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    • 2. 发明授权
    • Gaussian beam profile shaping apparatus, method therefor and evaluation
thereof
    • 高斯光束轮廓成形装置及其评估方法
    • US5864430A
    • 1999-01-26
    • US711783
    • 1996-09-10
    • Fred M. DickeyScott C. HolswadeLouis A. Romero
    • Fred M. DickeyScott C. HolswadeLouis A. Romero
    • B23K26/06B23K26/073G02B27/09H01S3/00G02B27/46B23K26/00H01S3/10
    • G02B27/09B23K26/073G02B27/0927G02B27/0955H01S3/005
    • A method and apparatus maps a Gaussian beam into a beam with a uniform irradiance profile by exploiting the Fourier transform properties of lenses. A phase element imparts a design phase onto an input beam and the output optical field from a lens is then the Fourier transform of the input beam and the phase function from the phase element. The phase element is selected in accordance with a dimensionless parameter which is dependent upon the radius of the incoming beam, the desired spot shape, the focal length of the lens and the wavelength of the input beam. This dimensionless parameter can also be used to evaluate the quality of a system. In order to control the radius of the incoming beam, optics such as a telescope can be employed. The size of the target spot and the focal length can be altered by exchanging the transform lens, but the dimensionless parameter will remain the same. The quality of the system, and hence the value of the dimensionless parameter, can be altered by exchanging the phase element. The dimensionless parameter provides design guidance, system evaluation, and indication as to how to improve a given system.
    • 方法和装置通过利用透镜的傅里叶变换特性将高斯光束映射成具有均匀辐照度分布的光束。 相位元件将设计阶段赋予输入光束,并且来自透镜的输出光场是相位元件的输入光束的傅立叶变换和相位函数。 相位元件根据取决于入射光束的半径,所需光斑形状,透镜的焦距和输入光束的波长的无量纲参数来选择。 该无量纲参数也可用于评估系统的质量。 为了控制入射光束的半径,可以使用诸如望远镜的光学器件。 可以通过交换变换透镜来改变目标点的尺寸和焦距,但是无量纲参数将保持不变。 可以通过交换相位元件来改变系统的质量,并因此改变无量纲参数的值。 无量纲参数提供了如何改进给定系统的设计指导,系统评估和指示。
    • 3. 发明授权
    • Method and apparatus for determining fat content of tissue
    • 用于测定组织脂肪含量的方法和装置
    • US06285904B1
    • 2001-09-04
    • US09536280
    • 2000-03-27
    • Thomas M. WeberBarry L. SpletzerJon R. BryanFred M. DickeyRichard N. ShagamLuc Gooris
    • Thomas M. WeberBarry L. SpletzerJon R. BryanFred M. DickeyRichard N. ShagamLuc Gooris
    • A61B600
    • A61B5/4872A61B5/0059
    • A method and apparatus for determining characteristics of tissue is disclosed. The method comprises supplying optical energy to a tissue and detecting at a plurality of locations consequent energy scattered by the tissue. Analysis of the scattered energy as taught herein provides information concerning the properties of the tissue, specifically information related to the fat and lean content and thickness of the tissue. The apparatus comprises a light source adapted to deliver optical energy to a tissue. A plurality of detectors can be mounted at different positions relative to the source to detect energy scattered by the tissue. A signal processor as taught herein can determine characteristics of the tissue from the signals from the detectors and locations of the detectors, specifically information related to the fat and lean content and thickness of the tissue.
    • 公开了一种用于确定组织特征的方法和装置。 该方法包括向组织提供光能并在多个位置检测由此导致的组织散射的能量。 本文教导的分散能量的分析提供了关于组织性质的信息,具体涉及组织的脂肪和贫乏含量和厚度的信息。 该装置包括适于将光能传递给组织的光源。 多个检测器可以安装在相对于源的不同位置,以检测组织散射的能量。 如本文教导的信号处理器可以根据来自检测器的信号和检测器的位置来确定组织的特征,具体是与组织的脂肪和贫乏含量以及厚度有关的信息。
    • 6. 发明授权
    • Method and apparatus to measure the depth of skin burns
    • 测量皮肤灼伤深度的方法和装置
    • US06381488B1
    • 2002-04-30
    • US09333769
    • 1999-06-15
    • Fred M. DickeyScott C. Holswade
    • Fred M. DickeyScott C. Holswade
    • A61B600
    • A61B5/015A61B5/445
    • A new device for measuring the depth of surface tissue burns based on the rate at which the skin temperature responds to a sudden differential temperature stimulus. This technique can be performed without physical contact with the burned tissue. In one implementation, time-dependent surface temperature data is taken from subsequent frames of a video signal from an infrared-sensitive video camera. When a thermal transient is created, e.g., by turning off a heat lamp directed at the skin surface, the following time-dependent surface temperature data can be used to determine the skin burn depth. Imaging and non-imaging versions of this device can be implemented, thereby enabling laboratory-quality skin burn depth imagers for hospitals as well as hand-held skin burn depth sensors the size of a small pocket flashlight for field use and triage.
    • 一种用于测量表面组织灼伤深度的新装置,其基于皮肤温度对突然差异温度刺激的响应速率。 这种技术可以在与烧伤的组织物理接触的情况下进行。 在一个实施方案中,取自来自红外线敏感摄像机的视频信号的后续帧中的时间相关表面温度数据。 当产生热瞬变时,例如通过关闭指向皮肤表面的加热灯,可以使用随后的时间依赖性表面温度数据来确定皮肤燃烧深度。 可以实现该设备的成像和非成像版本,从而使医院的实验室质量皮肤燃烧深度成像仪以及用于野外使用和分流的小型手电筒的手持皮肤燃烧深度传感器。
    • 9. 发明授权
    • Apparatus and method for sensing motion in a microelectro-mechanical
system
    • 用于感测微电子机械系统中运动的装置和方法
    • US5990473A
    • 1999-11-23
    • US018456
    • 1998-02-04
    • Fred M. DickeyScott C. Holswade
    • Fred M. DickeyScott C. Holswade
    • G01D5/347G02B6/35G01D5/34
    • G01D5/34723G01D5/347
    • An apparatus and method are disclosed for optically sensing motion in a microelectromechanical system (also termed a MEMS device) formed by surface micromachining or LIGA. The apparatus operates by reflecting or scattering a light beam off a corrugated surface (e.g. gear teeth or a reference feature) of a moveable member (e.g. a gear, rack or linkage) within the MEMS device and detecting the reflected or scattered light. The apparatus can be used to characterize a MEMS device, measuring one or more performance characteristic such as spring and damping coefficients, torque and friction, or uniformity of motion of the moveable member. The apparatus can also be used to determine the direction and extent of motion of the moveable member; or to determine a particular mechanical state that a MEMS device is in. Finally, the apparatus and method can be used for providing feedback to the MEMS device to improve performance and reliability.
    • 公开了用于在通过表面微加工或LIGA形成的微机电系统(也称为MEMS器件)中光学感测运动的装置和方法。 该装置通过将光束从MEMS器件内的可移动构件(例如,齿轮,齿条或连杆)的波纹表面(例如齿轮齿或参考特征)反射或散射而操作,并检测反射或散射的光。 该装置可以用于表征MEMS装置,测量一个或多个性能特征,例如弹簧和阻尼系数,扭矩和摩擦力,或可移动构件的运动的均匀性。 该装置还可用于确定可移动构件的运动方向和程度; 或者确定MEMS器件处于特定的机械状态。最后,该装置和方法可用于向MEMS器件提供反馈以提高性能和可靠性。