Highly emissive spaceborne blackbody radiation source based on light capture.

Area of Science:

• Optics and Photonics
• Aerospace Engineering
• Metrology

Background:

• Accurate infrared calibration is crucial for spaceborne infrared remote sensing applications.
• Existing blackbody radiation sources face challenges in achieving the required emissivity for advanced calibration needs.

Purpose of the Study:

• To propose and validate a novel highly emissive blackbody design for spaceborne infrared applications.
• To enhance infrared value traceability and calibration accuracy for remote sensing instruments.

Main Methods:

• Developed a highly emissive blackbody utilizing cubic reflection and light capture absorption.
• Performed emissivity simulations using ray tracing to analyze reflection effects (specular, near specular, diffuse).
• Fabricated and experimentally tested two blackbody prototypes with near specular reflection (NSR) and diffuse reflection (DR).

Main Results:

• Simulation and experimental results for blackbodies with NSR and DR demonstrated consistency.
• Analysis confirmed the influence of different reflection types (SR, NSR, DR) on blackbody emissivity.
• The proposed design shows potential for achieving high emissivity required for infrared calibration.

Conclusions:

• The novel blackbody design effectively achieves high emissivity through a combination of cubic reflection and absorption.
• Experimental validation confirms the simulation accuracy, supporting the design's suitability for spaceborne infrared calibration.
• This advancement contributes to improved accuracy in infrared remote sensing and metrology.