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    • 32. 发明授权
    • Optical resonators with discontinuous phase elements
    • 具有不连续相元件的光谐振器
    • US06813286B1
    • 2004-11-02
    • US09403472
    • 2001-01-05
    • Yochay DanzigerAsher A. FriesemRam Oron
    • Yochay DanzigerAsher A. FriesemRam Oron
    • H01S310
    • H01S3/0804H01S3/0805H01S3/08068H01S3/08072H01S3/083H01S2301/20
    • A discontinuous phase element (86, 204) is disposed between the reflector (20, 23) elements of an optical resonator in order to suppress unwanted modes propagating within the cavity, and to preferentially allow the existence of preferred modes within the cavity. The discontinuous phase element (204) operates by producing sharp changes in the phase distribution of the undesirable modes, so that their propagation losses are sufficiently high prevent their build-up. This is achieved by introducing a discontinuous phase change to these modes at locations where they have high intensity. At the same time, the desired modes suffer 0 or 2&pgr; phase change, or have low intensity at the discontinuity, and so are unaffected by the discontinuous phase element. Such elements can be used in a single element or a double element configuration, and can be used in passive cavities or active cavities, such as lasers. In addition to being able to improve the output beam quality of a laser by encouraging output of the lowest order mode beam, they can also be used to improve the maximum power output of solid state lasers by encouraging the output of specific higher order mode beams, without limiting dynamic range of the laser. They can also be used to compensate for birefringence distortion in the gain medium.
    • 在光谐振器的反射器(20,23)元件之间设置不连续相位元件(86,204),以便抑制在空腔内传播的不想要的模式,并且优先地允许腔内存在优选模式。 不连续相元件(204)通过产生不期望的模式的相位分布的急剧变化来操作,使得它们的传播损耗足够高防止它们的积聚。 这是通过在它们具有高强度的位置处对这些模式引入不连续相变来实现的。 同时,期望的模式遭受0或2pi相位变化,或者在不连续处具有低强度,因此不受不连续相位元件的影响。 这种元件可以用于单个元件或双元件配置中,并且可以用于无源腔或主动空腔,例如激光器。 除了通过鼓励输出最低阶模式光束能够提高激光器的输出光束质量之外,还可以通过鼓励特定高阶模式光束的输出来改善固态激光器的最大功率输出, 而不限制激光的动态范围。 它们也可用于补偿增益介质中的双折射失真。
    • 33. 发明申请
    • MULTI-MODAL IMAGING
    • 多模式成像
    • US20100245813A1
    • 2010-09-30
    • US12409788
    • 2009-03-24
    • Tamir MARGALITRam OronAmir Noy
    • Tamir MARGALITRam OronAmir Noy
    • G01N21/00
    • G01N21/956G01N2021/95638
    • A method for scanning a surface with a number of different illumination configurations, the method comprises capturing a plurality of images in a sequential manner during a single sweep, each image including one or more lines of pixels, sequentially altering an illumination configuration used to capture the plurality of images according to a predefined sequence of illumination configurations and shifts of the relative position of the imaging unit for capturing each of the plurality of images, and repeating the sequence of illumination configurations settings and associated image capture positions until a desired area of the surface is scanned, wherein said predefined shift is between 10 pixels and less then one pixel.
    • 一种用于扫描具有多个不同照明配置的表面的方法,所述方法包括在单次扫描期间以顺序方式捕获多个图像,每个图像包括一行或多行像素,顺序地改变用于捕获所述图像的照明配置 根据照明配置的预定顺序和用于捕获多个图像中的每一个的成像单元的相对位置的偏移并且重复照明配置设置和相关联的图像捕获位置的顺序的多个图像,直到表面的期望区域 被扫描,其中所述预定位移在10个像素之间并且小于一个像素。
    • 34. 发明授权
    • Multi-modal imaging
    • 多模态成像
    • US08144973B2
    • 2012-03-27
    • US12409788
    • 2009-03-24
    • Tamir MargalitRam OronAmir Noy
    • Tamir MargalitRam OronAmir Noy
    • G06K9/00
    • G01N21/956G01N2021/95638
    • A method for scanning a surface with a number of different illumination configurations, the method comprises capturing a plurality of images in a sequential manner during a single sweep, each image including one or more lines of pixels, sequentially altering an illumination configuration used to capture the plurality of images according to a predefined sequence of illumination configurations and shifts of the relative position of the imaging unit for capturing each of the plurality of images, and repeating the sequence of illumination configurations settings and associated image capture positions until a desired area of the surface is scanned, wherein said predefined shift is between 10 pixels and less then one pixel.
    • 一种用于扫描具有多个不同照明配置的表面的方法,所述方法包括在单次扫描期间以顺序方式捕获多个图像,每个图像包括一行或多行像素,顺序地改变用于捕获所述图像的照明配置 根据照明配置的预定顺序和用于捕获多个图像中的每一个的成像单元的相对位置的偏移并且重复照明配置设置和相关联的图像捕获位置的顺序的多个图像,直到表面的期望区域 被扫描,其中所述预定位移在10个像素之间并且小于一个像素。
    • 35. 发明授权
    • Optical resonators with orthogonally polarized modes
    • 具有正交偏振模式的光学谐振器
    • US06850544B2
    • 2005-02-01
    • US10099473
    • 2002-03-15
    • Asher A. FriesemShmuel BlitRam OronErez HasmanNir Davidson
    • Asher A. FriesemShmuel BlitRam OronErez HasmanNir Davidson
    • H01S3/082H01S3/098H01S3/106
    • H01S3/08036H01S3/08054H01S3/082H01S3/106H01S2301/20H01S2301/203
    • An optical resonator supporting two sets of simultaneously co-existent oscillation modes (30 and 31), having polarizations orthogonal to each other. Mode control elements (28 and 29), such as apertures and phase elements, are introduced into the resonator to allow only preferred modes to exist. The placement and orientation of the sets are designed such that the high intensity zones of one set fall on the nodes or low intensity zones of the other set in an interlaced pattern. Thus, in a laser resonator, better utilization of the gain medium (24) is achieved and the beam quality and brightness over multimode lasing are improved. This configuration improves the performance of high Fresnel number resonators, in both pulsed and continuous lasers, for applications such as scribing, drilling, cutting, target designation and rangefinding. An application of the intra-cavity coherent summation of orthogonally polarized modes is described, whereby azimuthally or radially polarized beams may be obtained.
    • 支持两组同时共存的振荡模式(30和31)的光学谐振器,具有彼此正交的极化。 将模式控制元件(28和29)(诸如孔径和相位元件)引入到谐振器中,以仅允许存在优选的模式。 这些组的放置和取向被设计成使得一组的高强度区域以交错图案落在另一组的节点或低强度区域上。 因此,在激光谐振器中,实现了增益介质(24)的更好的利用,并提高了多模激光的光束质量和亮度。 这种配置提高了脉冲和连续激光器中高菲涅尔数谐振器的性能,适用于诸如划线,钻孔,切割,目标指定和测距等应用。 描述了正交偏振模式的腔内相干求和的应用,由此可以获得方位角或径向偏振光束。