AN IMPROVED IMAGE SCANNING UNIT

摘要

An improved scanning device adapted to direct an image through a nodding mirror (1) to a collecting mirror (5) scanned in turn by a rotating scanner (8) in which the collecting mirror is a half spherical mirror (5) and the correcting elements are mirrors (6, 7) carried on a scanner (8) having its axis of rotation (9) normal to the optical axis (14) of the collecting mirror (5) and intersecting same whereby to direct the image generally along the optical axis (14) of the collecting mirror (5) to a fixed mirror (10) and thence to a detector (11).