VACUUM ULTRAVIOLET GRATINGS.
JOHNS HOPKINS UNIV BALTIMORE MD LAB OF ASTROPHYSICS AND PHYSICAL METEOROLOGY
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The efforts to produce efficient diffraction gratings for the vacuum ultraviolet are reviewed, and data on 40 gratings ruled for the sponsor are given. The efforts have included studies of diamond wear and experiences on ruling bare glass aluminum, platinum, and gold films deposited on glass and on both bare and coated glass rulings subsequently etched. Some of the ruling results have been photographed with an electron microscope. Author