| 摘要 |
A two-point image formation optical device images a real image and a virtual image in a space on the same side as a point light source with respect to one plane on the device and in a space on the opposite side, respectively. In the two-point image formation optical device, a plurality of two-surface corner reflectors each comprising two planar mirror surfaces orthogonally intersected with each other are so disposed that the intersecting lines of the two mirror surfaces are parallel with each other on a first plane. With this configuration, a virtual image is imaged, with respect to the first plane, in a space on the side opposite to a point light source toward which the two mirror surfaces are oriented and a real image is imaged in a space on the same side as the point light source. This makes it possible to observe the virtual image and the real image that lie on a straight line from a view point in the space on the same side as the point light source. |
