| 摘要 |
PROBLEM TO BE SOLVED: To provide a hologram reflector capable of generating image display light based on (non-colored) diffracted light having wide diffraction wavelength width over the whole visible area and high degree of white in the wide visible area without providing reflected light reflected by a hologram reflector for generating the image display light with a specific color tone. SOLUTION: In the hologram reflector using a hologram holographically recoding reference light and object light which are mutually coherent on a photosensitive material, the object light is passed through a diffusion screen of horizontal size of 60 to 300 mm and vertical size of 100 to 300 mm as diffused light and holographically recorded under a condition of a distance of 100 to 500 mm from the photosensitive material up to the diffusion screen. |
