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    • 51. 发明授权
    • Optical device, and virtual image display device
    • 光学设备和虚拟图像显示设备
    • US08073296B2
    • 2011-12-06
    • US13102397
    • 2011-05-06
    • Hiroshi MukawaKatsuyuki Akutsu
    • Hiroshi MukawaKatsuyuki Akutsu
    • G02B6/26G02B5/32
    • G02B27/0172G02B5/18G02B5/1842G02B6/00G02B6/0026G02B6/0033G02B6/005G02B6/2848G02B6/43G02B13/18G02B17/004G02B17/006G02B17/0856G02B27/0081G02B27/01G02B27/0103G02B27/017G02B27/144G02B2027/0116G02B2027/0118G02B2027/0125G02B2027/0174
    • A virtual image display device 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 to guide, by internal total reflection, parallel pencil groups meeting a condition of internal total reflection, a first reflection volume hologram grating to diffract and reflect the parallel pencil groups incident upon the optical waveguide from outside and traveling in different directions as they are so as to meet the condition of internal total reflection inside the optical waveguide and a second reflection volume hologram grating to project the parallel pencil groups guided by internal total reflection inside the optical waveguide as they are from the optical waveguide by diffraction and reflection thereof so as to depart from the condition of internal total reflection inside the optical waveguide. Some of the parallel pencil groups guided through the optical waveguide being totally reflected different numbers of times for a period from external incidence upon the optical waveguide until outgoing from the optical waveguide.
    • 虚拟图像显示装置,其通过虚拟光学系统显示用于以放大形式观看虚拟图像的二维图像。 虚拟图像显示装置包括光波导,通过内部全反射来引导满足内部全反射条件的平行笔组,第一反射体积全息图光栅,用于从外部衍射并反射入射在光波导上的平行笔组, 沿着不同方向行进,以满足光波导内的内部全反射的条件和第二反射体全息图光栅,以使来自光波导的光波导内的内部全反射引导的平行笔组投影 通过其衍射和反射,以便偏离光波导内的内部全反射的条件。 引导穿过光波导的一些平行铅笔组在从光波导的外部入射到光波导出射的时间段内被完全反射不同的次数。