Title:
デジタルオフセット補正装置及びオフセット提供方法
Document Type and Number:
Japanese Patent JP4398515
Kind Code:
B2
Abstract:
An offset corrector for a focal plane array. A bolometer array configured in a row and column readout format has dedicatad column circuits to measure the resistance of each bolometer in the column. A high speed on-chip analog to digital converter converts the analog sensor signal to a digital representation. Since the response of each bolometer varies, an offset controller, connected to the output of the analog to digital converter, corrects the digital representation for variations in individual bolometer response. Each pixel has a corresponding dynamically computed offset stored in an offset memory. The offset is computed when a chopper or shutter blocks radiation from the local plane array. The focal plane array is temperature stabilized to a predetermined temperature to keep bolometer response within a predetermined bandwidth.
Inventors:
Butler Neil Earl
Application Number:
JP50457197A
Publication Date:
January 13, 2010
Filing Date:
June 28, 1996
Export Citation:
Assignee:
Lockheed Martin IR Imaging Systems
International Classes:
G01D3/028; H04N5/33; G01J1/44; G01J5/20; H04N5/365; H04N5/367
Domestic Patent References:
| JP64007657A |
Foreign References:
| US4752694 | ||||
| WO1994000950A1 |
Attorney, Agent or Firm:
Kenji Yoshida
Jun Ishida
Jun Ishida