Monochromator

Details Monochromator Monochromator

1980-02-27

1982-01-12

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With monochromator structure

G01J 318

Patent

active

043102441

ABSTRACT:
An Ebert monochromator for a spectrophotometer in which the diffraction grating is positioned off of the central optical axis of the collimator mirror by interpositioning a plane mirror between the collimator mirror and the diffraction grating. The plane mirror may be movable to select one of several diffraction gratings. By arranging the diffraction grating about an axis parallel with the central optical axis, a simple mechanical wavelength drive system with a common cam shaft driving the grating, a filter holder, and a rotatable slit plate can be provided. Further gratings may be driven from the cam shaft as may also the movable plane mirror which selects them.

REFERENCES:
patent: 2757568 (1956-08-01), Fastie
patent: 3069966 (1962-12-01), White
Finkelstein, Journal of the Optical Society of America, vol. 41, No. 3, Mar. 1951, pp. 179-182.
Fastie, Journal of the Optical Society of America, vol. 42, No. 9, Sep. 1952, pp. 647-651.

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