Focal plane imaging array with internal calibration source

Details Focal plane imaging array with internal calibration source Focal plane imaging array with internal calibration source

1993-11-12

1995-08-01

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Testing or calibrating of radar system

By monitoring

342 53, G01S 740

Patent

active

054383366

ABSTRACT:
A focal plane imaging array (FPIA) (16) for use in a direct detection imaging device (10) for conducting radiometric imaging at microwave and millimeter-wave frequencies is disclosed as having an internal electronic calibration source (36). The plurality of energy detecting pixel elements (14) which comprise the FPIA (16) include a detection circuit (34) and a calibration circuit (36). The calibration circuit (36) is uni-directionally coupled to the detection circuit (34) to allow a known calibration signal "pulse" to be introduced into the detection circuit (34). The calibration pulse is processed by the pixel detection circuit and the output signal is compared with the pixel's responsivity value. Adjustments in the pixel gain and sensitivity may then be made as appropriate.

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patent: 5270528 (1993-12-01), Ogikubo
patent: 5276321 (1994-01-01), Chang et al.

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