Abstract
In the single projection direction, we propose a multi-camera common optical path system for three-dimensional radiation thermometry of dynamic flame, which is realized in the form of prism cascade. Different cameras can focus on certain sections of the flame along the main optical axis synchronously and independently. The image recorded by each camera linearly consists of a focused flame section and other remaining sections with defocused state. On the basis of point spread function, the spatial object-image mapping relationship is established by convolution, and the tomography of flame sections is performed by deconvolution. Then, the flame temperature is reconstructed by use of Planck's Law. The effectiveness of proposed method is verified by experiments, which could characterize the spatiotemporal evolution of flame temperature. Furthermore, it is expected to be able to achieve compatible measurements with high spatial and high temporal resolution.
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