Shutter-less calibration of uncooled infrared cameras
Infrared (IR) cameras based on microbolometer focal plane arrays (FPAs) are the most widely used cameras in thermography. New fields of applications like handheld devices and small distributed sensors benefit from the latest sensor improvements in terms of cost and size reduction. In order to compen...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2016-01-01
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| Series: | Journal of Sensors and Sensor Systems |
| Online Access: | http://www.j-sens-sens-syst.net/5/9/2016/jsss-5-9-2016.pdf |
| _version_ | 1818423166557487104 |
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| author | A. Tempelhahn H. Budzier V. Krause G. Gerlach |
| author_facet | A. Tempelhahn H. Budzier V. Krause G. Gerlach |
| author_sort | A. Tempelhahn |
| collection | DOAJ |
| description | Infrared (IR) cameras based on microbolometer focal plane arrays (FPAs) are
the most widely used cameras in thermography. New fields of applications like
handheld devices and small distributed sensors benefit from the latest sensor
improvements in terms of cost and size reduction. In order to compensate for
disturbing influences derived from changing ambient conditions, radiometric
cameras use an optical shutter for online recalibration purposes, partially
also together with sensor temperature stabilization. For these new
applications, IR cameras should consist only of infrared optics, a sensor
array, and digital signal processing (DSP). For acceptable measurement
uncertainty values without using an optical shutter (shutter-less), the
disturbing influences of changing thermal conditions have to be treated based
on temperature measurements of the camera interior. We propose a compensation
approach based on calibration measurements under controlled ambient
conditions. All correction parameters are determined during the calibration
process. Without sensor temperature stabilization (TEC-less), the pixel
responsivity is also affected by the camera temperature changes and has to be
considered separately. This paper presents the details of the compensation
procedure and discusses relevant aspects to gain low temperature measurement
uncertainty. The residual measurement uncertainty values are compared to the
shutter-based compensation approach. |
| first_indexed | 2024-12-14T13:37:50Z |
| format | Article |
| id | doaj.art-653d230b34e748ee86feec665a1db178 |
| institution | Directory Open Access Journal |
| issn | 2194-8771 2194-878X |
| language | English |
| last_indexed | 2024-12-14T13:37:50Z |
| publishDate | 2016-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Journal of Sensors and Sensor Systems |
| spelling | doaj.art-653d230b34e748ee86feec665a1db1782022-12-21T22:59:32ZengCopernicus PublicationsJournal of Sensors and Sensor Systems2194-87712194-878X2016-01-015191610.5194/jsss-5-9-2016Shutter-less calibration of uncooled infrared camerasA. Tempelhahn0H. Budzier1V. Krause2G. Gerlach3Technische Universität Dresden, Electrical and Computer Engineering Department, Solid-State Electronics Laboratory, Dresden, GermanyTechnische Universität Dresden, Electrical and Computer Engineering Department, Solid-State Electronics Laboratory, Dresden, GermanyTechnische Universität Dresden, Electrical and Computer Engineering Department, Solid-State Electronics Laboratory, Dresden, GermanyTechnische Universität Dresden, Electrical and Computer Engineering Department, Solid-State Electronics Laboratory, Dresden, GermanyInfrared (IR) cameras based on microbolometer focal plane arrays (FPAs) are the most widely used cameras in thermography. New fields of applications like handheld devices and small distributed sensors benefit from the latest sensor improvements in terms of cost and size reduction. In order to compensate for disturbing influences derived from changing ambient conditions, radiometric cameras use an optical shutter for online recalibration purposes, partially also together with sensor temperature stabilization. For these new applications, IR cameras should consist only of infrared optics, a sensor array, and digital signal processing (DSP). For acceptable measurement uncertainty values without using an optical shutter (shutter-less), the disturbing influences of changing thermal conditions have to be treated based on temperature measurements of the camera interior. We propose a compensation approach based on calibration measurements under controlled ambient conditions. All correction parameters are determined during the calibration process. Without sensor temperature stabilization (TEC-less), the pixel responsivity is also affected by the camera temperature changes and has to be considered separately. This paper presents the details of the compensation procedure and discusses relevant aspects to gain low temperature measurement uncertainty. The residual measurement uncertainty values are compared to the shutter-based compensation approach.http://www.j-sens-sens-syst.net/5/9/2016/jsss-5-9-2016.pdf |
| spellingShingle | A. Tempelhahn H. Budzier V. Krause G. Gerlach Shutter-less calibration of uncooled infrared cameras Journal of Sensors and Sensor Systems |
| title | Shutter-less calibration of uncooled infrared cameras |
| title_full | Shutter-less calibration of uncooled infrared cameras |
| title_fullStr | Shutter-less calibration of uncooled infrared cameras |
| title_full_unstemmed | Shutter-less calibration of uncooled infrared cameras |
| title_short | Shutter-less calibration of uncooled infrared cameras |
| title_sort | shutter less calibration of uncooled infrared cameras |
| url | http://www.j-sens-sens-syst.net/5/9/2016/jsss-5-9-2016.pdf |
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