Abstract
A 21-ft original concave diffraction grating, ruled in aluminum and blazed for 5500 Å, has been overcoated with a 1000-Å layer of aluminum followed by a 265-Å layer of magnesium fluoride. The relative grating efficiency has been evaluated in spectral orders 2 through 6 at 1335 Å. It was found that the efficiency was increased 12 times at 1335 Å (4th order) and 20 times at 1215 Å (5th order). The blaze was considerably sharper after coating than before coating. No impairment in resolving power resulted.
© 1962 Optical Society of America
Full Article | PDF ArticleMore Like This
James A. R. Samson
J. Opt. Soc. Am. 52(5) 525-528 (1962)
P. H. Berning, G. Hass, and R. P. Madden
J. Opt. Soc. Am. 50(6) 586-597 (1960)
Frederick B. Orth, Marshall L. Ginter, Kouichi Yoshino, and Charles M. Brown
Appl. Opt. 25(13) 2218-2220 (1986)