Accession Number : ADD014801

Title :   Phase Grating for High-Precision Ronchi Testing and Method for Fabricating the Same.

Descriptive Note : Patent application filed 19 Nov 90,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Hales, Walter L

Report Date : 19 Nov 1990

Pagination or Media Count : 11

Abstract : A clear phase grating having alternating parallel lands and grooves of unequal widths on its surface produces narrow fringes with well defined edges when used in a traditional Ronchi test arrangement.

Descriptors :   GRATINGS(SPECTRA)

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE