Design of a wide band multispectral imaging system with dynamic local high spatial resolution

Multispectral imaging systems capture spatial and spectral data simultaneously. Aperture segmentation reduces system size versus multi-lens designs, but lowers spatial resolution. Wide working band requires different lens counts per channel to correct chromatic aberration, increasing complexity. We propose a local high spatial resolution imaging method for segmented wide-spectral systems, using a main image plane and a spatial light modulator (SLM) that dynamically adjusts local aberration, enabling high spatial resolution observation of regions of interest. The system operates at 500–1600 nm (visible and near-infrared groups, each with four channels, total eight channels), with a 20° field of view. Each exposure captures all four channels of either group. With SLM, the RMS radius of the selected field drops, up to about 50%. MTF differences between tangential and sagittal planes reduce, as does wave aberration. This design enables simultaneous overall and local target observation for complex environments.