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    • 1. 发明申请
    • OBLIQUE PROJECTION OPTICAL SYSTEM
    • OBIIQUE投影光学系统
    • US20090168031A1
    • 2009-07-02
    • US12341239
    • 2008-12-22
    • Masayuki ImaokaKeiko Yamada
    • Masayuki ImaokaKeiko Yamada
    • G03B21/28
    • G03B21/28G02B13/16G02B17/0816G02B17/0852
    • An oblique projection optical system enlarges an image formed on a display device surface, and obliquely projects the enlarged image on a screen surface. The oblique projection optical system has, in the order from a reduction side: a refraction optical portion having a positive optical power, a concave reflection surface having a positive optical power, and a convex reflection surface having a negative optical power. The refraction optical portion includes a rotationally symmetric coaxial refraction group. An intermediate image of the image formed on the display device surface is formed between the refraction optical portion and the concave reflection surface. An aperture stop image is formed between the concave reflection surface and the convex reflection surface. The concave reflection surface and the convex reflection surface fulfill prescribed conditional formulae.
    • 倾斜投影光学系统放大在显示装置表面上形成的图像,并且将放大图像在屏幕表面上倾斜投影。 倾斜投影光学系统从具有正光焦度的折射光学部分,具有正光焦度的凹面反射面和具有负光焦度的凸面反射面的衰减侧起按顺序排列。 折射光学部分包括旋转对称的同轴折射组。 形成在显示装置表面上的图像的中间图像形成在折射光学部分和凹面反射表面之间。 在凹面反射面和凸面反射面之间形成孔径光阑图像。 凹面反射面和凸面反射面满足规定的条件式。
    • 10. 发明授权
    • Image display device and head-mounted display
    • 图像显示装置和头戴式显示器
    • US08638483B2
    • 2014-01-28
    • US13060771
    • 2009-09-12
    • Keiko YamadaYoshie Shimizu
    • Keiko YamadaYoshie Shimizu
    • G03H1/00G02B27/14
    • G02B27/0172G02B6/00G02B2027/0123G02B2027/015G02B2027/0161G02B2027/0174G02C7/086H04N5/64
    • A video image display device (1) is provided with an ocular optical system (12) that guides video image light from a display element (11) to the pupil of an observer through an ocular prism (21) and at the same time guides ambient light to the pupil of the observer through the ocular prism (21). The eyepiece optical system (12) has reflection planes set in the ocular prism (21) that are provided with three or more planes to fold down three or more times an optical path for the video image light from the display element (11), wherein an HOE (23) is formed on at least one plane of the reflection planes. The video image display device (1) satisfies a conditional equation that properly prescribes the relationship between an incident range of the video image light incident on the HOE (23) formed plane in the ocular prism (21) and a display screen size of the display element (11). Thus, the video image display device (1) can widely secure both a video image observation area and a see-through area with a small compact structure.
    • 视频图像显示装置(1)设置有眼睛光学系统(12),其将来自显示元件(11)的视频图像光通过眼镜(21)引导到观察者的瞳孔,同时引导环境 通过眼镜(21)将光照射到观察者的瞳孔。 目镜光学系统(12)具有设置在眼镜棱镜(21)中的反射面,其具有三个或更多个平面,用于将来自显示元件(11)的视频光的光路折叠三次或更多次,其中 HOE(23)形成在反射面的至少一个平面上。 视频图像显示装置(1)满足条件方程式,其适当地规定入射到眼镜27(21)中的HOE(23)形成平面上的视频光的入射范围与显示器的显示屏幕尺寸之间的关系 元件(11)。 因此,视频图像显示装置(1)可以以小的紧凑结构广泛地确保视频图像观察区域和透视区域。