Virginia TechIndebetouw, Guy J.2014-04-042014-04-041980-08G. Indebetouw, "Tunable spatial filtering with a Fabry-Perot etalon," Appl. Opt. 19, 761-764 (1980). doi: 10.1364/ao.19.0007610003-6935http://hdl.handle.net/10919/46971A Fabry-Perot etalon is used in the image plane as a means of selecting arbitrary directions of propagation in the angular spectrum of an object. This provides a simple widely tunable spatial filter that could be useful in a number of image processing and pattern recognition applications.application/pdfenIn CopyrightArticle - Refereedhttp://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-19-5-761https://doi.org/10.1364/ao.19.000761