Design, simulate a spectrometer in zemax

Hi, i'm looking for someone who can help with my lab project, i want to design a high-resolution (0.5 nm) visible ([400nm-800nm])spectrometer in opticstudio.
I'm restricted by a 1200 lines / mm reflection diffraction grating and a 28.672 mm wide ccd detectors with a 14um pixel size.

Thank you