OPTICAL DISPLAY DEVICE

摘要

A pair of concave mirrors are placed with their concave sides toward each other and one is optically apertured, either with a hole in the mirror or by an unsilvered portion in a mirror of transparent material. An object placed at the mirror that is not apertured will project a real image at the region of the aperture if the curvature and spacings of the mirrors are correct. The image may be left-right reversed or may have the same orientation as the object depending upon the reflective paths of rays from the object. The image may be magnified or reduced in size depending upon curvatures and spacings of the mirrors.