A portable device (10) for displaying graphical information (12) on a
remote object (14), the device comprising: a
projector (18), in particular a
video projector, for projecting graphical information (12); a camera (20) for detecting the position and / or orientation of the object (14); a translucent mirror (22) having a first surface and an opposite second surface; and a control device (28) for controlling the
projector (18) and the camera (20) and for evaluating the image detected by the camera (20). The device (10) further comprises a portable housing (16) in which at least the
projector (18), the camera (20) and the translucent mirror (22) are mounted. The projector (18), the camera (20) and the translucent mirror (22) are arranged relative to each other in such a way that a first surface of the translucent mirror (22) is in the
optical path of the projector (18) and a second surface of the translucent mirror (22) is in the viewing angle of the camera (20). In a coaxial region of the device (10), either an
optical axis (24) of a light path of the projector (18), which is deflected by the translucent mirror (22) by reflection, is coaxial with an
optical axis (26) of the camera (20), on which light transmitted by the translucent mirror (22) is incident, or an
optical axis (24) of a light path of the projector (18), which is transmitted by the translucent mirror (22), is coaxial with an optical axis (26) of the camera (20), on which light deflected by the translucent mirror (22) is incident.