Engineering Research Equipment Grant: Excimer Pumped Dye Laser for Tomographic 3-D Imager

这是一项研究设备补助金用于准分子泵浦染料 能够进行时间分辨的激光断层扫描三维成像系统 以每秒1000帧的速度拍摄流体流动的三维图像。 这 设备将继续开发成像系统， 用全息照相法研究同向流动的气体射流 干涉测量法 图像信息记录在照相胶片上， 表示光程长度，其与 介质的折射。 所述断层成像仪耦合到 准分子泵浦染料激光器开辟了令人兴奋的新应用。 通过调谐 UV辐射到感兴趣的物种的共振线，仅 这些气体将被测量。 因此，应该能够有选择地 测量燃烧流中的O2或OH等物质。 此外，本发明还提供了一种方法， 通过沿光的路径长度沿着测量吸收， 通过使用探测光束，可以避免繁琐的条纹读出过程。 这种设备在流体力学中应该是非常有用的， 燃烧研究

This is a Research Equipment Grant for an excimer pumped dye laser tomographic 3-D imaging system capable of making time-resolved 3-D images of a fluid flow at a rate of 1000 frames per second. This equipment will continue the development of an imaging system for the examination of a coflowing gaseous jet using holographic interferometry. Image information is recorded on photographic film, representing the optical pathlength, which is related to the index of refraction of the medium. The tomographic imager coupled to an excimer pumped dye laser opens exciting new applications. By tuning the UV radiation to a resonance line of a species of interest, only that gas will be measured. Thus it should be possible to selectively measure such species as O2 or OH in a combusting flow. In addition, by making a measurement of absorption along the path length of the probe beams, the cumbersome process of fringe readout can be avoided. This equipment should prove very useful in fluid mechanics and combustion research.