【摘要】 设计并实现了一种平面反射双光程结构的阴影系统,该系统在减小了尺寸的同时还提高了观测的灵敏度;采用直接成像的方法,降低了系统噪声,提高了自动化程度。结果表明:该系统可以清楚地显示小到1.0×10-6g/cm4的密度梯度变化,可在海洋内波动力学研究中,对实验室中模拟内波的形态结构进行观测,满足试验场地受限的情况下大尺寸内波密度场的观测需要。更多还原

【Abstract】 A shadowgraph system with a to-and-fro light-reflecting structure was designed and implemented.The system can reduce overall dimensions and improve visualizing sensitivity.A CCD direct imaging approach was introduced to reduce the system noise and realize full automation.The experimental results show that this system can visualize 1.0×10^-6 g/cm⁵ variations in density gradient,and can be used to visualize experimental simulated internal waves in the study of ocean internal wave dynamics,and can meet the requirement of internal wave visualization with large wave field scale in limited laboratory space.更多还原