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    • 65. 发明申请
    • METHOD AND APPARATUS FOR USING LASER-INDUCED FLUORESCENCE DURING PHOTORETRACTIVE KERATECTOMY
    • 在光电转换过程中使用激光诱导荧光的方法和装置
    • WO1997037622A1
    • 1997-10-16
    • PCT/US1996011667
    • 1996-07-15
    • THE UNIVERSITY OF SOUTHERN CALIFORNIAMcDONNELL, Peter, J.PHILLIPS, Andrew, F.
    • THE UNIVERSITY OF SOUTHERN CALIFORNIA
    • A61F09/00
    • A61F9/008A61B2017/00057A61B2017/00061A61F9/00804A61F2009/00844A61F2009/00872
    • Laser-induced fluorescence is generated during ablation of corneal tissue with the argon-fluoride 193nm excimer laser. An intensified charge-coupled device is used to achieve fast per-pulse temporal resolution of laser-induced fluorescence. The epithelium and stroma of a human cornea are subjected to 193nm excimer laser keratectomy. During the procedure, laser-induced fluorescence is measured. Changes in laser-induced fluorescence are detected and used to control the epithelial removal. In each layer two peaks predominated, one at about 405nm and the other at about 346nm. There is a rapid three-fold reduction in the 346nm ultraviolet peak at the transition from epithelium to stroma. By monitoring real-time changes in the measured intensity of laser-induced fluorescence during ablation of corneal tissue by the excimer laser, the transition from phototherapeutic removal of the epithelium to photorefractive reshaping of the stroma may be accurately controlled.
    • 用氩氟化物193nm准分子激光器在角膜组织消融期间产生激光诱导的荧光。 使用强化的电荷耦合器件实现激光诱导荧光的快速每脉冲时间分辨率。 对人角膜的上皮和基质进行193nm准分子激光角膜切除术。 在该过程中,测量激光诱导的荧光。 检测激光诱导荧光的变化并用于控制上皮移除。 在每个层中,两个峰占主导,一个在约405nm,另一个在约346nm。 在从上皮到基质的过渡中,346nm紫外峰的峰速度急剧下降3倍。 通过监测准分子激光在角膜组织消融期间激光诱导荧光的测量强度的实时变化,可以准确地控制从上皮的光治疗去除到基质的光折射整形的过渡。
    • 66. 发明申请
    • ASYMMETRICAL NONPOLAR DIPHENYL-DIACETYLENE LIQUID CRYSTALS AND EUTECTIC MIXTURES
    • 非对称非对苯二甲酸二乙酯液晶和保护性混合物
    • WO1994003556A1
    • 1994-02-17
    • PCT/US1993007486
    • 1993-08-09
    • HUGHES AIRCRAFT COMPANYTHE UNIVERSITY OF SOUTHERN CALIFORNIA
    • HUGHES AIRCRAFT COMPANYTHE UNIVERSITY OF SOUTHERN CALIFORNIAWU, Shin-TsonMARGERUM, J., DavidMENG, Hsiang-HuiDALTON, Larry, R.
    • C09K19/18
    • C09K19/18
    • A new class of asymmetrical diphenyl-diacetylene liquid crystal compounds exhibit ideal properties for formulating eutectic mixtures suitable for infrared and microwave applications. The new class of liquid crystal compounds comprise asymmetrical nonpolar end groups. These compounds exhibit low melting points, wide nematic temperature range and low heat fusion enthalpy. Eutectic mixtures containing entirely diphenyl-diacetylene homologs using the new compounds have high birefringence, low viscosity and wide nematic range. These unique properties are especially advantageous when these mixtures are used in infrared spatial light modulators, high speed liquid crystal modulators and polymer dispersed liquid crystals shutters. The new asymmetrical diphenyl-diacetylene liquid crystal compounds comprise the following basic structure: R1-C6H4-C=C-C=C-C6H4-R2 wherein R1 and R2 are nonpolar end groups and R1 does not equal R2. R1 is selected from the group consisting of alkyl, alkoxy, alkenyl and alkenyloxy end groups and R2 is selected from the group consisting of alkyl, alkenyl and alkenyloxy. In another embodiment, the liquid crystal compound can comprise an alkenyl group having the general formula: CxH2x+1CH=CH-(CH2)n-2-x in either the R1 or R2 location. Moreover, the liquid crystal compound can comprise such an alkenyl group in both R1 and R2 locations, so long as R1 does not equal R2. Eutectic mixtures for infrared and microwave applications comprise at least one asymmetrical nonpolar diphenyl diacetylene liquid crystal compound having the general structures described above.
    • 一类新的非对称二苯基 - 乙炔液晶化合物显示出适用于红外和微波应用的共晶混合物的理想特性。 新型液晶化合物包括非对称非极性端基。 这些化合物显示低熔点,宽向列温度范围和低热熔融焓。 使用新化合物的含有完全二苯基 - 乙炔同系物的共晶混合物具有高双折射,低粘度和宽向列范围。 当这些混合物用于红外空间光调制器,高速液晶调制器和聚合物分散的液晶快门时,这些独特的性质是特别有利的。 新的不对称二苯基 - 乙炔液晶化合物包括以下基本结构:R1-C6H4-C = C-C = C-C6H4-R2,其中R1和R2是非极性端基,R1不等于R2。 R1选自烷基,烷氧基,烯基和烯氧基端基,R2选自烷基,烯基和烯氧基。 在另一个实施方案中,液晶化合物可以包含在R1或R2位置具有通式CxH2x + 1CH = CH-(CH2)n-2-x的烯基。 此外,只要R1不等于R2,液晶化合物可以在R1和R2两个位置都可以包含这样的烯基。 用于红外和微波应用的共晶混合物包含至少一种具有上述一般结构的非对称非极性二苯基二乙炔液晶化合物。