Spectrometer

Details Spectrometer Spectrometer

1998-02-10

1998-11-03

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356305, G01J 318

Patent

active

058317295

ABSTRACT:
It is the objective of the present invention to provide a spectrometer of which the modulation transfer function (MTFs) in a spectral direction and in a direction perpendicular to the spectral direction is enhanced for all wavelengths ranging from the short to the long. For a spectrometer according to the present invention, a spherical face is employed for collimating and condensing light in a spectral direction, instead of the spherical collimator/condenser that is used for a conventional spectrometer, and troidal faces in a non-spherical shape, such as in a paraboloidal shape, are provided for collimating and condensing in a direction perpendicular to the spectral direction. The focusing distance on the non-spherical face is a distance so calculated that the modulation transfer function is improved for all the wavelengths ranging from the short to the long. In addition, a detector is inclined at such an angle that the modulation transfer function is improved for all the wavelengths ranging from the short to the long.

REFERENCES:
Heath, et al. "The Solar Backscatter Ultraviolet and Total Ozone Mapping Spectrometer (SBUV/TOMS) for NIMBUS G", Optical Engineering, vol. 14, Jul.-Aug. 1975, pp. 323-332.

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