Monochromator with a telecentric dispersive lens

摘要

The invention relates to a monochromator including a telecentric dispersive lens (TD0) in which the collimated diffracted beam (2) at an angle beta with respect to the normal to the telecentric dispersive lens (TD0) is focused at the focus of a telescope (T2) fitted with a straight slit (S') the optical axis of the telescope (T2) being merged with the direction of the diffracted beam (2) and the slit (S') being parallel to the direction of the lines of the telecentric dispersive lens (TD0), the collimated incident beam (1), at an angle alpha giving the collimated diffracted beam (22) at an angle beta after diffraction by the telecentric dispersive lens (TD0).