Method of changing color play range of liquid crystal materials
    2.
    发明授权
    Method of changing color play range of liquid crystal materials 失效
    改变液晶材料色彩范围的方法

    公开(公告)号:US3663390A

    公开(公告)日:1972-05-16

    申请号:US3663390D

    申请日:1970-09-24

    CPC classification number: G01T1/04

    Abstract: Increasing dosages of X-ray radiation progressively lower the color-play range of cholesteric-phase liquid-crystal materials. The effect is enhanced when an effective amount of an iodinecontaining compound is used in the liquid-crystal material. Novel iodine-containing compounds are described, and articles are disclosed that give direct reading indication of the dosage of Xray radiation that they have received, without need for a separate development operation.

    Abstract translation: 增加X射线辐射剂量会逐渐降低胆甾相液晶材料的色彩范围。 当在液晶材料中使用有效量的含碘化合物时,效果得到提高。 描述了新的含碘化合物,并且公开了给出它们已经接收的X射线辐射剂量的直接读取指示的物品,而不需要单独的显影操作。

    Temperature-limit detection
    4.
    发明授权
    Temperature-limit detection 失效
    温度限制检测

    公开(公告)号:US3594126A

    公开(公告)日:1971-07-20

    申请号:US3594126D

    申请日:1969-04-30

    CPC classification number: G02F1/132 C09K19/36

    Abstract: BY USING CERTAIN COMPOSITIONS OF MATTER COMPRISING LIQUID CRYSTAL MATERIAL OF THE CHOLESTERIC PHASE HAVING A VISCOSISTY CONTROLLED IN ACCORDANCE WITH A DESIRED LIMIT TEMPERATURE, ONE CAN OBTAIN AN IRREVERSIBLE COLOR CHANGE THAT SERVES AS AN INDICATION THAT SUCH LIMIT TEMPERATURE HAS BEEN EXCEEDED. POSSIBLE USES INCLUDE PACKAGING OF FROZEN FOODS AND DETERMINATION OF BODY TEMPERATURES. CHOLESTERIC LIQUID-CRYSTAL MATERIAL, MICROENCAPSULATED AND/OR IN THIN-FILM FORM, IS FAST-COOLED FROM AN ABOVELIMIT TEMPERATURE AT WHICH IT EXHIBITS A CHARACTERISTIC COLOR OTHER THAN THAT WHICH IT HAS IN THE VICINITY OF THE LIMIT TEMPERATURE, RETAINING ITS HIGH-TEMPERATURE COLOR UNTIL THE LIMIT TEMPERATURE IS EXCEEDED. PARTICULAR CHOLESTERIC-PHASE LIQUID-CRYSTAL MATERIALS AMENABLE TO ACCORDANCE WITH DESIRED LIMIT TEMPERATURES, ARE ALSO TAUGHT. ARTICLES OF MANUFACTURE EMBODYING SUCH COMPOSITIONS ARE DISCLOSED.

    Method and apparatus for detecting x-ray radiation using a cholesteric detector
    6.
    发明授权
    Method and apparatus for detecting x-ray radiation using a cholesteric detector 失效
    用于检测X射线辐射的方法和装置,使用一个检测器

    公开(公告)号:US3657538A

    公开(公告)日:1972-04-18

    申请号:US3657538D

    申请日:1968-08-22

    CPC classification number: G01T1/04 C09K19/36 C09K2219/17 Y10S204/901

    Abstract: Increasing dosages of X-ray radiation progressively lower the color-play range of cholesteric-phase liquid-crystal materials. The effect is enhanced when an effective amount of an iodinecontaining compound is used in the liquid-crystal material. Novel iodine-containing compounds are described, and articles are disclosed that give direct-reading indication of the dosages of X-ray radiation that they have received, without need for a separate development operation.

    Abstract translation: 增加X射线辐射剂量会逐渐降低胆甾相液晶材料的色彩范围。 当在液晶材料中使用有效量的含碘化合物时,效果得到提高。 描述了新的含碘化合物,并且公开了给出它们已经接收的X射线辐射剂量的直接读取指示的物品,而不需要单独的显影操作。

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