Optics: measuring and testing – By dispersed light spectroscopy – For spectrographic investigation
Patent
1990-01-18
1992-07-07
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
For spectrographic investigation
356326, 356331, G01J 312
Patent
active
051277280
ABSTRACT:
A device for the spectral dispersion of light suitable for use in a spectrographic mode with arrays of solid state photo-detectors. Light from an entrance aperture passes through a dispersing prism with two curved, refracting surfaces both operating near their aplanatic conjugates. After being reflected by a concave mirror located behind the prism, light returns through the prism in the opposite direction, the refractions at each face again being nearly aplanatic. Spectrally dispersed images of the entrance aperture are formed on a plane well separated from the entrance aperture and nearly normal to the incident light rays. Good image quality is maintained over a broad range of operating wavelengths simultaneously, allowing large spectral intervals to be surveyed without moving any of the elements of the system.
REFERENCES:
patent: 1007346 (1911-10-01), Fery
patent: 3626615 (1970-03-01), Wilson
Hackwell John A.
Warren David W.
Burke William J.
Evans F. L.
Hantis K. P.
The Aerospace Corporation
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