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本文介绍喷射现象的全息照相术。研究喷射现象,就必须掌握喷射器的喷雾锥角、喷雾颗粒的大小及其分布情况。我们应用脉冲激光全息照相术对喷雾器的喷射现象进行了初步研究。以自制的Q开关红宝石激光器为光源,采用离轴全息照相术摄制了由喷射器中喷出的雾滴(高速运动的微小粒子)的全息图。由于采用了离轴型光路,所以在全息图再现时,就可以直接看到雾锥粒子场的立体图象,各粒子在空间的分布情况一目了然。测量其再现象,就可以得到喷雾锥角、粒子的大小及其分布情况。看来这种方法是研究喷射现象的一种较为理想的方法。本文还要谈到这些方法的基本原理,并给出我们初步实验的结果。同时,本文还介绍了同轴全息术在喷射现象研究中的应用,并给出了有关实验结果。
This article describes the phenomenon of jet holography. To study the jet phenomenon, we must know the jet cone angle, the size of spray particles and their distribution. We use pulsed laser holography to spray the phenomenon of a preliminary study. Using a self-made Q-switched ruby laser as a light source, off-axis holography was used to record the holograms of the droplets (high-speed moving fine particles) ejected from the ejector. As a result of the off-axis optical path, so the reproduction of the hologram, you can directly see the pyramid particle field stereo image, the distribution of particles in space at a glance. Measuring its reappearance, you can get the spray cone angle, particle size and distribution. It seems that this method is a better way to study the phenomenon of jetting. This article also addresses the rationale for these methods and gives the results of our preliminary experiments. At the same time, this paper also introduces the application of coaxial holography in the study of jet phenomena, and gives the relevant experimental results.