多光束剪切干涉法测量焦距

Focal-length measurement by multiple-beam shearing interferometry.

作者信息

Matsuda K, Barnes T H, Oreb B F, Sheppard C J

机构信息

Department of Physical Optics, School of Physics, University of Sydney, New South Wales 2006, Australia.

出版信息

Appl Opt. 1999 Jun 1;38(16):3542-8. doi: 10.1364/ao.38.003542.

DOI:10.1364/ao.38.003542

PMID:18319955

Abstract

The application of multiple-beam shearing interferometry to lens focal-length measurement is described. A coated shearing plate interferometer was used in transmission to produce sharp multiple-beam fringes that rotate as the collimation of the incoming wave front from the lens under test changes. The test lens was used to collimate light from a point source that was translated longitudinally, and the focal length was determined from the rate of rotation of the fringes as the source moved. This method is simple, accurate, and lends itself to automatic determination of focal length.

摘要

描述了多光束剪切干涉测量法在透镜焦距测量中的应用。使用了一个镀膜剪切平板干涉仪进行透射测量，以产生清晰的多光束条纹，当来自被测透镜的入射波前准直情况发生变化时，这些条纹会旋转。被测透镜用于准直来自纵向平移的点光源的光，并且根据条纹在光源移动时的旋转速率来确定焦距。这种方法简单、准确，且便于自动测定焦距。