| 发明名称 | Projection apparatus and hologram recording medium | ||
| 摘要 | A projection apparatus has a hologram recording medium configured to be capable of diffusing coherent light beams, an irradiation unit configured to irradiate coherent light beams to the hologram recording medium so that the coherent light beams scan the hologram recording medium, a light modulator that is illuminated by coherent light beams incident on and diffused at respective points of the hologram recording medium from the irradiation unit, a projection optical system configured to project a modulated image generated by the light modulator onto a scattering plane, and an imaging optical system provided between the hologram recording medium and the light modulator, configured to converge the coherent light beams diffused at respective points of the hologram recording medium to illuminate the light modulator. | ||
| 申请公布号 | US9154756(B2) | 申请公布日期 | 2015.10.06 |
| 申请号 | US201214344762 | 申请日期 | 2012.09.18 |
| 申请人 | Dai Nippon Printing Co., Ltd. | 发明人 | Kurashige Makio;Taniguchi Yukio;Oka Ryohei;Ishida Kazutoshi |
| 分类号 | G03B21/28;H04N9/31;G02B5/32;G03H1/32;G02B27/48;G03B21/14;G03H1/22 | 主分类号 | G03B21/28 |
| 代理机构 | Burr & Brown, PLLC | 代理人 | Burr & Brown, PLLC |
| 主权项 | 1. A projection apparatus comprising: a hologram recording medium configured to be capable of diffusing coherent light beams; an irradiation unit configured to irradiate coherent light beams to the hologram recording medium so that the coherent light beams scan the hologram recording medium; a light modulator that is illuminated by coherent light beams incident on and diffused at respective points of the hologram recording medium from the irradiation unit; a projection optical system configured to project a modulated image generated by the light modulator onto a scattering plane; and an imaging optical system provided between the hologram recording medium and the light modulator, configured to converge the coherent light beams diffused at respective points of the hologram recording medium to illuminate the light modulator, wherein, when a first aperture stop and a second aperture stop are arranged in order in a direction of a scattering plane from the imaging optical system, and coherent light beams are irradiated on the second aperture from a direction of the scattering plane, the hologram recording medium records information of the coherent light beams after passing through the first aperture stop and the second aperture stop. | ||
| 地址 | Shinjuku-Ku JP | ||