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    • 71. 发明授权
    • Apparatus and process for relieving eye strain from video display
terminals
    • 用于缓解视频显示终端眼睛疲劳的装置和过程
    • US5204702A
    • 1993-04-20
    • US685344
    • 1991-04-15
    • Allan W. Shapiro
    • Allan W. Shapiro
    • G02C7/00G02C7/02G02C7/14
    • G02C7/00G02C7/14
    • Eye glasses in combination with a video display terminal and a process of eye glass prescription for workers utilizing video display terminals are disclosed. At least one diopter of base in (nasal or towards the nose) prism dioptric correction is utilized in combination with accommodation relaxing spherical prescription. This prism and sphere is superimposed upon normal eye prescription for accommodation and convergence of the eye at the working distance of the information display surface of the video display terminal. Preferred location of the lens center is exactly over the pupil of the eye when the eye views straight ahead in the orthophoric state or at the distance the screen will be viewed. There results an eye glass and eye glass prescription in combination with a video display terminal in which the patient viewing the video display terminal has both reduced and relaxed convergence and accommodation. The absence of eye strain due the accommodation reflex, panning over the positive spherical component of glasses, and loss of light from stopping down of the pupil is reduced. The eye glasses have preferred use with injection molded plastic lenses having the required sphere and prism molded into the lenses. In the preferred embodiment, the transparent plastic of the lenses is impregnated throughout with ultra violet and infrared filtering media and provided with anti reflective coatings on the lens surfaces.
    • 公开了眼镜与视频显示终端的组合以及使用视频显示终端的工人的眼玻璃处方的处理。 至少一个屈光度的(鼻或鼻)屈光度的棱镜屈光矫正与康复放松球形处方结合使用。 该棱镜和球体被叠加在正常的眼睛处方上,用于在视频显示终端的信息显示表面的工作距离处调节和收敛眼睛。 当眼睛在正视状态下或在屏幕将被观看的距离处直视前方时,镜头中心的优选位置正好在眼睛的瞳孔之上。 结合眼睛玻璃和眼玻璃处方与视频显示终端的组合,其中观看视频显示终端的患者具有减少和放松的融合和调节。 由于适应反射而不存在眼睛疲劳,在眼镜的正球形分量上摇摄,并且减少了瞳孔停止的光的损失。 眼镜优选使用具有所需球体和模制在镜片中的棱镜的注塑塑料透镜。 在优选实施例中,透镜的透明塑料贯穿整个紫外线和红外线过滤介质,并在透镜表面上设置有抗反射涂层。
    • 74. 发明授权
    • Digitally enhanced imager for the visually impaired
    • 数字增强的视力障碍者成像仪
    • US5125046A
    • 1992-06-23
    • US558317
    • 1990-07-26
    • Ronald Siwoff
    • Ronald Siwoff
    • G02B27/01G02B27/22G02C7/00G02C7/10G02C11/00G09B21/00H04N1/00H04N1/195H04N7/18H04N13/00
    • H04N7/18G02B27/017G02B27/2235G09B21/008H04N1/00283H04N1/195H04N2201/0077
    • The invention consists of an apparatus and method for creating high resolution, high contrast images to enhance the functional vision of visually impaired individuals. The apparatus includes an image scanning device, a digital image enhancement device and a high resolution monitor. Video images are enhanced in real time by converting an analog input signal to a digital output. The digital output is processed in a contrast selection device, stored in high speed memory, reformed into an output image and displayed on the high resolution monitor using high scan rates. The enhancement of images containing text substantially eliminates "grey" transitions between the text and the background to improve resolution. By increasing the contrast between the text and the background as well as user selectable enlargement and character spacing by magnifying or scaling of the digital video data, the functional vision of visually impaired individuals is improved.
    • 本发明包括用于产生高分辨率,高对比度图像以增强视力受损个体的功能视觉的装置和方法。 该装置包括图像扫描装置,数字图像增强装置和高分辨率监视器。 视频图像通过将模拟输入信号转换为数字输出而实时增强。 数字输出在对比度选择装置中处理,存储在高速存储器中,重新形成输出图像,并使用高扫描速率显示在高分辨率显示器上。 包含文本的图像的增强实质上消除了文本和背景之间的“灰色”转换,以提高分辨率。 通过增加文本和背景之间的对比度,以及通过放大或缩小数字视频数据,用户可选择的放大和字符间距,改善了视障人士的功能视觉。
    • 78. 发明授权
    • Glass for multi-focal eyeglass lens
    • 玻璃多焦点眼镜镜片
    • US4568651A
    • 1986-02-04
    • US665389
    • 1984-10-26
    • Hiroji Sagara
    • Hiroji Sagara
    • C03C3/07C03C3/072C03C3/074C03C4/00G02C7/00
    • C03C3/074C03C3/072Y10S501/903
    • A glass for multi-focal eyeglass having a refractive index (n.sub.d) of 1.74 to 1.78, an Abbe number (.nu..sub.d) of 31 or more, a coefficient of thermal expansion of 82 to 95.times.10.sup.-7 and a softening point of 560.degree. to 640.degree. C., comprising, in % by weight,26 to 34% SiO.sub.2 +B.sub.2 O.sub.3 +Al.sub.2 O.sub.3 ;14 to 24% SiO.sub.2 ;6 to 14% B.sub.2 O.sub.3 ;0 to 4% Al.sub.2 O.sub.3 ;38 to 50% PbO;15 to 30% BaO+SrO+CaO+MgO+ZnO;2 to 24% BaO;0 to 17% SrO;0 to 15% CaO;0 to 10% MgO;0 to 12% ZnO; and0 to 3% ZrO.sub.2 ;wherein a weight ratio of B.sub.2 O.sub.3 /SiO.sub.2 ranges from 0.3 to 0.8 and a weight ratio of alkaline earth oxides/PbO ranges from 0.2 to 0.6.
    • 一种多焦点眼镜用玻璃,其折射率(nd)为1.74〜1.78,阿贝数(nu d)为31以上,热膨胀系数为82〜95×10-7,软化点为560〜 640℃,以重量%计含有26〜34%的SiO 2 + B 2 O 3 + Al 2 O 3; 14〜24%SiO2; 6〜14%B2O3; 0〜4%Al2O3; 38〜50%PbO; 15〜30%BaO + SrO + CaO + MgO + ZnO; 2〜24%BaO; 0〜17%SrO; 0〜15%CaO; 0〜10%MgO; 0〜12%ZnO; 和0〜3%的ZrO 2; 其中B 2 O 3 / SiO 2的重量比为0.3〜0.8,碱土金属/ PbO的重量比为0.2〜0.6。