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US 4,995,725 AGranted
Monochromator arrangement
AssigneeFraunhofer-Gesellschaft zur Forderung der angewandten Forshung e.V.
InventorsWolfgang Riedel, Manfred Knothe, Roland Grisar, Helmut Wolf, Horst M. Preier
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Abstract
A monochromator apparatus comprises a monochromator (9) and a reversing device (2) which, with the aid of four reversing mirrors (10, 11, 17, 18) shifts the exit ray (13), of a monochromator (9) introduced in an intermediate focus of an external path of rays (4, 5), in the external path of rays (5) so that the external path of rays (4, 5) will not be influenced by the presence or absence of the monochromator apparatus (2, 9).
Claims19
A monochromator apparatus comprising:
- a monochromator;
- an entrance aperture defining an entrance focus for said apparatus, said entrance aperture located on a first axis which defines the direction of propagation of light rays entering said entrance aperture, said entering light rays defining a first intermediate focus;
- an exit aperture defining an exit focus for said apparatus, said exit aperture defining a second axis which is abaxially offset from said first axis by a lateral distance;
- a diffraction grid;
- and
- a plurality of reversing mirrors for intercepting light rays which pass through said entrance aperture and for reflecting said rays onto said grid from said through said exit aperture and from the exit aperture to the exit of said monochromator apparatus, said light rays exiting said monochromator apparatus defining a second intermediate focus at the location of said first intermediate focus.
3 more elements
Dependencies are inferred from the claim text.