Method to remove the effect of ambient temperature on radiometric calibration

Area of Science:

• Infrared imaging
• Radiometric calibration
• Optical engineering

Background:

• High-precision radiometric calibration is vital for quantitative analysis in infrared imaging systems.
• Simultaneous calibration and radiometry are often not performed, leading to errors due to ambient temperature discrepancies.
• Existing methods struggle to correct for these temperature-induced measurement errors effectively.

Purpose of the Study:

• To investigate the impact of ambient temperature on radiometric calibration for cooled infrared systems.
• To develop a method for compensating ambient temperature effects on calibration results.
• To enable accurate radiometric measurements under varying ambient temperatures and integration times.

Main Methods:

• Studied the effect of ambient temperature on radiometric calibration.
• Derived a mathematical relationship between calibration results, ambient temperature, and integration time.
• Developed and experimentally validated a novel compensation method for cooled infrared systems.

Main Results:

• The proposed method effectively compensates for ambient temperature variations.
• Accurate radiometric calibration is achievable under diverse ambient temperatures.
• The method is compatible with arbitrary integration times, enhancing measurement flexibility.

Conclusions:

• The novel compensation method ensures the accuracy of radiometric calibration for cooled infrared systems.
• This approach overcomes the limitations of ambient temperature discrepancies.
• It enables reliable quantitative analysis in infrared imaging across various environmental conditions.