| 摘要 |
<p>A display or presentation device, e.g. for advertising purposes, comprising two parabolic mirrors (11,12) whose reflective surfaces face one another and in which the focus of one mirror (11,12 respectively) is located in the central part of the other mirror (12,11 respectively). For the purpose of producing a certain visual effect, each of the mirrors (11 and 12) has a respective aperture (111 and 121) provided centrally thereof. One of the apertures (111) is intended to receive an object (13) therein, optionally a movable object, and the other aperture (121) is intended for the presentation of a true image (14) of the object. A planar glass sheet (30) may be placed adjacent the other aperture (121) or between the two mirrors (11,12). In order to provide a longer movement path for the image (14), the device may include two or more pairs of parabolic mirrors (11-12; 51-52) positioned with a common centre line of the respective foci (110,120,510,520) of the mirrors.</p> |
