Method and apparatus for reading detector arrays
AssigneeTeknologian tutkimuskeskus VTT Oy
InventorsJuha Hassel, Hannu Sipola, Andrey Timofeev, Visa Vesterinen
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Abstract
A solution for reading detector arrays is disclosed. The solution comprises generating (400) an excitation signal, varying (402) the frequency of the excitation signal in time, supplying (404) the excitation signal to a detector array comprising a set of thermal detectors. The number of detectors corresponds to the frequencies of the excitation signal. In the solution, the signal is demodulated (406) at the output of the detector array and time-multiplexed base band signal is obtained. An analogue to digital conversion is performed (408) to the time-multiplexed base band signal and the base band signal is demultiplexed (410) to obtain a set of detector signals.
Claims16
A method of for reading detector arrays, comprising
- generating an excitation signal;
- varying the frequency of the excitation signal in time;
- supplying the excitation signal to a detector array comprising a set of thermal detectors, wherein the number of detectors corresponds to the frequencies of the excitation signal;
- demodulating the signal at the output of the detector array and obtaining time-multiplexed base band signal;
- performing analogue to digital conversion to the time-multiplexed base band signal;
- and
- demultiplexing the base band signal to obtain a set of detector signals.
An arrangement for reading detector arrays, comprising
- a signal generator configured to generate an excitation signal, vary the frequency of the excitation signal in time and supply the excitation signal to a detector arrays comprising a set of thermal detectors, wherein the number of detectors corresponds to the frequencies of the excitation signal;
- a demodulator configured to demodulate the signal at the output of the detector array and obtain a time-multiplexed base band signal;
- a converter configured to perform analogue to digital conversion to the time-multiplexed base band signal;
- and
- a demultiplexer configured to demultiplex the base band signal to obtain a set of detector signals.
Dependencies are inferred from the claim text.