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Phase Grating for High-Precision Ronchi Testing and Method for Fabricating the Same.
Patent application filed 19 Nov 90,
DEPARTMENT OF THE ARMY WASHINGTON DC
Pagination or Media Count:
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.
APPROVED FOR PUBLIC RELEASE