Microsoft Word - 05_Arakelov_eng.pdf

## Design and Stabilization of Microbolometric Arrays (MBA) in Infrared Ranges: A Focus on Thermopiles

This article explores the technical features and challenges associated with microbolometric arrays (MBA), a type of infrared radiation detector used in various high-tech applications like missile guidance, thermal imaging systems, and anti-aircraft complexes.

Key Points:

MBA Structure: MBA consist of microbridges built on silicon plates, mounted in evacuated packages to minimize heat leakage. Their operating temperature stability is crucial for accurate measurements.
Stability Requirements: The accuracy of MBA temperature control depends on factors like the bolometer's thermal resistance, absorptivity, lens transmission, area, and object radiation power density.
Calculated Accuracy: Based on calculations, achieving a change in observed object temperature (TOB) as small as 1.5×10⁻¹ K requires an accuracy of thermal stabilization (TB) around 5×10⁻³ K.
Thermoelectric Thermal Stabilization: The article emphasizes the use of thermopiles for precision thermal stabilization of MBA. Thermopiles offer distinct advantages like small size, low mass, and fast response time, making them ideal for this application.
* Active vs. Passive Stabilization: Active stabilization using thermopiles is discussed as a solution to achieve desired temperature control within a wide ambient temperature range.

Conclusion:

Given the stringent stability requirements of MBA, the article concludes that a thermopile is the most suitable active thermal stabilization method due to its unique properties.