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:

1990-11-19

Pagination or Media Count:

11.0

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