Freeform spectrometer enabling increased compactness

摘要

We present optical designs with freeform optics in the context of hyperspectral imaging.Results show designs that are 5×more compact in volume than similar designs using conventional spherical or aspherical surfaces.We will show how combining the concepts of spatial and spectral-band broadening,which will be introduced in this paper,led to the improvement in compactness that is uniquely enabled by freeform optics.