Spectrometer with selectable area detector

Details Spectrometer with selectable area detector Spectrometer with selectable area detector

1983-09-29

1985-09-17

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250338, 250349, 2503581, 250370, H01L 2706, G01J 520

Patent

active

045422958

ABSTRACT:
A Fourier transform infrared spectrometer utilizes a selectable area infrared detector to optimize performance of the instrument depending upon the nature of the sample being analyzed. The detector includes an inner detecting segment and one or more outer detecting segments which extend at least partially around the inner segment and are electrically isolated therefrom. In those cases where a small area detector provides optimal sensitivity and performance, only the inner detecting segment is enabled to contribute to the output of the detector. In those cases where a larger area detector provides optimal sensitivity and performance, one or more of the outer detecting segments are enabled to contribute to the output of the detector, either alone or in combination with the inner segment. Thus, a single detector in the instrument provides optimal sensitivity and performance for a wide range of applications.

REFERENCES:
patent: 3415994 (1968-12-01), Fitti, Jr.
patent: 3666359 (1972-05-01), Lee
patent: 3742239 (1973-06-01), Gale
patent: 4213137 (1980-07-01), Pines
J. Gast and L. Genzel, "An Amplitude Fourier Spectrometer for Infrared Solid State Spectroscopy", Optics Communications, vol. 8, No. 1, (May 1973), pp. 26-30.

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