A radiation source, a detector and a grating-containing optical unit, an optical unit comprising a radiation source, a detector and a grating, and a scanning device including the optical unit,

摘要

The optical unit of the present invention includes a first holder 11 having a radiation source 7, a second holder 17 having a radiation-sensitive detector 21, gratings 25 and 29, and a mirror 27 It's possible. The optical unit further comprises a cylindrical mounting portion (3) having a cylinder axis (5) and a wall (3a) provided transversely to the cylinder axis, the grating and the mirror comprising an optically transparent wall portion Respectively. The mounting portion has a first position surface 13 to which a first holder with a radiation source is fixed and a second position surface 23 to which a second holder with a radiation sensitive detector is fixed.