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US 4,542,295 AGranted
Spectrometer with selectable area detector
OwnerDavid R. Mattson, Patrick J. Coffeyinventors
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OwnerDavid R. Mattson, Patrick J. Coffeyinventors
Estimating the term…
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.
Apparatus for analyzing a sample by interacting a beam of radiant energy with the sample, said apparatus including means for detecting the beam of radiant energy after interaction with the sample and for producing an electrical output corresponding thereto, said detecting means comprising:
Apparatus for analyzing a sample by interacting a beam of infrared radiation with the sample, said apparatus comprising:
Dependencies are inferred from the claim text.