This wide angle design has a 90 degree full field of view.  It has a diffraction limited performance for two spectral bands.  The optics in this design consist of off-shelf (stock) optics as well as custom sperical and aspheric surfaces.  This particular design is one of four WAHL sensor designs done for DRA.
LOD Designs

Wide Angle Hyperstectral Lens (WAHL) Sensor Design: