Abstract
In the rainbow schlieren apparatus, a continuously graded rainbow filter is placed in the back focal plane of the decollimating lens. Refractive-index gradients in the test section thus appear as gradations in hue rather than irradiance. A simple system is described wherein a conventional color CCD array and video digitizer are used to quantify accurately the color attributes of the resulting image, and hence the associated ray deflections. The present system provides a sensitivity comparable with that of conventional interferometry, while being simpler to implement and less sensitive to mechanical misalignment.
© 1995 Optical Society of America
Full Article | PDF ArticleMore Like This
Douglas A. Feikema
Appl. Opt. 45(20) 4826-4832 (2006)
Rajani P. Satti, Pankaj S. Kolhe, Semih Olcmen, and Ajay K. Agrawal
Appl. Opt. 46(15) 2954-2962 (2007)
Walton L. Howes
Appl. Opt. 23(14) 2449-2460 (1984)