OPTICAL UNIT COMPRISING A RADIATION SOURCE, A DETEOPTICAL UNIT COMPRISING A RADIATION SOURCE, A DETECTOR AND A GRATING, AND SCANNING DEVICE INCLUDING CTOR AND A GRATING, AND SCANNING DEVICE INCLUDING THE OPTICAL UNIT THE OPTICAL UNIT

摘要

An optical unit includes a first holder with a radiation source, a second holder with a radiation-sensitive detector, a grating, and a mirror. The unit further includes a cylindrical mounting having a cylinder axis and a wall oriented transversely to the cylinder axis, the grating and the mirror being formed by optically transparent wall portions of the wall. The mounting has a first positioning surface to which the first holder with the radiation source is secured and a second positioning surface to which the second holder with the radiation-sensitive detector is secured.