Small-sized thermal imaging camera with micro-scanning

Kremis, I.I., Gladkov, R.A., Turbin, A.V., Aldokhin, P.A., Kalinin, V.S.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Кремис И.И., Гладков Р.А., Турбин А.В., Алдохин П.А., Калинин В.С. Малогабаритная тепловизионная камера с микросканированием // Оптический журнал. 2023. Т. 90. № 6. С. 50–60. http://doi.org/10.17586/1023-5086-2023-90-06-50-60

Kremis I.I., Gladkov R.A., Turbin A.V., Aldokhin P.A., Kalinin V.S. Small-sized thermal imaging camera with micro-scanning [In Russian] // Opticheskii Zhurnal. 2023. V. 90. № 6. P. 50–60. http://doi.org/10.17586/1023-5086-2023-90-06-50-60

For citation (Journal of Optical Technology):

Igor Kremis, Roman Gladkov, Alexey Turbin, Pavel Aldokhin, and Vitaly Kalinin, "Small-sized thermal imaging camera based on micro-scanning," Journal of Optical Technology. 90(6), 317-323 (2023)

Abstract:

Subject of study. Thermal imaging camera with microscanning based on smallformat, 320ґ256 photodiodes made of cadmiummercury telluride, matrix photodetector, spectral range 8–10 microns. Aim of study. Creation of a compact thermal imaging camera with a spectral range of 8–10 microns based on a smallformat cadmiummercury telluride matrix photodetector using gearless electromechanical drives for changing fields of view, subfocusing, calibration and microscanning of the scene to improve spatial resolution parameters and threshold sensitivity. Method. The combined use of technical solutions for the mechanical movement of optical components, correction of residual inhomogeneity of the sensitivity of the photodetector and microscanning of the observation scene. Main results. A thermal imaging camera with microscanning based on a smallformat (320ґ256 pixels of cadmiummercury telluride) matrix photodetector with a spectral range of 8–10 microns has been developed. The camera uses gearless electromechanical drives allowing microscanning of the observation scene, changing fields of view, focusing and channel calibration. The camera is equipped with 4fold zoom range lens with a maximum field of view of 21.7°ґ17.5° and a spatial resolution of 2.27 mrad^–1 in microscan mode. The combination of the proposed solutions made it possible to obtain a highquality thermal imaging image with a temperature difference equivalent to noise equal to 23 mK. Practical significance. The thermal imaging camera can work in the field of nondestructive testing, surveillance and environmental monitoring. The proposed technical solutions will be useful for evaluating the highresolution parameters and threshold sensitivity of thermal imaging mechanisms using smallformat matrix photodetectors.

Keywords:

filtration, two-point correction, thermal imager, thermal imaging camera, microscanner

OCIS codes: 250.0040, 250.4745, 230.2090, 230.0250, 100.2960, 100.2550, 100.2000

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