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    • 1. 发明授权
    • Ruggedized display enclosure
    • 坚固的显示屏
    • US08164886B1
    • 2012-04-24
    • US12765211
    • 2010-04-22
    • David J. ShelanderJeffrey M. Borning
    • David J. ShelanderJeffrey M. Borning
    • G06F1/16
    • G06F1/1601G06F1/182Y10T428/28
    • A ruggedized display enclosure is described that houses an electronic display while withstanding severe shock and vibration, as well as environmental drip, such as for example conditions encountered in military environments. The ruggedized display enclosure has a cover structure to house the electronic display, but also allows the electronic display to be seen through the cover structure, so that the electronic display is usable when inside the enclosure. A damping material is arranged on outer areas of such an electronic display, between the electronic display and the cover structure. The damping material is arranged to allow the electronic display to be suspended with respect to the cover structure, thereby protecting the electronic display against conditions of shock and vibration.
    • 描述了一种坚固的显示器外壳,其容纳电子显示器,同时具有严重的冲击和振动以及环境滴落,例如在军事环境中遇到的条件。 坚固耐用的显示外壳具有用于容纳电子显示器的盖结构,还允许通过盖结构看到电子显示器,使得电子显示器可在外壳内使用。 阻尼材料布置在电子显示器和盖结构之间的这种电子显示器的外部区域上。 阻尼材料被布置成允许电子显示器相对于盖结构悬挂,从而保护电子显示器免受冲击和振动的影响。
    • 4. 发明授权
    • Focused optical beam encoder of position
    • 聚焦光束编码器的位置
    • US4899048A
    • 1990-02-06
    • US43167
    • 1987-04-27
    • David J. Shelander
    • David J. Shelander
    • G01D5/36G01D5/347
    • G01D5/34715
    • A light beam, typically 780 nanometer coherent light generated by a laser diode, is focused, preferably by a wide angle graded index optics lens having a numerical aperture of 0.46 and a diameter of 1.8 mm, into a diffraction limited spot, of approximate diameter 0.039 to 0.3 mils, upon an encoder wheel. The encoder wheel is typically a photoetched radial reticular grating on Mylar.RTM. plastic having lines at 0.00025" width at a radius of 1". The focused light beam intercepts the encoder wheel at this 1" radius and is alternately transmitted and obstructed by the reticular grating of the rotating encoder wheel. The selectivity transmitted light beam is received at a detector, typically a phototransistor. Greater than 10,000 transitions per encoder wheel revolution are detectable.
    • 通常由激光二极管产生的780纳米相干光的光束优选地通过数值孔径为0.46和直径为1.8mm的广角渐变折射率光学透镜聚焦成约0.039的衍射极限点 到0.3密耳,在编码轮上。 编码轮通常是在Mylar TM塑料上的光刻的径向网状光栅,其具有在半径为1“的0.00025”宽度的线。 聚焦光束在该“1”半径处拦截编码器轮,并被旋转的编码器轮的网状光栅交替传输和阻挡。 选择性透射光束在检测器(通常是光电晶体管)处被接收。 每个编码器轮转可超过10,000个转换。