The spectrometer of claim 1 wherein the prism face is nondispersive and further said face is positioned to receive the radiation impinging on the prism.ġ7. The spectrometer of claim 1 which includes means to rotate the prism.ġ6. The spectrometer of claim 1 wherein said prism is a 30°, 60°, and 90° prism.ġ5. The spectrometer of claim 12 wherein a detector is located at said image.ġ4.
The spectrometer of claim 1 wherein said focal plane is followed by means to form an image of the grating surface.ġ3.
The spectrometer of claim 1 wherein the focal length optics of said device are 0.5 meter and the resolution is about 0.1 angstroms at 5,000 angstroms.ġ2. The spectrometer of claim 1 which includes a detector for the emitted radiation in said focal plane.ġ1. The spectrometer of claim 1 which includes a focusing mirror and wherein said grating is positioned such that the incident radiation on said grating is directed to said focusing mirror by passing through said prism.ġ0. The spectrometer of claim 7 wherein said detector is a vidicon tube.ĩ. The spectrometer of claim 6 wherein said detector is a two-dimensional electrooptical detector.Ĩ. The spectrometer of claim 3 which includes a detector for the emitted radiation in at least one of said focal planes.ħ. The spectrometer of claim 3 which includes a spatial filter in at least one of said focal planes.Ħ. The spectrometer of claim 3 which includes a spectral filter in at least one of said focal planes.ĥ. The spectrometer of claim 1 which includes means to form a multiplicity of exit focal planes, each of said focal planes being essentially square and capable of covering at least one spectral octave.Ĥ. The spectrometer of claim 1 wherein means are provided to rotate said prism around an axis passing through the central ray of the incident beam and parallel to the said prism face.ģ.
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