公开(公告)号：US06414320B1

公开(公告)日：2002-07-02

申请号：US09563122

申请日：2000-05-02

申请人： Muriel Y. Ishikawa ,  Lowell L. Wood ,  E. Michael Campbell ,  Brent C. Stuart ,  Michael D. Perry

发明人： Muriel Y. Ishikawa ,  Lowell L. Wood ,  E. Michael Campbell ,  Brent C. Stuart ,  Michael D. Perry

IPC分类号： B23K2600

CPC分类号： G01N21/718 ,  B23K26/0624

摘要： The composition analysis by scanning femtosecond ultraprobing (CASFLU) technology scans a focused train of extremely short-duration, very intense laser pulses across a sample. The partially-ionized plasma ablated by each pulse is spectrometrically analyzed in real time, determining the ablated material's composition. The steering of the scanned beam thus is computer directed to either continue ablative material-removal at the same site or to successively remove nearby material for the same type of composition analysis. This invention has utility in high-speed chemical-elemental, molecular-fragment and isotopic analyses of the microstructure composition of complex objects, e.g., the oxygen isotopic compositions of large populations of single osteons in bone.

摘要翻译： 通过扫描飞秒超扫描（CASFLU）技术的成分分析扫描了一个聚焦的训练样本中极短的持续时间，非常强的激光脉冲。 通过每个脉冲烧蚀的部分电离的等离子体实时进行光谱分析，确定烧蚀材料的组成。 因此，扫描光束的转向是计算机指导的，以便在相同的部位继续消融材料去除，或连续地去除附近的材料以进行相同类型的组成分析。 本发明在复杂物体的微观结构组成的高速化学元素，分子片段和同位素分析中具有实用价值，例如骨中大量单个骨骼的氧同位素组成。

公开(公告)号：US4730106A

公开(公告)日：1988-03-08

申请号：US937792

申请日：1986-12-04

申请人： David G. Nilson ,  E. Michael Campbell ,  Brian J. MacGowan ,  Hector Medecki

发明人： David G. Nilson ,  E. Michael Campbell ,  Brian J. MacGowan ,  Hector Medecki

IPC分类号： H01J29/89 ,  H01J31/50 ,  H01J40/14

CPC分类号： H01J29/892

摘要： An optical fiducial timing system is provided for use with interdependent groups of X-ray streak cameras (18). The aluminum coated (80) ends of optical fibers (78) are positioned with the photocathodes (20, 60, 70) of the X-ray streak cameras (18). The other ends of the optical fibers (78) are placed together in a bundled array (90). A fiducial optical signal (96), that is comprised of 2.omega. or 1.omega. laser light, after introduction to the bundled array (90), travels to the aluminum coated (82) optical fiber ends and ejects quantities of electrons (84) that are recorded on the data recording media (52) of the X-ray streak cameras (18). Since both 2.omega. and 1.omega. laser light can travel long distances in optical fiber with only a slight attenuation, the initial arial power density of the fiducial optical signal (96) is well below the damage threshold of the fused silica or other material that comprises the optical fibers (78, 90). Thus the fiducial timing system can be repeatably used over long durations of time.

摘要翻译： 提供光学基准定时系统，用于与相互依赖的X射线条纹照相机组（18）一起使用。 光纤（78）的铝涂层（80）端部与X射线条纹照相机（18）的光电阴极（20,60,70）定位。 光纤（78）的另一端放置在捆扎阵列（90）中。 在引入到束状阵列（90）之后，由2ω或1ω激光组成的基准光信号（96）行进到铝涂层（82）光纤端，并喷射数量的电子（84） 被记录在X射线条纹照相机（18）的数据记录介质（52）上。 由于2Ω和1Ω激光都可以在仅具有轻微衰减的光纤中行进长距离，所以基准光信号（96）的初始心率功率密度远低于熔融二氧化硅或其它材料的损伤阈值 光纤（78,90）。 因此，可以在长时间内重复使用基准定时系统。