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    • 114. 发明授权
    • Gaseous laser power limiter initiated by nuclear radiation
    • 气体激光功率限制器由核辐射发起
    • US5299068A
    • 1994-03-29
    • US511161
    • 1990-04-19
    • David B. CohnMichael J. NicolMitchell B. Haeri
    • David B. CohnMichael J. NicolMitchell B. Haeri
    • H01S3/00G02F1/36G02B5/23
    • H01S3/0064
    • A laser protection device employing a gas plasma switch wherein applied laser radiation is focused inside a gas chamber, and a nuclear source is employed to pre-ionize the gas volume, whereupon focused laser radiation causes gas breakdown and plasma formation that attenuates the radiation. Specifically, the invention reduces the threshold of plasma switch initiation by incorporating a nuclear source within the gas chamber that constantly injects plasma forming seed particles into the vicinity of a focused laser beam. The plasma resulting from avalanche ionization of the seed particles reflects, absorbs and deflects the laser radiation. The nuclear source introduces charged particles, excimers and metastable atoms with low ionization potential into the gas chamber. Such charged particles are effective plasma initiators because they have low ionization thresholds. The present invention has been found well suited to protect against pulsed laser sources because of fast rise times and high attenuation levels. The present invention has negligible insertion loss, fast rise time on order of 5 nsec, passive operation requiring no input power using laser initiated plasma, it operates in stand-by and is ready for operation at all times, and provides broadband protection for all wavelengths greater than about 1 .mu.m.
    • 使用气体等离子体开关的激光保护装置,其中施加的激光辐射聚焦在气体室内,并且使用核源来预先电离气体体积,由此聚焦的激光辐射导致气体分解和等离子体形成,其衰减辐射。 具体地说,本发明通过将气源室内的核源不断地注入等离子体形成种子颗粒到聚焦激光束附近来降低等离子体开关起始阈值。 由种子颗粒的雪崩电离产生的等离子体反射,吸收和偏转激光辐射。 核源将具有低电离电位的带电粒子,激发子和亚稳原子引入气室。 这种带电粒子是有效的等离子体引发剂,因为它们具有低电离阈值。 已经发现本发明非常适合于防止脉冲激光源,因为快速上升时间和高衰减水平。 本发明具有可忽略的插入损耗,5ns的快速上升时间,使用激光发射等离子体的无源输入功率的无源操作,它在待机状态下工作,随时准备运行,并为所有波长提供宽带保护 大于约1(我)m。
    • 116. 发明授权
    • Erasable visual image display device
    • 可擦除可视图像显示设备
    • US4033673A
    • 1977-07-05
    • US686974
    • 1976-05-17
    • Hajime Seki
    • Hajime Seki
    • G11C17/00C09K9/00C09K9/02G02F1/15G02F1/153G02F1/17G09F9/30G02F1/36
    • G02F1/15C09K9/02
    • An erasable visual image display device contains a pair of conductive electrodes in spaced relationship. One electrode has a cation permselective membrane thereon and the other electrode has an anion permselective membrane thereon. Positioned between the two membranes is a recording medium having the properties of being both photoionizable and capable of electrochemically producing colored species. The medium contains an electrochemically reversible acceptor molecule, for example, 1, 2, 4, 5 tetracyanobenzene and an electrochemically reversible donor molecule, for example, 1-phenyl-3 diethylaminostyrl 5-diethylaminophenyl .DELTA..sup.2 pyrazoline.
    • 可擦除可视图像显示装置包含一对间隔开的导电电极。 一个电极在其上具有阳离子选择性选择膜,另一个电极在其上具有阴离子选择性选择膜。 位于两个膜之间的是具有可光电离性并且能够电化学生产着色物质的记录介质。 培养基含有电化学可逆的受体分子,例如1,2,4,5-四氰基苯和电化学可逆的供体分子,例如1-苯基-3二乙基氨基苯乙烯5-二乙基氨基苯基DELTA 2吡唑啉。
    • 118. 发明授权
    • Color display device
    • 彩色显示设备
    • US3963314A
    • 1976-06-15
    • US507204
    • 1974-09-18
    • Akio Yamashita
    • Akio Yamashita
    • G09F13/04G02F1/15G02F1/157G02F1/17G09F9/30G02F1/36
    • G02F1/174
    • This invention relates to a novel Color Display Device constructed in the shape of a flat box. The top and bottom covers of such box have each electrode on each inner face thereof. At least one of the pair of electrodes is transparent, and also at least one of the pair has a dielectric layer on its inner face. A certain solution containing dye, is filled in the space between the pair of electrodes, and when a voltage is impressed across these electrodes, a change occurs in the light absorption of the dye solution, causing a change in the tint or the saturation of color to said solution visible under a visual light, and thus resulting in a color display.
    • 本发明涉及一种以扁平盒的形状构造的新型彩色显示装置。 这种盒的顶盖和底盖在其每个内表面上具有每个电极。 一对电极中的至少一个是透明的,并且该对电极中的至少一个在其内表面上具有电介质层。 含有染料的某种溶液被填充在一对电极之间的空间中,并且当在这些电极上施加电压时,染料溶液的光吸收发生变化,导致色调或颜色饱和度的变化 在可见光下可见的所述溶液,从而产生彩色显示。