Double-sample detection method with multi-base correlation and microbolometer using the method
A microbolometer, detection method technology, applied in optical radiation measurement, electrical radiation detector, radiation pyrometry, etc.
Active Publication Date: 2019-11-29
KOREA ADVANCED INST OF SCI & TECH
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[0016] However, it is difficult to perform accurate correction in field use because the environment in actual use is very different from when the correction constants are extracted due to substrate temperature changes or case temperature changes
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[0040] The detailed description of the invention will now be described with reference to the accompanying drawings, which illustrate specific embodiments of the invention. Referring to specific embodiments shown in the accompanying drawings, the detailed description will be given to enable those having ordinary skill in the art to which the invention pertains to easily practice the invention. Embodiments other than the specific embodiment vary from each other, but are not necessarily mutually exclusive. Furthermore, it should be understood that the following detailed description, where appropriate, is not intended to be limiting.
[0041] The detailed description about specific embodiments shown in the accompanying drawings should be read in association with the accompanying drawings, which are considered a part of the entire specification. The reference direction or directivity is for the convenience of description only, and is not intended to limit the scope of the present ...
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The invention discloses a multi-reference correlation double-sampling detection method, which comprises: generating a reference signal by a plurality of unit reference units; receiving a sensing signal by a plurality of unit activation units that have absorbed infrared signals; and using the reference The pure infrared signal is detected on the basis of the sensed signal and activation cell value of the signal processing, wherein the unit reference cell does not respond to the infrared signal and is configured as a blind with the same electrical and thermal characteristics as the unit activation cell. unit. Therefore, the self-heating effect of the active cells can be precisely counteracted, the method is robust to common noise such as power supply noise, and the incoherence that occurs in the sensing circuit and includes skimming between cells can be removed fixed pattern noise. In addition, the method can improve efficiency and greatly reduce the complexity of analog and digital corrections, and can eliminate thermoelectric coolers and shutters.
Description
[0001] Cross References to Related Applications [0002] This application claims priority and all rights arising therefrom from Korean Patent Application No. 10-2015-0135675 filed September 24, 2015 under 35 U.S.C. §119, the contents of which are incorporated herein by reference in their entirety. technical field [0003] The present invention relates to a multi-reference correlation double-sampling detection method in a detection circuit using a microbolometer array and a microbolometer using the method, and in particular to a multi-reference correlation double-sampling detection method and using the Methods of microbolometers that can reduce various fixed-mode noise and easily remove thermoelectric coolers and shutters. Background technique [0004] Infrared detectors are classified into light-based detectors and heat-based detectors. Thermal-based detectors produce a temperature image of a target object by using an array of thermal sensors. In this way, a device for obt...
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IPC IPC(8): G01J5/00
CPCG01J5/00G01J5/80G01J5/22G01J2005/106G01J5/061G01J5/34
Inventor 李贵鲁金敏植朴昇贤
Owner KOREA ADVANCED INST OF SCI & TECH