a method of simultaneously using optical holography and digital holography was proposed, and a system consisting of in-line optical holography, in-line digital holography and digital delay signal generator was established. Spray field produced by double- hole direct injection nozzle was measured by the system. The reconstructed images of optical holography and digital holography were obtained during a single measurement, and they were in good agreement with each other. The range of the field of view was 27.87 min× 4.77 mm and 27.59 min×6.67 mm, corresponding to optical and digital image reconstruction, and the acquisition time of digital holographic image reconstruction was only 8 s. The results show that a real-time assessment for the experiment effect can be made by the digital holographic image reconstruction, during the ioint measurement of optical holography and digital holography, so the efficiency of holographic measurement experiment for spray field is improved.

关 键 词：信息光学 联合测量 全息 喷雾 

分 类 号：TM26[一般工业技术—材料科学与工程] O348.12[电气工程—电工理论与新技术]