Patent ID: 8299980
Filing Date: 2012-10-30
Classification: G02B

Abstract:
1. An image display device comprising: a floating image display means comprising: a floating image recognizing means formed of a plate-like light-transmissive member that is light transmissive, the plate-like light-transmissive member having a size that allows all light left from the image screen and focused on the image plane to be passed therethrough, wherein the plate-like light-transmissive member is placed to cross the image plane such that the image plane is divided into a first region and a second region, the plate-like light-transmissive member having a surface that faces the first and second regions, the plate-like light-transmissive member comprising an engraved portion formed on first and second parts of the surface, each of the first and second parts of the surface facing a corresponding one of the first and second regions, the engraved portion formed on each of the first and second parts of the surface serving as a reference portion with respect to the floating image of a corresponding one of the first and second regions of the image plane.