Design and evaluation of a light-field multi-wavelength pyrometer

• Main Authors: Shi, Shengxian, Sun, Linlin, Luan, Yinsen, Wang, Rui, New, Tze How
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Article
• Language: English
• Published: 2023
• Subjects: Engineering::Aeronautical engineering; Electromagnetic Wave Emission; Pyrometry; Black Body; CMOS sensors; Design and Evaluations; Design and Implementations; Filter Arrays; Light Fields; Multi-Wavelength Pyrometer; Multiwavelength; Radiation Image; Radiation Intensity; Pyrometers
• Online Access: https://hdl.handle.net/10356/170748
• Institution: Nanyang Technological University

This letter describes the design and implementation of a multi-wavelength light-field pyrometer, where six-channel radiation images were captured with one CMOS sensor. Such capability is achieved by placing a 2 × 3 filter array in front of the main lens of an unfocused light-field camera, such that discrete wavelength and radiation intensity can be simultaneously recorded. It demonstrates that through black-body furnace experiments, how multi-channel radiation images can be extracted from one raw light-field multispectral image, and how accurate 2D temperature distribution can be recovered by optimization algorithms.