Imaging spectrometer and camera with rotating prism

An imaging spectrometer camera adapted to receive incident light from a medical scope, comprising:

• an optical channel receiving and focusing incident light at a first image plane to form an image at a first image plane;
• an imaging spectrometer positioned downstream from the optical channel and comprising:
• a slit formed in an optical stop at the first image plane to allow a slit-shaped portion of the incident light pass through;
• a dispersive element constructed and arranged to receive incident light from the slit and spectrally disperse it along a direction perpendicular to a width of the slit;
• a focusing lens arranged to focus the spectrally dispersed light at a second image plane such that the spectral dispersion is imaged along a first axis of the second image plane, and a spatial image of the slit width is imaged along a second axis of the image plane;
• and
• a focal plane array sensor at the second image plane operable to detect the spectrally dispersed light;
• and
• a rotating prism located distally to the slit and adapted to rotate with respect to a central optical axis of the optical channel and by its rotation to rotate the image that is focused onto the first imaging plane so that the portion of the image formed at the slit, and thereby transmitted into the spectrometer, varies as the prism rotates.