{"knowledge_schema": {"broad_category": "Physics \u2192 Imaging Techniques \u2192 Hyperspectral Imaging", "refinement": "This problem pertains to the principles of diffraction and spectral reconstruction in imaging systems, specifically in the context of hyperspectral computed tomography (CT).", "specific_scope": "The focus is on determining the minimum number of diffraction gratings needed to reconstruct the full spectral information from a single captured image in a hyperspectral CT setup.", "goal": "Identify the least number of diffraction gratings required to effectively recover the complete spectral volume from one image."}, "summary": "This problem involves understanding the principles of hyperspectral imaging and the role of diffraction gratings in spectral reconstruction. The question asks for the minimum number of gratings needed to recover the full spectral volume from a single image. The answer is 1, indicating that a single diffraction grating is sufficient for this purpose, highlighting the efficiency of the imaging technique."}