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US Patent 5,166,755: Spectrometer Apparatus.
Awarded: Nov. 24, 1992 / Filed: May. 23, 1990.
A spectrometer apparatus uses a spectrum resolving
sensor containing an opto-electronic monolithic array of
photosensitive elements, each preferably sub-millimeter in
size and pitch, and a continuous variable optical filter, that
is permanently aligned with the array. Polychromatic light
passing through the variable filter is spectrally resolved in
accordance with the local filter transmission function, and
is incident upon the photosensitive elements in the array.
The electrical output of each element in the array is thence
a function of the local transmission function of the variable
filter and the output of all the elements provides the
spectral contents of the polychromatic light. High spectral
resolving power is obtained by subtraction of the output
signal of adjacent elements in the array.
Full patent text, claims & figures at IBM's Patent Library, or the
US Patent & Trademark Office .
For licensing information: contact OKSI
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