During January 2001, a new setup was assembled to measure filter transmission on Cerro Tololo. The fiber optics spectrometer S2000 is a crossed Czerny-Turner design, with no moving parts.
Light enters the optical fiber and is efficiently transmitted to the spectrometer.
Once in the spectrometer, a spherical mirror collimates the divergent light emerging from the optical fiber. A plane grating diffracts the collimated light, the resulting diffracted light is focused by a second spherical mirror. A ground glass in front of the lamp is used to create a diffuse source. The Spectrometer comes with the OOIBase32 software, which is the spectrometer operation software. From time to time it is necessary to check the calibration of the spectrometer's wavelength.