Signal processor for matrix arrays

Details Signal processor for matrix arrays Signal processor for matrix arrays

1984-10-11

1987-07-14

Krass, Errol A.

Boots, shoes, and leggings

250332, G01T 120

Patent

active

046807233

ABSTRACT:
Matrix arrays, in particular infra-red arrays, suffer from non-uniformity in output from the individual elements in the array. This is due to each element in the array having for example, its own characteristic responsivity and leakage current, and is seen in the array output as a pattern of offset values. These offset values must be removed from the output of the array if useful digital information is to be obtained. One known method of doing this is to show the array a black body at a known uniform temperature and use the output from the array to cancel the offset values. However, the dynamic range of the system is directly related to the range of offset values obtained and also to the size of the digitizer. Large-size digitizers have relatively slow sampling rates and in order to have a higher sampling rate, a small-size digitizer must be used. The signal processing system described herein corrects for offset values and is able to provide a high sampling rate by using a small-size digitizer.

REFERENCES:
patent: 4072863 (1978-02-01), Roundy
patent: 4323977 (1982-04-01), Arseneau
patent: 4419692 (1983-12-01), Modisette et al.
patent: 4499547 (1985-02-01), Inuiya et al.
patent: 4573133 (1986-02-01), White

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