| 摘要 |
<p>PURPOSE:To provide a right feeling of distance to a predetermined position in device for reflecting light projected from an indicating device at a window glass surface, imaging a virtual image of an object to be confirmed with respect to its position at the predetermined position and imaging always the virtual image near the predetermined position even if the view point of an observer is moved. CONSTITUTION:In a method of recording information to a second hologram dry plate 4 mounted on a vehicle, regenerated illuminating light A2 having the wave surface conjugate with reference light A used in recording the object wave B of an object 7 located on the front side end of a vehicle to be confirmed with respect to its position is irradiated on a first hologram dry plate 8 having the object wave B recorded thereon. The diffracted wave B2 projected from the first hologram dry plate 8 images then a real image 9 of the object 7 at a predetermined position. This real image 9 is imaged at a position corresponding to the front side end of the actual vehicle and the reflecting surface 10 is in a position corresponding to one in which a window glass 5 is disposed. The diffracted wave B2 is reflected at the reflecting surface 10 and the reflected and diffracted wave C is recorded on a second hologram dry plate 4 provided in a predetermined position by the use of a reference light D.</p> |
