Optical performance of NI-OA at λ = 960 nm determined at two positions corresponding to the field centre (top row) and a corner of the NISP field of view (bottom row). The wavefront maps in the first column are based on a Shack-Hartmann sensor measurement, the PSFs in the second column are derived from these wavefronts, and the PSFs in the third column are directly observed with a CCD camera. We note that the logarithmic scale is over four orders of magnitude.