Recording medium for optical data storage
    5.
    发明授权
    Recording medium for optical data storage 失效
    用于光学数据存储的记录介质

    公开(公告)号:US4861697A

    公开(公告)日:1989-08-29

    申请号:US202499

    申请日:1988-06-03

    摘要: An optical data storage element in which information can be recorded and read directly afterwards by means of laser light comprising, as a recording medium a dye dissolved or dispersed in a binder in which at least 25% by weight of the binder comprises a polymer in which at least 50% of the units have the general formula: ##STR1## in which: R.sup.1 to R.sup.8 are independently selected from hydrogen, an alkyl group of up to 12 carbon atoms, an aromatic group of up to 12 carbon atoms, halogen, ether, carboxylic acid, ketone, nitro, amino and hydroxy groups of any two adjacent groups of R.sup.1 to R.sup.8 may comprise the necessary atoms to complete a carbocyclic or heterocyclic ring, and there are at least 10 units of formula (I) within the polymer chain.The dye-polymer system possesss high sensitivity acceptable CNR and particularly good stability to repeated read.

    Fiber optic fusion splice protection sleeve
    8.
    发明授权
    Fiber optic fusion splice protection sleeve 失效
    光纤熔接保护套管

    公开(公告)号:US5731051A

    公开(公告)日:1998-03-24

    申请号:US534268

    申请日:1995-09-26

    IPC分类号: G02B6/255 G02B6/38 B65B53/02

    摘要: A sleeve for protecting and reinforcing a fusion splice of two or more optical fibers. The fusion splice protector includes a heat-shrinkable sleeve adapted to surround the fusion splice and adjacent portions of the fused optical fibers, a stress-relieving support element adjacent the fusion splice, and a hot-melt adhesive contained within the sleeve for retaining the support element adjacent a longitudinal section of the sleeve. The support element is designed to impart varying elasticity along a length of the sleeve such that the fusion splice protector is more rigid at the central portion of the sleeve member than at its ends. This may advantageously be achieved by providing a support element having a cross-sectional profile which varies along the length of the sleeve. The support element is preferably constructed of a polymer or polymer blend, most preferably one having a coefficient of thermal expansion which is approximately equal to the coefficient of thermal expansion of the optical fibers.

    摘要翻译: 用于保护和加强两根或更多根光纤的熔接的套筒。 融合接头保护器包括适于包围融合接头和熔接光纤的相邻部分的热收缩套管,与熔接接头相邻的应力释放支撑元件,以及包含在套筒内的热熔粘合剂,用于保持支撑件 元件邻近套筒的纵向部分。 支撑元件被设计成沿着套筒的长度赋予变化的弹性,使得熔接接头保护器在套筒构件的中心部分比在其端部处更加刚性。 这可以有利地通过提供具有沿套筒的长度而变化的横截面轮廓的支撑元件来实现。 支撑元件优选由聚合物或聚合物共混物构成,最优选具有大约等于光纤的热膨胀系数的热膨胀系数。