Double monochromator

Details Double monochromator Double monochromator

1978-07-06

1983-02-01

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With monochromator structure

G01J 318

Patent

active

043712630

ABSTRACT:
A double monochromator having a principal stage and a pre-monochromator or first stage that includes a coarse reflecting plane diffraction grating and a concave mirror for converging the object beam on the grating and for imaging the selected band of diffracted light from the grating on the entrance slit of the principal or second stage. The first stage spectral bandwidth is much larger than the second stage, thus permitting use of a grating having a groove spacing approximately ten times that of the second stage grating, and the use of linear wavelength adjusting means. The imaging mirror results in a shorter image and object distance and therefore a smaller convenient instrument.

REFERENCES:
patent: 3418051 (1968-12-01), Staunton
patent: 3431054 (1969-03-01), Doonan et al.
patent: 3749498 (1973-07-01), Shimomura
patent: 3817633 (1974-06-01), White
patent: 3865490 (1975-02-01), Grossman
Kriman, "Double Monochromator with Two Diffraction Gratings", Optics and Spectroscopy, vol. 31, No. 6, Dec. 1971, p. 562.
James et al., The Design of Optical Spectrometers, 1969, Chapman and Hall, Ltd., pp. 58, 59 and 72.

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