公开(公告)号：US5218426A

公开(公告)日：1993-06-08

申请号：US723950

申请日：1991-07-01

申请人： John L. Hall ,  Peter J. Martin ,  Mark L. Eickhoff ,  Michael P. Winters

发明人： John L. Hall ,  Peter J. Martin ,  Mark L. Eickhoff ,  Michael P. Winters

IPC分类号： G01J9/02 ,  G01N21/41 ,  G01N21/45

CPC分类号： G01N21/45 ,  G01J2009/0257 ,  G01N2021/4106

摘要： A highly accurate in-situ determination of the refractivity of an ambient atmosphere is disclosed, which determination is utilizable to enhance the accuracy of a quantity measurement. The system includes use of a refractometer exposed to an ambient atmosphere and having light directed thereto to form an optical interference fringe pattern having a dependence upon the refractivity of the ambient atmosphere. The fringe pattern is measured as a function of angle either by sequentially scanning a collimated input beam in angle while collecting and detecting the transmitted light, or by imaging (onto a multi-element detector) the angular exit space of the interferometer illuminated with a diverging input beam. The electrical output of the detector is processed to provide an output indicative of the index of refraction of the ambient atmosphere. The determined index of refraction is utilizable to enhance the accuracy of a quantity measurement, such as, for example, the distance measurement provided by a Fabry-Perot or displacement-measuring Michelson interferometer.

摘要翻译： 公开了对环境大气的折射率的高精度原位测定，该确定可用于提高量测量的精度。 该系统包括使用暴露于环境大气中的折射计，并且具有指向其的光以形成具有依赖于环境大气的折射率的光学干涉条纹图案。 通过在收集和检测透射光的同时顺序地扫描准直的输入光束，或者通过成像（在多元件检测器上）成像（以多元件检测器）照射的干涉仪的角出射空间，将条纹图案作为角度测量， 输入光束。 处理检测器的电输出以提供指示环境大气的折射率的输出。 确定的折射率可用于提高量测量的精度，例如由法布里 - 珀罗或位移测量迈克尔逊干涉仪提供的距离测量。