Monochromator

Details Monochromator Monochromator

1983-06-10

1986-03-11

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With monochromator structure

356308, G01J 318

Patent

active

045752435

ABSTRACT:
A monochromator comprises a first and a second concave grating. An entrance slit is imaged by the concave grating in the plane as a spectrum. A disc comprises a spiral slot. A section of the slot forms an intermediate slit periodically sweeping transversely across the spectrum. A concave mirror images the fanning point of the concave grating. Thereby the fanned beams are recombined to a single beam. An exit slit is located in an image plane in which an image of the entrance slit is generated. The spectrum can be scanned quickly and cyclically without the gratings having to be rotated. There is also the effect of a double monochromator. Another embodiment comprises two concave mirrors to generate the image.

REFERENCES:
patent: 3865490 (1975-02-01), Grossman
patent: 4235518 (1980-11-01), Greiner
Olson, The Reviews of Scientific Instruments, vol. 31, No. 8, Aug. 1960, pp. 844-849.
White, Conference: Proceedings of the Seminar on Remote Sensing of Earth Resources and Environment, Palo Alto, California, Nov. 1971, pp. 111-114.

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