Spectrometer comprising a slit box.

摘要

For exact positioning of optical elements, a spectrometer is provided with a holder which is constructed using plates having a sector of circle shape and a side wall portion comprising a cylindrical surface portion. The cylindrical surface portion is provided with an exactly circular abutment face in which an entrance slot and an exit slot are provided. Relative to this abutment face, an entrance slit and an exit slit can be extremely exactly positioned with respect to one another along an exact circle. The holder is preferably constructed using two axially stacked compartments, in a cylindrical surface portion of which the slot or slots is/are provided between the compartments. <IMAGE>