The technique is based on the use of proper imaging systems for the acquisition of the thermal radiation that every body at a given temperature emits from this radiation, knowing the thermal emissivity, it is possible to calculate the temperature of the body. Infrared (IR) thermography is an important nondestructive technique with applications in different fields, ranging from engineering to industry, from bio-medicine to emergency relief, up to heritage conservation, as extensively reviewed in, ,. The thermal endoscope was designed with dimensions also compatible for robotic-assisted/traditional minimally-invasive surgery. In general, the device enables to perform thermography in applications in which traditional larger equipment cannot be employed, as nondestructive diagnostics in confined space in the engineering field. The Infrared Vision Software is provided for controlling the acquisition of thermal frames, and for the thermographic calculation of the object temperature from the input parameters on object surface emissivity and environment. The thermal endoscope unit is controlled by a Raspberry external unit. Two PCBs were developed for assembling the endoscope in two different schemes, to enable frontal or lateral thermal vision setup. The sensor and the PCB can be inserted into a cylindrical protective case of diameter down to 15mm, inox tube or plastic, 3D printable envelope, with an optical window in Germanium. The implementation of a thermal endoscope based on the LWIR camera cores Lepton and a custom miniaturized electronics is reported.
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