The ultra precision differential surface source blackbody, as an important component of the infrared calibration system, has two operating modes: differential mode and absolute mode. The differential mode uses a reference blackbody with a fixed ambient temperature (usually 20 ℃ or 25 ℃) as a reference, and achieves high-sensitivity relative temperature measurement by comparing the temperature difference between the target blackbody and the reference. It can accurately capture small thermal radiation differences and is suitable for high-precision temperature difference detection scenarios. Absolute mode allows for independent setting and maintenance of radiation source temperature, achieving constant radiation output through a high-precision temperature control system, providing reliable temperature standards for devices such as infrared thermometers and thermal imagers.

TCB series ultra precision differential surface source blackbody from Shanghai Mingce TechnologyAdopting advanced control system, it has high emissivity, high uniformity and mK level temperature resolution, and can operate stably in the range of -20 ℃ to 70 ℃. Its dual-mode design not only improves the accuracy and flexibility of temperature calibration, but also provides high reliability technical support for radiometric calibration and non-uniformity correction of infrared imaging equipment.

Keywords: Ultra precision differential surface source blackbody; Differential mode; Absolute mode; Infrared radiation calibration; temperature control

1、 Introduction to two working modes

(1) Differential mode - focusing on small temperature differences

This mode takes the ambient temperature (usually a fixed reference blackbody at 20 ℃ or 25 ℃) as a reference and achieves measurement by comparing the temperature difference between the target blackbody and the reference blackbody. This mode focuses on changes in relative temperature and can sensitively capture extremely small thermal differences, thereby obtaining high-precision radiation data. Due to its possessionvery highThe differential mode is highly suitable for high-precision experiments or testing scenarios that require detecting subtle temperature changes due to its sensitivity and stability.

(2) Absolute mode - provides independent temperature reference

In absolute mode, the temperature of the blackbody radiation source can be set and controlled separately, and its surface radiation temperature is clearly known and remains stable. Relying on a precise temperature control system, this mode can achieve accurate temperature setting and constant maintenance, thereby ensuring the reliability of absolute temperature. As an independent standard source, it is commonly used for calibration of infrared thermometers and thermal imagers, providing stable and traceable temperature references for various measuring devices. It is worth noting that in practical applications, the combination of differential mode and absolute mode can significantly improve the accuracy of measurements and the completeness of data, obtaining more comprehensive experimental results.

2、 Introduction to TCB series ultra precision differential surface source blackbody

The TCB series ultra precision differential surface source blackbody from Shanghai Mingce Electronic Technology can output high standard infrared radiation and is widely used in ground radiation calibration experiments and performance testing of infrared imagers.

This series of products adopts advanced temperature control system, which can achieve precise adjustment within a wide temperature range. It has excellent performance such as high emissivity, high uniformity, and high temperature control accuracy, and can adapt to calibration and non-uniformity correction tasks in various laboratory and field environments.

The main features include:

• Equipped with low-temperature frost prevention function

• Free switching between absolute and differential modes

• High emissivity and uniformity of radiation surface

• The temperature resolution can reach the millikelvin (mK) level

• Stable operation within a wide temperature range of -20 ℃ to 70 ℃

  
  

The differential and absolute modes are the key to fully utilizing the performance of ultra precision surface source blackbody.TCB series ultra precision differential surface source blackbody from Shanghai Mingce TechnologyBy flexibly supporting dual-mode operation, reliable solutions are provided for different experimental and calibration needs, playing an important role in the precision radiometric calibration and performance optimization of infrared imaging equipment.