Abstract

The multiechelle grating arrangement (MEGA) [ Appl. Opt. 21, 4363 ( 1982)] is used in a 1.2-m pressure scanned monochromator. The spectral orders from the exit slit of the pressure vessel, containing four 160-mm wide echelle gratings together with a collimating and a focusing mirror, are separated by a prism order-sorter monochromator. Reading the intensities of the spectral orders while varying the pressure gives a read-off of the whole 330–700-nm spectral range (extendable down to 200 nm). A spectral resolution close to 2 × 10⁶ at 632 nm was measured with a He–Ne laser. Operation of the spectrometer is described in detail.

© 1984 Optical Society of America

Tests performed with the improved MEGA spectrometer

Ove Gustafsson and Peter Lindblom
Appl. Opt. 27(1) 147-151 (1988)

Multiechelle grating mountings with high spectral resolution and dispersion

Sonja Engman and Peter Lindblom
Appl. Opt. 21(23) 4363-4367 (1982)

Resolving power of multigrating spectrometers

Peter Lindblom and Folke Stenman
Appl. Opt. 28(13) 2542-2549 (1989)

High-resolution cooled-optics infrared grating spectrometer

Bruce M. Gentry, L. Larrabee Strow, and C. Laurence Korb
Appl. Opt. 23(14) 2401-2407 (1984)

Proposed design class of grazing incidence echelle spectrometers: critical analysis and reevaluation

Michael C. Hettrick, Patrick Jelinsky, Stuart Bowyer, and Roger F. Malina
Appl. Opt. 23(22) 4058-4066 (1984)