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    • 83. 发明授权
    • Distortion free ophthalmic lens for presbyopia having wide range
distinct views
    • 用于老花眼的无失真眼科镜片具有广泛的不同视野
    • US5110199A
    • 1992-05-05
    • US649420
    • 1991-02-01
    • Takeshi Ishida
    • Takeshi Ishida
    • G02C7/02
    • G02C7/02
    • This invention relates to a lens for presbyopia free from distortional aberration for use in correcting an old-age eyesight. In the lens for presbyopia with a front lens surface having a smaller radius of curvature than a rear lens face, a lens surface has a refractive power successively corrected as the lens surface extends radially outwardly away from a geometric center of the lens so that lateral magnifications for all principal rays always equal a lateral magnification for a paraxial range. This construction is entirely free from distortional aberration, and secures a greatly enlarged range of distinct vision.
    • 本发明涉及一种用于矫正老年视力的无畸变畸变的老花眼镜。 在具有比后透镜面更小的曲率半径的前透镜表面的老花眼镜片中,透镜表面随着透镜表面径向向外延伸远离透镜的几何中心而依次校正屈光度,使得横向放大率 对于所有主光线,总是等于近轴范围的横向放大率。 这种结构完全没有扭曲畸变,并且确保了远大视野的范围。
    • 89. 发明申请
    • ILLUMINATION DEVICE AND DISPLAY DEVICE
    • 照明装置和显示装置
    • US20140140095A1
    • 2014-05-22
    • US14130532
    • 2012-06-13
    • Ryuzo YukiTakeshi IshidaFumie Kunimasa
    • Ryuzo YukiTakeshi IshidaFumie Kunimasa
    • F21V8/00
    • G02B6/0018G02B6/0016G02B6/0038G02B6/0053
    • Provided is an illumination device for obtaining planar light having satisfactory uniformity and suppressed brightness irregularities. A backlight unit (illumination device) (20) comprises a light source and a light-guiding element (23) for guiding light from the light source. The light-guiding element (23) includes prisms (23q) formed in an end area (22b) on the light source side, and prisms (23i) formed in an area (a light-emitting area (22a)) on the side opposite the light source relative to the end area (22b). The prisms (23q) vary the propagation angle of light spreading in a direction intersecting the direction of light entry, more so than the prisms (23i).
    • 提供一种用于获得具有令人满意的均匀性和抑制的亮度不规则的平面光的照明装置。 背光单元(照明装置)(20)包括光源和用于引导来自光源的光的导光元件(23)。 导光元件(23)包括形成在光源侧的端部区域(22b)中的棱镜(17a)和形成在相对侧的区域(发光区域(22a))中的棱镜(23i) 光源相对于端部区域(22b)。 棱镜(23q)改变在与光入射方向相交的方向上扩散的光的传播角度,比棱镜(23i)更大。