发明授权
US08325166B2 Optical device and virtual image display device including volume hologram gratings
有权
光学装置和包括体积全息图光栅的虚像显示装置
- 专利标题: Optical device and virtual image display device including volume hologram gratings
- 专利标题(中): 光学装置和包括体积全息图光栅的虚像显示装置
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申请号: US12481284申请日: 2009-06-09
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公开(公告)号: US08325166B2公开(公告)日: 2012-12-04
- 发明人: Katsuyuki Akutsu , Satoshi Nakano , Hiroshi Mukawa
- 申请人: Katsuyuki Akutsu , Satoshi Nakano , Hiroshi Mukawa
- 申请人地址: JP Tokyo
- 专利权人: Sony Corporation
- 当前专利权人: Sony Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: K&L Gates LLP
- 优先权: JP2008-151430 20080610
- 主分类号: G06F3/038
- IPC分类号: G06F3/038 ; G09G5/00
摘要:
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.
公开/授权文献
- US20090303212A1 OPTICAL DEVICE AND VIRTUAL IMAGE DISPLAY 公开/授权日:2009-12-10