| Patent application number | Description | Published |
|---|
| 20080239424 | OPTICAL DEVICE AND VIRTUAL IMAGE DISPLAY DEVICE - A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an optical waveguide ( | 10-02-2008 |
| 20090303212 | OPTICAL DEVICE AND VIRTUAL IMAGE DISPLAY - An optical device includes: a light guide plate receiving, for each of N types of wavelength bands, a plurality of parallel light beams with different incident angles each corresponding to view angles, and guiding the received parallel light beams; a first and a second volume hologram gratings of reflection type having a diffraction configuration which includes N types of interference fringes each corresponding to the N types of wavelength bands, and diffracting/reflecting the parallel light beams. The optical device satisfies for each wavelength band, a relationship of ‘P>L’, where ‘L’ represents a central diffraction wavelength in the first and second volume hologram gratings, defined for a parallel light beam corresponding to a central view angle, and ‘P’ represents a peak wavelength of the parallel light beams. | 12-10-2009 |
| 20100142015 | HOLOGRAM RECORDING FILM AND METHOD OF MANUFACTURING SAME, AND IMAGE DISPLAY APPARATUS - A hologram recording film manufacturing method includes the steps of obtaining a laminated structure by alternately laminating M (where M≧2) photosensitive material precursor layers including a photosensitive material and at least one (M−1) resin layer on one another, obtaining M photosensitive material layers, where at least two interference fringes with a desired pitch and a desired slant angle are formed on each of the M photosensitive material layers, from the M photosensitive material precursor layers by irradiating the laminated structure with a reference laser light beam and an object laser light beam, and making the slant angles of the M photosensitive material layers different from each other while retaining the pitch value, which is defined on a face of the photosensitive material layer, by irradiating the laminated structure with an energy ray from the laminated structure's one face side, and heating the laminated structure. | 06-10-2010 |
| 20100220295 | OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY DEVICE - A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an optical waveguide ( | 09-02-2010 |
| 20110019250 | Image displaying apparatus and optical Apparatus - The image displaying apparatus includes an image production apparatus, a first light conduction section and a second light conduction section. The first light conduction section includes a first light conduction plate which propagates part of incident light thereto by total reflection in the inside thereof and emits the propagated light, and a reflection type volume hologram diffraction grating disposed on the first light conduction plate. The second light conduction section includes a second light conduction plate, a first deflection section and a second deflection section. | 01-27-2011 |
