Abstract

Double mirrors are used in the focused spectrum of diffraction gratings to invert the spectrum and return the radiation to the grating a number of times. After three or four diffractions from low orders, resolution is observed which is equivalent to that available in the highest orders. An additional double-mirror system is described which separates the spectra, obtained after several diffractions, from other spectra. The problem of multiple diffraction with long-curved slits is discussed, and a modification of the Ebert monochromator is suggested for high-resolution multiple-diffraction spectrometry.

© 1954 Optical Society of America

Performance of Merton-N.P.L. Gratings in a Commercial Infrared Spectrometer

A. R. H. Cole
J. Opt. Soc. Am. 44(9) 741-743 (1954)

Theory of the Multiple Diffraction Grating

Norman Hilberry
J. Opt. Soc. Am. 26(1) 1-11 (1936)

Successive Diffractions by a Concave Grating

F. A. Jenkins and L. W. Alvarez
J. Opt. Soc. Am. 42(10) 699-705 (1952)

The Reduction of Ghosts in Diffraction Grating Spectra

N. A. Finkelstein, C. H. Brumley, and R. J. Meltzer
J. Opt. Soc. Am. 42(2) 121-126 (1952)

The Luminosity of Spectrometers with Prisms, Gratings, or Fabry-Perot Etalons

Pierre Jacquinot
J. Opt. Soc. Am. 44(10) 761-765 (1954)