Abstract:Freeform surfaces have been introduced in the optical design of a two-mirror Cassegrain telescope for Earth observation purposes. The application requires two field positions at the image plane with minimum aberrations where two micro spectrometers (HAMAMATSU C12880MA) shall be placed. These micro spectrometers are small and compact devices that incorporate the slit, a concave diffractive element and the CMOS sensor in the same component. Although these are very small components their position at the image pla… Show more
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