Title:
MICROBOLOMETER FOCAL PLANE ARRAY METHODS AND CIRCUITRY
Document Type and Number:
WIPO Patent Application WO2003073054
Kind Code:
A3
Abstract:
Microbolometer circuitry and methods are disclosed to allow an individual microbolometer or groups of microbolometers, such as a microbolometer focal plane array, to operate over a wide temperature range. Temperature compensation is provided, such as through circuitry and/or calibration methods, to reduce non-uniform behavior over the desired operating temperatures. For example, the relative mismatch in the temperature coefficient of resistance of an active microbolometer and a reference microbolometer is compensated by employing a variable resistor in series with the active microbolometer. The variable resistor can be calibrated over the desired temperature range to minimize the affect of the relative mismatch. Various other circuit implementations, calibration methods, and processing of the microbolometer circuit output can be employed to provide further compensation.
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Inventors:
PARRISH WILLIAM J
HEATH JEFFREY L
AZIZ NASEEM Y
KOSTRZEWA JOSEPH
POE GEORGE H
HEATH JEFFREY L
AZIZ NASEEM Y
KOSTRZEWA JOSEPH
POE GEORGE H
Application Number:
PCT/US2003/005455
Publication Date:
October 30, 2003
Filing Date:
February 24, 2003
Export Citation:
Assignee:
INDIGO SYSTEMS CORP (US)
International Classes:
G01J5/10; G01J5/20; G01J5/22; G01J5/52; H04N5/378; H04N5/33; (IPC1-7): G01J5/22
Foreign References:
| US6028309A | 2000-02-22 | |||
| US4947057A | 1990-08-07 |
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