Two-dimensional spectrometer

Details Two-dimensional spectrometer Two-dimensional spectrometer

1989-12-13

1991-01-15

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01J 328, G01J 336

Patent

active

049848887

ABSTRACT:
The invention contemplates a two-dimensional spectrometer wherein a single catadioptric system is both the collimator and the camera for two-pass use of any two-dimensionally dispersed spectrometer. Off-axis aberration effects are minimized by arranging a fiber optic as the light-entrance aperture, on the central optical axis of the spectrometer and in close proximity to or centrally inserted in a two-dimensional array detector at the image plane. In other words, the grating of the spectrometer is also a reflector which folds admitted and dispersed light for return to the image plane along essentially the same path and through the same optical elements as are used on the incoming pass of light to the diffraction grating. The invention is shown for its applicability to each of various types of two-dimensional spectrometer-design configurations.

REFERENCES:
patent: 2658423 (1972-04-01), Elliott
An Autocollimating F/1 Camera for Use with Echelle Spectrographs Using Image Converters, Meinel, SPIE, vol. 172, Instrumentation in Astronomy III, 1979.

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