Difference dispersive double-path monochromator having wavelengt

Details Difference dispersive double-path monochromator having wavelengt Difference dispersive double-path monochromator having wavelengt

1994-12-22

1996-07-02

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

With monochromator structure

356328, G01J 318

Patent

active

055328180

ABSTRACT:
Incoming light is reflected by a first parabolic mirror for incidence as parallel rays of light on a diffraction grating, the reflected light therefrom is incident on a second parabolic mirror, and the reflected light therefrom is bent by first and second reflecting mirror in a vertical direction and reflected back to the second parabolic mirror, from which it is reflected to the diffraction grating. The reflected light from the grating is reflected again by the first parabolic mirror for incidence on a photodetector. An optical glass plate is inserted in the optical path between the second reflecting mirror and the second parabolic mirror. By the passage through the optical glass plate, the optical axis in a horizontal plane is displaced to ensure the incidence of light from the first parabolic mirror on the photodetector regardless of the wavelength of the incoming light to be measured.

REFERENCES:
patent: 5233405 (1993-08-01), Wildnauer et al.

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